CoolWiki - User contributions [en]

Lynds Target Selection

2008-04-22T04:23:57Z

Mcdonald: /* Travel Arrangements */

I haven't done this legwork yet because I thought you might want to be involved - finding a good target for observation is a substantial part of doing science! :)

Ideally, we'd pick a target for our observation using a combination of
*'''searching [http://adsabs.harvard.edu/abstract_service.html ADS] and/or [http://simbad.u-strasbg.fr/simbad/ SIMBAD] for existing literature''' .... we want something that doesn't have a LOT of other references, but some references are fine - if someone else has already assembled data on an object, we might be able to use those data and/or results - we just don't want something that has already been "done to death." ([[How_can_I_find_out_what_scientists_already_know_about_a_particular_astronomy_topic_or_object%3F|page from the wiki on literature searching]])
*'''checking POSS and other existing multi-wavelength data to see what the object looks like in those bands''' .... does it look thick and dark in the optical? bright in the infrared? Both of those things suggest that it will be interesting with Spitzer. Something that looks diaphanous in the optical will likely turn out to be completely transparent with Spitzer. ([[How_can_I_get_data_from_other_wavelengths_to_compare_with_infrared_data_from_Spitzer%3F|page from the wiki on introduction to data at other wavelengths]]; you can also do this with Leopard -- see next item.)
*and, '''checking to see if it is or is not in the Spitzer archive''' .... you need to use Leopard to do this. ([[How_do_I_download_data_from_the_Spitzer_Telescope%3F|page from the wiki on searching the archive using Leopard]]-- NB: "searching the archive to see what is there" is the same thing as "downloading data" except that when you search to see what is there, you don't actually download the data, you just see that there is something there.) Also, note that just because there is data already in the Archive on a given cloud doesn't mean it's a BAD thing, just that it's not a good thing for a new proposal. You should make a note of the "nice" ones you find, because you can go grab the data as soon as the data are public.

My original thoughts on good targets were the following three: LDN 470, LDN 1225, LDN 880 (but maybe too diaphanous). And, at the AAS, you guys also came up with LDN 1340.

=General information re: lists of targets=

The master list of objects that I worked from is [[lyndslist.txt|here]], courtesy of Babar Ali. Note that these are all opacity class 5 objects. Opacity class 5 or higher is what we probably want for Spitzer observations. None of these have many references in ADS. '''This is not meant to be a comprehensive list''' by any means, just a place to start. If you want to instead start with the complete Lynds Dark Nebulae catalog, it's [http://adsabs.harvard.edu/abs/1996yCat.7007....0L here] (the data are linked as "online data" or something similar).

Please post your thoughts and reactions to each of these targets, and any new ones you think are viable candidates for observation. For example, you might post a gif or jpeg of the POSS image you found, or a summary list of references (e.g., "3 papers besides Lynds, one radio, others submm" or whatever). Note the syntax I'm using to post comments on LDN 1340 below -- this is a method suggested by the Oil City folks, and I think it works really well to follow the conversation. See the help page linked from the left (above the search box) for hints on how do this.

--[[User:Guastella|Guastella]] 20:48, 8 January 2008 (PST)
Here is the article I mentioned in our meeting earlier today. ''(this is the one that looked in radio at optically-selected cores and reported which ones were "empty."'')

THE ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 123:233È250, 1999 July
(1999. The American Astronomical Society. All rights reserved. Printed in U.S.A.
A CATALOG OF OPTICALLY SELECTED CORES
CHANG WON LEE AND PHILIP C. MYERS
[...]
This didn't format well. Please let me know if there is a better way to send papers
Thanks
Pete [END]

(--[[User:Rebull|Rebull]] 09:25, 9 January 2008 (PST) he's right, this didn't format well, so I replaced it with a link directly to ADS, from which you can get the complete article - there's no access restrictions on it, and if you go there, you can get the originally formatted PDF or the html. [http://adsabs.harvard.edu/abs/1999ApJS..123..233L ADS link to the Lee and Myers paper] [END] )

--[[User:Rebull|Rebull]] 13:44, 14 January 2008 (PST) David added some general target selection stuff to the [https://coolwiki.ipac.caltech.edu/index.php/Talk:Lynds_Target_Selection talk page] [END]

--[[User:Rebull|Rebull]] 07:55, 18 January 2008 (PST) [[weeding down a big target list]] - step-by-step, what I did to weed down the full Lynds target list. [END]

=Observing time=
--[[User:Rebull|Rebull]] 13:59, 14 January 2008 (PST) David asked re: time to cover area.
A map I have here that goes about the depth we want covers about 0.6deg x0.6 deg with IRAC takes 1.5 hrs, and more or less the same area takes another 1.4 hrs with MIPS. 3 hrs is probably too much to ask for, especially if you want to ask for more than one cloud. less than that size, 0.3 deg x 0.3 deg, with IRAC takes 0.4 hrs, and up to 0.7 hrs with MIPS. (i can get clever and try to make that less time, but this is the lowest-energy solution.) For an irregularly-sized thing like LDN 951, i can get creative and make something other than a square map, but it takes longer for me to design.
so we need to decide if '''(a) we have something really cool we want to completely map, or (b) two smaller things (could be pieces of a large thing) we want to map to compare them.'''
Note that, for example, the object LDN 1340 is more like ~1 degree x ~1 degree, so we'd have to do just a small piece (or two small pieces) of it.
[END]

=LDN 470=

[[image:ldn470possred.gif]] LDN 470 in POSS-red. image is 0.25 deg on a side. --[[User:Rebull|Rebull]] 14:09, 14 January 2008 (PST)

--[[User:Mcdonald|Mcdonald]] 15:39, 15 January 2008 (PST) Hi, here is a colored image of LDN 470:
[[Image:ldn470.jpg]]

=LDN 1225=

[[image:ldn1225possred.gif]] LDN 1225 in POSS-red. image is 0.25 deg on a side. --[[User:Rebull|Rebull]] 14:09, 14 January 2008 (PST)

--[[User:Mcdonald|Mcdonald]] 15:44, 15 January 2008 (PST) Here is a 15 arcmin x 15 arcmin colored image of ldn1225:
[[Image:ldn1225.jpg]]

=LDN 880=

[[image:ldn880possred.gif |left]] LDN 880 in POSS-red. image is 0.25 deg on a side. Still a little worried that this is too optically thin to make a good Spitzer image. but maybe we could focus very specifically on the dark thing to the southwest.
--[[User:Rebull|Rebull]] 14:09, 14 January 2008 (PST)

[[image:deepi.png]] [[image:deepr.png]] - LDN 880, about the same scale, in relatively deep I and R from the USNO 1.0m.
--[[User:Rebull|Rebull]] 14:43, 14 January 2008 (PST)

--[[User:Mcdonald|Mcdonald]] 15:47, 15 January 2008 (PST) Here is John's colored image made in Austin again 15 x 15 arcmin:
[[Image:LDN880 by John.jpg]]

=LDN 1340=

[[image:ldn1340possred.gif|left]] LDN 1340 in POSS-red. image is 0.25 deg on a side. --[[User:Rebull|Rebull]] 14:09, 14 January 2008 (PST)

--[[User:Rebull|Rebull]] 20:14, 8 January 2008 (PST) Here's a summary of the latest developments on this object:

One of you (Peter?) suggested this object - and it was a fabulous suggestion. Beautiful in the optical, with IRAS sources, a handful of existing literature, and no Spitzer. Perfect! The icing on the cake was that it's visible in the Spring.

One of you (Peter again?) noticed that there was another AAS poster from 2005 on this object. I mentioned that I knew 2 of the authors (JoAnn O'Linger and Grace Wolf-Chase). Not 2 hours after leaving you, I ran into them. One thing I didn't mention in the context of searching the archive is that there is an open call for proposals out now, eg., there are ~700 proposals for objects that are currently being reviewed, and 20% of them will get their targets approved by March. To some extent, since you're putting in a proposal more or less now, you kind of trump them. On the other hand, it's never good to make enemies.... So, it turns out that JoAnn and collaborators have submitted a proposal to map this region over 1 square degree. There's no guarantee that their data will actually be taken this cycle (before we run out of cryogen in Spring 2009), but at the same time, we probably won't be able to ask for a full square degree (it would take too much time). We could pick a subregion to focus on, or we could find another target entirely.

I'll continue to talk to JoAnn (we had just a brief conversation today), and if I can get her posters (one from before, one from this meeting!), I'll post them here.

[END]

--[[User:Guastella|Guastella]] 20:48, 8 January 2008 (PST)
In case we are still looking at this here is the 2005 Abstract
Submillimetre Observations of an Intermediate-Mass Star Forming Cloud Core J. O’Linger, G. H. Moriarty-
Schieven, and G. A. Wolf-Chase

[http://adsabs.harvard.edu/abs/2005AAS...20718413O ADS link to AAS abstract]

[http://adsabs.harvard.edu/abs/2005prpl.conf.8600O ADS link to PPV abstract]

--[[User:Rebull|Rebull]] 09:37, 9 January 2008 (PST) I talked to JoAnn again today, and she thinks that maybe doing just a piece of the cloud would be a good idea. She showed me some of her supporting data, and indeed this is a really cool area. We could do just a part of it now, and eventually, she'll map the rest of the cloud as well.

Here's her poster from today: [[Media:joann2008poster.pdf]]

[END]
--[[User:Mcdonald|Mcdonald]] 15:51, 15 January 2008 (PST) 15 x 15 colored image:
[[Image:ldn1340.jpg]]

=LDN 951=

From: cdewolf@chsd.us
How does LDN 951 look? Assuming I did my query right, it also hasn't been looked at by Spitzer. I found it on a list of LDNs that have visual opacities of 6 in a paper by Visser et. al, 2002. There's another, but it doesn't look as interesting.
Cris L. DeWolf
[[image:LDN951.red.jpg]]

--[[User:Rebull|Rebull]] 14:00, 9 January 2008 (PST) ooh, this is a nice one! you're right, it doesn't have any Spitzer observations yet. This might very well be a good candidate! [END]

--[[User:Dewolf|Dewolf]] 06:00, 12 January 2008 (PST)There was a study of IRAS associations with dark clouds (Parker, N.D., 1988) that appears to indicate a good chance of there being a YSO in LDN 951. Here's a link to the article.
[http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988MNRAS.235..139P&db_key=AST&link_type=ABSTRACT&high=4788c3397d22375]
[END]

--[[User:Mcdonald|Mcdonald]] 15:54, 15 January 2008 (PST) A 15 x 15 arcmin colored image:
[[Image:ldn951.jpg]]

=Other targets=

--[[User:Rebull|Rebull]] 11:42, 9 January 2008 (PST) I found two posters today on Lynds clouds - L1221 and L988e. L1221 has Spitzer data which is pretty cool; L988 doesn't have any Spitzer data. Take a look at the other bands and references and see if it would be interesting....
[END]

--[[User:Rebull|Rebull]] 14:09, 14 January 2008 (PST) nevermind; the L988 image is pretty much just a star field. [END]

[[image:l1014.jpg|left]]
--[[User:Rebull|Rebull]] 14:27, 14 January 2008 (PST) just for comparison, here is a spitzer composite image of L1014. we'd be very lucky to find something like this, but this is the hope. [END]

--[[User:Rebull|Rebull]] 13:44, 14 January 2008 (PST) David added some general target selection stuff to the [https://coolwiki.ipac.caltech.edu/index.php/Talk:Lynds_Target_Selection talk page] [END]

--[[User:Rebull|Rebull]] 10:48, 15 January 2008 (PST) Out of David's top 16 suggestions, the only ones wihtout existing spitzer data are ldn
1357 (right on the edge of some existing spitzer data) and ldn 1358. you must be doing something right, as you're hitting popular objects. ;) [END]

--[[User:Rebull|Rebull]] 14:19, 21 January 2008 (PST) but really from jan 20: tim sent this in email:
I have been doing some looking at the Lynds targets. I'm attaching pics of LDN 1598 and LDN 1340.
I could not find anything in ADS about either of these targets, so it looks like they have not been
studied a great deal. I like the fact that you have a dark area next to a fairly rich star field
(especially with 1598). This would tend to indicate a dense nebulous area. the images are 5'x5'. (targets suggested by Tim Spuck)
here's the graphics: (L1598 first, then L1340):
[[image:tim_l1598.jpg]] [[image:tim_l1340.jpg]]

--[[User:Rebull|Rebull]] 14:26, 21 January 2008 (PST) actually, i get 19 references for ldn 1598, and 15 for L1340, both using simbad... [END]

--[[User:Spuck|Spuck]] 05:37, 22 January 2008 (PST) Luisa, just for future reference, I thought ADS was a more complete database for identification of current research. I assume this is not the case since you found many references in simbad. Is that correct? Thanks, Tim [END]

--[[User:Spuck|Spuck]] 06:57, 22 January 2008 (PST) Ok ... I think I may have answered part of my question. I was seaching on LDN1598 and coming up with nothing, but if I search on L1598 or L1340 I am at least coming up with something in ADS (one for 1598, and seven for L1340). I need to play with the parameters a bit. [END]

--[[User:Rebull|Rebull]] 17:57, 22 January 2008 (PST) they're different sorts of databases, with different strengths and weaknesses. ADS is driven by the literature itself, whereas SIMBAD is driven more by object lists. ADS is usually more complete. But, for example, some of the references for L1685 don't actually call it L1685 anywhere in the paper. ADS may or may not have the information that those papers really do have data about that object - sometimes ADS knows, and sometimes ADS doesn't. Someone at the SIMBAD end did realize (or at least THINKS) that the objects are the same, and has (hopefully correctly) tied the object to the paper. SIMBAD often requires a human to make the association between synonyms for certain objects, and this can be fallible, especially for the more obscure objects. ADS is generally more accurate in the following sense - SIMBAD may quote a spectral type, but to be sure that whatever object you are looking at really has that type, track down the original papers and make sure that the actual original paper really does cite that type. More obscure papers are rarely in SIMBAD, but they can be found in ADS. ADS and SIMBAD are heavily interlinked, so there's a lot of ways to get between them. [END]

--[[User:Dewolf|Dewolf]] 22 Jan 2008 10:19:06 (question submitted via regular email): I'd seen some images [before] with the large pixel areas as well. How do you find a potential IRAS source in a small LDN with such poor resolution? [END]

--[[User:Rebull|Rebull]] 10:19, 22 January 2008 (PST):
Your question really has a two-part answer.

The first part is that I'm not detecting sources by eye. I'm relying upon the computer-generated IRAS Point Source Catalog (PSC) and Faint Source Catalog (FSC) which are described along with the rest of the IRAS mission
information here: http://irsa.ipac.caltech.edu/IRASdocs/iras.html

If you get into the documentation, you will find that the catalog consists of, among other things, measurements at each of the 4 IRAS wavelengths, and a quality flag for each of the 4 bands. This quality flag is REALLY
IMPORTANT, as it tells us whether the computer thought it was a real detection at each band, or just an upper limit at a particular band. Because the resolution of IRAS is so poor, indeed, it can be fooled.

One of the objects in our shortlist below really did have a recognizable clear point source right on the center of the object at 25 um. But, the rest, I agree, I'd be hard-pressed to identify the source by eye. That doesn't mean it's not there, however. The computer is really good at finding real, faint sources. When we go to write this up, we really should pay attention to whether the computer felt it was a point source just at 100 um and not at 12 or 25 um. For this subset of objects, I am cheating a little because several of them have observations at other wavelengths, enough so that I know there's a real source there, so I didn't go check the quality flags for those objects.

The second aspect of the answer is that when we go look with Spitzer, it could very well be that the source dissolves away into background nebulosity, or breaks into pieces. We have an image at 24 um of something in the Perseus star-forming region that appears in the IRAS catalog as a single object, IRAS 03388+3139. But, when we look with Spitzer, it breaks up into 9 objects. This stuff appeared in Rebull et al., 2007, ApJS, 171, 447 (also findable in astro-ph, look near Jan 2007), along with an analysis of what IRAS sources dissolved away completely into nebulosity when viewed with Spitzer. The nebulosity is very complex here, so it happens.
[END]

=A (The?) Shortlist=

Goal: find anywhere from one to a few LDN likely to host young stars so that we not only have a pretty picture but also find some new baby stars. If we are going to ask for more than one cloud, they need to have different properties, so that we can explain that we are looking at THIS sort and THAT sort to compare. And we can (should) also say we will mine the Spitzer archive for more examples.

==Luisa's Favorites==

{| border="1"
|LDN
|Image
|Notes
|-
|951
|[[image:ldn951_possred.jpg]] (POSS/Red, 0.25 deg on side)
|
* from cris (see above.)
* opacity class 6 (good, deep and dark)
* 'linear' (as opposed to 'blobby')
* (Visser et al. 2002, AJ, 124, 2756) part of the cygnus rift, 700 pc away, max extinction Av=10, just 4.7 Msun in cloud
* IRAS source 21186+4320
* (ref?) two submm 'starless cores' here : in 1950 coordinates 21:18:20 +43:19:17 and 21:18:22.9 +43:19:51 -> we might not find anything, but we might find some of the youngest stars forming here.
* visible to spitzer through tomorrow 1/22 (argh!); next window june 27-sep 10.
*IRAC total time 907 sec, MIPS total time 3313 seconds. IRAC: [[media:ldn951_withirac.gif]] (irac has two fields of view, portrayed by the two colors; the region covered by both colors is the region we'll get with all 4 irac bands [3.6, 4.5, 5.8, and 8 um]. note that the specific portion of sky that we will cover rotates, so these observations are designed to catch as much of the LDN as i can and still be independent of rotation angle.) MIPS: [[media:ldn951_withmips.gif]] (MIPS has 3 cameras, but we're only using 2 -- indicated by the two colors, 24 and 70 um.
* with irac we will see mostly stars, some nebulosity. we need at least MIPS-24, which is 1191 seconds of the 3313 seconds; mips 24 will help us find stars, but also find the nebulosity. in this specific case, where we have some submm cores, mips70 is important too, as it might be just at mips70 that we see these submm cores. note that i get a little too much sky at 24 and not quite enough at 70; i'm constrained by the choices i have in the AOR construction, and i'm optimizing for science and time, not necessarily a pretty picture.
*TOTAL TIME: 1.2 hrs. (4 IRAC plus 2 MIPS)
|-
|425
|[[image:ldn425_possred.gif]] (POSS/Red, 0.25 deg on side)
[[image:ldn425_mycenter_possred.gif]]
|
* from cris' ppt based on some subset of my target weeding.
* opacity class 5 (good, pretty deep and dark)
* 'blobby' (as opposed to 'linear')
* Lee and Myers (1999, ApJS, 123, 233) find a YSO here (1950 coords: 17 44 15.4 −04 34 07)
* IRAS source 17442−0433
* Connelley et al (2007 AJ 133, 1528) find a new NIR reflection nebula here, suggestive that a YSO is illuminating the nebula, and that we will see something pretty at IRAC bands.
* the part that is the center of the coordinates given by lynds (center of image at left) seems offset from the darkest part as seen in POSS. X's in graphic at left are the IRAS point sources in this region; the northernmost one is the one listed in the literature. there is not much to the dark cloud north of the image region shown at left. I'm taking as the center 17:46:55 -04:36:25; see second graphic at left.
* visible to spitzer apr 12-may 23, then sep 21-nov 2.
* IRAC total time 657 seconds ([[media:ldn425_mycenter_possred_withirac.gif]]) MIPS-24 total time only 395 seconds. Harder to justify 70 um time too here, since it will be expensive and it's not entirely clear what we will see. Could simply plan to jump on the data right away and ask for more time to do 70 if it seems likely to be interesting. ([[media:ldn425_mycenter_possred_withmips.gif]] - box is "my center" for this observation and x's are IRAS sources.)
*TOTAL TIME: 0.3 hrs. (4 IRAC plus 1 MIPS)
|-
|981
|[[image:ldn981_possred.gif]] (POSS/Red, 0.3 (not 0.25!) deg on side)
|
* from cris' ppt based on some subset of my target weeding.
* opacity class 6 (good, deep and dark)
* 'linear' (as opposed to 'blobby')
* Quanz et al. (2007, ApJ, 656, 287, also astro-ph/0610786 -- see http://arxiv.org/abs/astro-ph/0610786 for free copy of paper) has a very interesting article about the structures around V1331 Cyg, a known YSO. They were studying the immediate environment of this thing using HST, but it is at the end of one of the filaments associated with LDN 981. One of the questions they address in this paper is whether or not V1331 Cyg formed on its own, or with 'friends.' They talk in their paper (see sections 4.2 and 4.3) about whether some objects found in the LDN black parts are real YSOs or not, and they conclude based on available evidence that they are not YSOs. BUT, maybe they just weren't looking in long enough wavelengths. We might find that these stars really are YSOs... or we may not. We may confirm that yes, they are just foreground objects superimposed on the dark lanes of the nebula. V1331 Cyg is just on the edge of the image, to the upper left, at the end of that dark lane, with the funny circular bright nebula (that was what Quanz et al studied with HST).
*[[media:timldn981.jpg| image from tim comparing more wavelengths]]
*[[media:crisldn981.jpg| image from cris comparing scales]]
* visible to Spitzer through jan 27 (argh!), then june 26-feb 3 (not a typo, nice and long!)
* some existing MIPS data to the east (left) and north (up) which we could grab and add in to our maps.
* IRAC total time 2152 sec ([[media:ldn981_possred_withirac.gif]]) **need to add a constraint to both IRAC and MIPS that it be done before sep 15 (1 for MIPS) in order to cover the region we want. (usually constraints are bad, but i'd have to ask for more time otherwise, and we are giving them a large window, so it should be ok.) MIPS 24 only 1191 sec. ([[media:ldn981_possred_withmips24.gif]]) Again, somewhat hard to justify asking for 70 um time, but this time, V1331 Cyg is an IRAS source, so ''maybe'' worth it. MIPS-70 alone is another 6079 sec. (!) ([[media:ldn981_possred_withmips70.gif]])
*TOTAL TIME: 0.9 hrs (4 irac plus 1 mips) or 2.6 hrs (4 irac plus 2 mips)
|-
|1143
|[[image:ldn1143_possred.gif]] (POSS/Red, 0.3 deg on side - now spot won't let me do 0.25, ??)
|
* from cris' ppt based on some subset of my target weeding.
* opacity class 6 (good, deep and dark)
* 'blobby' (as opposed to 'linear')
* Lee and Myers (1999, ApJS, 123, 233) find a YSO here (1950 coords: 21 57 03.0 58 42 25)
* IRAS source 21569+5842
* Connelley et al. (2007 AJ 133, 1528) find a new NIR reflection nebula here, suggestive that a YSO is illuminating the nebula, and that we will see something pretty at IRAC bands.
* Magnier et al. (1999, A&A, 352, 228) find something they call a "transition object" here, and is noted specifically as a "very red star." It's likely we will be better able to tell what this thing is.
* visible to Spitzer through feb 22 (too soon to schedule us) and then jul 23-mar 2 (again, not a typo, nice and long).
* IRAC total time 907 sec ([[media:ldn1143_possred_withirac.gif]] - box is 'target', x's are iras sources), MIPS-24 total time 1191 sec (just mips24, not mips70 too, again hard to justify) ([[media:ldn1143_possred_withmips24.gif]]).
* TOTAL TIME: 0.6 hrs (4 irac plus 1 mips)
|-
|1598
|[[image:ldn1598_possred.gif]] (POSS/Red, 0.3 deg on side - now spot won't let me do 0.25, ??) x's are IRAS sources
|
* from Tim based on some subset of my target weeding
* opacity class 5 (good, pretty deep and dark)
* 'blobby' (as opposed to 'linear')
* 19 refs in SIMBAD.
* IRAS 05496+0812, also WB89 718, also HH 117 VLA 1 (so clearly several people have looked here before). This is part of the lambda Ori complex, apparently, and maybe related to alpha Ori (Betelgeuse). There is a lot of Spitzer data covering parts of the lambda Ori complex, but evidently not this cloud and its friend, L1599. I will ask my friends who are studying the lambda Ori complex about this object.
* Wu et al. (2004, A&A, 426, 503) studied outflows and claim to find one here, placing the cloud at 0.9 kpc. Another paper, Hilton & Lahulla (1995, A&AS, 113, 325) cite Schwartz et al (1988) also at 900 pc.
* Rodriguez & Reipurth (1998) find the exciting source for HH117 here; our observations as planned will also cover the HH object itself.
* visible to spitzer mar 21-apr 29, then oct 18-nov 28.
* IRAC total time 907 sec ([[media:ldn1598_possred_withirac.gif]] - box is 'target', x's are iras sources), MIPS-24 total time 1191 sec (just mips24, not mips70 too, again hard to justify) ([[media:ldn1598_possred_withmips24.gif]]).
* TOTAL TIME: 0.6 hrs (4 irac plus 1 mips)
|-
|1685
|[[image:ldn1685_possred.gif]] (POSS/Red, 0.25 deg on side)
|
* from Chelen based on some subset of my target weeding
* opacity class 5 (good, pretty deep and dark)
* 'blobby' (as opposed to 'linear')
* 10 references in SIMBAD; aliases include BHR 157, [CB88] 73, Barnard 56, DCld 352.9+04.8
* Huard et al. (1999, ApJ, 526, 833) does NOT detect this in the submm, and is able to constrain the distance at <160 pc (in front of the ophiuchus clouds).
* I think it was also undetected by Bourke et al. (1995 MNRAS) in ammonia.
* there is an IRAS source here; see x's in figure to left. IRAS 17056-3204 is the one closest to the center.
* visible to spitzer apr 4-may 13 then sep 14-oct 24
* IRAC total time 907 sec ([[media:ldn1685_possred_withirac.gif]] - box is 'target', x's are iras sources), MIPS-24 total time 1191 sec (just mips24, not mips70 too, again hard to justify) ([[media:ldn1685_possred_withmips24.gif]]).
* TOTAL TIME: 0.6 hrs (4 irac plus 1 mips)
|}

the AOR file to load into spot is here: [[media:lyndsaors.aor.txt]] - i had to add a ".txt" extension to get the wiki to accept it, but you should save the file to disk and rename it as just ".aor" and then Spot will recognize it as an AOR file.

==Middle-of-the-road candidates==
Usually they're just here because there's no good reason to reject them, but others seem prettier or more likely to host stars.
*LDN 470 - small, opacity class=6.
*LDN 1225 - bigger, opacity class 4 only (too thin?)
*LDN 1125 - opacity class=5, blotchy/blobby, same as Barnard 152, Lee and Myers say YSO but appears in 'starless core' papers.
*LDN 1139 - opacity class=5, blotchy/blobby, Lee and Myers say YSO but appears in 'starless core' papers.

==Rejects, and reasons:==
*LDN 880 - lee and myers say no YSO; rather thin in optical images, and might just see through it in spitzer.
*LDN 769 - lee and myers say no YSO; mentioned in several other "starless core" papers.
*LDN 778 - many simbad refs (>40!) but most of them are 'starless core' papers
*LDN 1041 - image looks like a plain star field
*LDN 1082 - image looks like a plain star field
*LDN 1340 - nice image, but consensus from the group was that they wanted to work in a 'new' region.

=Voting and Ranking=

If the editing of the table in the wiki intimidates you, or you're worried about making sure your vote appears under your column (this can be tricky), feel free to just email me your ranking, and I'll enter it here. "1" is high (most favorite), "6" is low (least favorite). So as not to bias you, I won't put in my votes until the very end.

{| border="1"
|LDN
|Pete
|Chelen
|David
|John
|Cris
|Tim
|Luisa
|AVERAGE
|-
|951
|6
|5
|1
|4
|5
|5
|5
|'''4.4'''
|-
|425
|2
|2
|
|2
|2
|2
|3
|'''2.2'''
|-
|981
|1
|1
|2
|1
|1
|1
|1
|'''1.1'''
|-
|1143
|3
|4
|3
|5
|3
|4
|2
|'''3.4'''
|-
|1598
|4
|6
|
|3
|4
|3
|4
|'''4.0'''
|-
|1685
|5
|3
|
|6
|6
|6
|6
|'''5.3'''
|}

Rank-ordered list is therefore:
*LDN 981 (rank 1.1) - 0.9 hrs spitzer time
*LDN 425 (rank 2.2) - 0.3 hrs spitzer time
*LDN 1143 (rank 3.4) - 0.6 hrs spitzer time
*LDN 1598 (rank 4.0) - 0.6 hrs spitzer time
*LDN 951 (rank 4.4) - 1.2 hrs spitzer time
*LDN 1685 (rank 5.3) - 0.6 hrs spitzer time

I would counsel that you write a proposal for the top two clouds. They have some different properties, and the total time request of 1.2 hrs is not completely outrageous.

--[[User:Dewolf|Dewolf]] 08:54, 29 January 2008 (PST)The paper that Luisa referred to in her discussion of LDN 981 is worth a read as we prepare our proposal. Here is a direct link to a pdf of it [[media:0610786v1.pdf]]. The authors suggest that V1331 Cyg evolved from one of the filaments in this linear cloud. To me, this implies a strong possibility of additional YSOs in the cloud. What do you think? [END]

--[[User:Rebull|Rebull]] 13:02, 30 January 2008 (PST) Yep, i think it's a strong possibility, but also look at the rest of the text i posted above in the entry for 981 :
Quanz et al. (2007, ApJ, 656, 287, also astro-ph/0610786 -- see http://arxiv.org/abs/astro-ph/0610786 for free
copy of paper) [...] One of the questions they address in this paper is whether or not V1331 Cyg formed on its own,
or with 'friends.' They talk in their paper (see sections 4.2 and 4.3) about whether some objects found in the LDN
black parts are real YSOs or not, and they conclude based on available evidence that they are not YSOs. BUT, maybe
they just weren't looking in long enough wavelengths. We might find that these stars really are YSOs... or we may
not. We may confirm that yes, they are just foreground objects superimposed on the dark lanes of the nebula.

--[[User:CJohnson|CJohnson]] 11:11, 21 April 2008 (CDT)
=Travel Arrangements=
If you want to e-mail me your travel arrangements, I would be happy to update this chart.

{| border="1"
|LDN
|Pete
|Chelen
|David
|John
|Cris
|Tim

|-
|Arrival date/time
|x
|13-June, 20:15
|13-June
|13-June,
|13-June
|x
|
|-
|# of students (male/female)
|x
|0/0
|1/2
|0/0
|2/0
|x

|-
|Hotel**
|x
|HIE
|x
|X
|x
|x
|
|-
|Auto rental??
|x
|no
|my car
|no
|no
|van
|
|-
|Departure date/time
|x
|18-June 7:15
|19-June
|18- June
|18-June
|x
|}

**HIE=Holiday Inn Express-Pasadena, BW=Best Western Pasadena Royale

Peace,
--chj
[END]

Lynds Target Selection

2008-04-22T04:19:40Z

Mcdonald: /* Travel Arrangements */

I haven't done this legwork yet because I thought you might want to be involved - finding a good target for observation is a substantial part of doing science! :)

Ideally, we'd pick a target for our observation using a combination of
*'''searching [http://adsabs.harvard.edu/abstract_service.html ADS] and/or [http://simbad.u-strasbg.fr/simbad/ SIMBAD] for existing literature''' .... we want something that doesn't have a LOT of other references, but some references are fine - if someone else has already assembled data on an object, we might be able to use those data and/or results - we just don't want something that has already been "done to death." ([[How_can_I_find_out_what_scientists_already_know_about_a_particular_astronomy_topic_or_object%3F|page from the wiki on literature searching]])
*'''checking POSS and other existing multi-wavelength data to see what the object looks like in those bands''' .... does it look thick and dark in the optical? bright in the infrared? Both of those things suggest that it will be interesting with Spitzer. Something that looks diaphanous in the optical will likely turn out to be completely transparent with Spitzer. ([[How_can_I_get_data_from_other_wavelengths_to_compare_with_infrared_data_from_Spitzer%3F|page from the wiki on introduction to data at other wavelengths]]; you can also do this with Leopard -- see next item.)
*and, '''checking to see if it is or is not in the Spitzer archive''' .... you need to use Leopard to do this. ([[How_do_I_download_data_from_the_Spitzer_Telescope%3F|page from the wiki on searching the archive using Leopard]]-- NB: "searching the archive to see what is there" is the same thing as "downloading data" except that when you search to see what is there, you don't actually download the data, you just see that there is something there.) Also, note that just because there is data already in the Archive on a given cloud doesn't mean it's a BAD thing, just that it's not a good thing for a new proposal. You should make a note of the "nice" ones you find, because you can go grab the data as soon as the data are public.

My original thoughts on good targets were the following three: LDN 470, LDN 1225, LDN 880 (but maybe too diaphanous). And, at the AAS, you guys also came up with LDN 1340.

=General information re: lists of targets=

The master list of objects that I worked from is [[lyndslist.txt|here]], courtesy of Babar Ali. Note that these are all opacity class 5 objects. Opacity class 5 or higher is what we probably want for Spitzer observations. None of these have many references in ADS. '''This is not meant to be a comprehensive list''' by any means, just a place to start. If you want to instead start with the complete Lynds Dark Nebulae catalog, it's [http://adsabs.harvard.edu/abs/1996yCat.7007....0L here] (the data are linked as "online data" or something similar).

Please post your thoughts and reactions to each of these targets, and any new ones you think are viable candidates for observation. For example, you might post a gif or jpeg of the POSS image you found, or a summary list of references (e.g., "3 papers besides Lynds, one radio, others submm" or whatever). Note the syntax I'm using to post comments on LDN 1340 below -- this is a method suggested by the Oil City folks, and I think it works really well to follow the conversation. See the help page linked from the left (above the search box) for hints on how do this.

--[[User:Guastella|Guastella]] 20:48, 8 January 2008 (PST)
Here is the article I mentioned in our meeting earlier today. ''(this is the one that looked in radio at optically-selected cores and reported which ones were "empty."'')

THE ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 123:233È250, 1999 July
(1999. The American Astronomical Society. All rights reserved. Printed in U.S.A.
A CATALOG OF OPTICALLY SELECTED CORES
CHANG WON LEE AND PHILIP C. MYERS
[...]
This didn't format well. Please let me know if there is a better way to send papers
Thanks
Pete [END]

(--[[User:Rebull|Rebull]] 09:25, 9 January 2008 (PST) he's right, this didn't format well, so I replaced it with a link directly to ADS, from which you can get the complete article - there's no access restrictions on it, and if you go there, you can get the originally formatted PDF or the html. [http://adsabs.harvard.edu/abs/1999ApJS..123..233L ADS link to the Lee and Myers paper] [END] )

--[[User:Rebull|Rebull]] 13:44, 14 January 2008 (PST) David added some general target selection stuff to the [https://coolwiki.ipac.caltech.edu/index.php/Talk:Lynds_Target_Selection talk page] [END]

--[[User:Rebull|Rebull]] 07:55, 18 January 2008 (PST) [[weeding down a big target list]] - step-by-step, what I did to weed down the full Lynds target list. [END]

=Observing time=
--[[User:Rebull|Rebull]] 13:59, 14 January 2008 (PST) David asked re: time to cover area.
A map I have here that goes about the depth we want covers about 0.6deg x0.6 deg with IRAC takes 1.5 hrs, and more or less the same area takes another 1.4 hrs with MIPS. 3 hrs is probably too much to ask for, especially if you want to ask for more than one cloud. less than that size, 0.3 deg x 0.3 deg, with IRAC takes 0.4 hrs, and up to 0.7 hrs with MIPS. (i can get clever and try to make that less time, but this is the lowest-energy solution.) For an irregularly-sized thing like LDN 951, i can get creative and make something other than a square map, but it takes longer for me to design.
so we need to decide if '''(a) we have something really cool we want to completely map, or (b) two smaller things (could be pieces of a large thing) we want to map to compare them.'''
Note that, for example, the object LDN 1340 is more like ~1 degree x ~1 degree, so we'd have to do just a small piece (or two small pieces) of it.
[END]

=LDN 470=

[[image:ldn470possred.gif]] LDN 470 in POSS-red. image is 0.25 deg on a side. --[[User:Rebull|Rebull]] 14:09, 14 January 2008 (PST)

--[[User:Mcdonald|Mcdonald]] 15:39, 15 January 2008 (PST) Hi, here is a colored image of LDN 470:
[[Image:ldn470.jpg]]

=LDN 1225=

[[image:ldn1225possred.gif]] LDN 1225 in POSS-red. image is 0.25 deg on a side. --[[User:Rebull|Rebull]] 14:09, 14 January 2008 (PST)

--[[User:Mcdonald|Mcdonald]] 15:44, 15 January 2008 (PST) Here is a 15 arcmin x 15 arcmin colored image of ldn1225:
[[Image:ldn1225.jpg]]

=LDN 880=

[[image:ldn880possred.gif |left]] LDN 880 in POSS-red. image is 0.25 deg on a side. Still a little worried that this is too optically thin to make a good Spitzer image. but maybe we could focus very specifically on the dark thing to the southwest.
--[[User:Rebull|Rebull]] 14:09, 14 January 2008 (PST)

[[image:deepi.png]] [[image:deepr.png]] - LDN 880, about the same scale, in relatively deep I and R from the USNO 1.0m.
--[[User:Rebull|Rebull]] 14:43, 14 January 2008 (PST)

--[[User:Mcdonald|Mcdonald]] 15:47, 15 January 2008 (PST) Here is John's colored image made in Austin again 15 x 15 arcmin:
[[Image:LDN880 by John.jpg]]

=LDN 1340=

[[image:ldn1340possred.gif|left]] LDN 1340 in POSS-red. image is 0.25 deg on a side. --[[User:Rebull|Rebull]] 14:09, 14 January 2008 (PST)

--[[User:Rebull|Rebull]] 20:14, 8 January 2008 (PST) Here's a summary of the latest developments on this object:

One of you (Peter?) suggested this object - and it was a fabulous suggestion. Beautiful in the optical, with IRAS sources, a handful of existing literature, and no Spitzer. Perfect! The icing on the cake was that it's visible in the Spring.

One of you (Peter again?) noticed that there was another AAS poster from 2005 on this object. I mentioned that I knew 2 of the authors (JoAnn O'Linger and Grace Wolf-Chase). Not 2 hours after leaving you, I ran into them. One thing I didn't mention in the context of searching the archive is that there is an open call for proposals out now, eg., there are ~700 proposals for objects that are currently being reviewed, and 20% of them will get their targets approved by March. To some extent, since you're putting in a proposal more or less now, you kind of trump them. On the other hand, it's never good to make enemies.... So, it turns out that JoAnn and collaborators have submitted a proposal to map this region over 1 square degree. There's no guarantee that their data will actually be taken this cycle (before we run out of cryogen in Spring 2009), but at the same time, we probably won't be able to ask for a full square degree (it would take too much time). We could pick a subregion to focus on, or we could find another target entirely.

I'll continue to talk to JoAnn (we had just a brief conversation today), and if I can get her posters (one from before, one from this meeting!), I'll post them here.

[END]

--[[User:Guastella|Guastella]] 20:48, 8 January 2008 (PST)
In case we are still looking at this here is the 2005 Abstract
Submillimetre Observations of an Intermediate-Mass Star Forming Cloud Core J. O’Linger, G. H. Moriarty-
Schieven, and G. A. Wolf-Chase

[http://adsabs.harvard.edu/abs/2005AAS...20718413O ADS link to AAS abstract]

[http://adsabs.harvard.edu/abs/2005prpl.conf.8600O ADS link to PPV abstract]

--[[User:Rebull|Rebull]] 09:37, 9 January 2008 (PST) I talked to JoAnn again today, and she thinks that maybe doing just a piece of the cloud would be a good idea. She showed me some of her supporting data, and indeed this is a really cool area. We could do just a part of it now, and eventually, she'll map the rest of the cloud as well.

Here's her poster from today: [[Media:joann2008poster.pdf]]

[END]
--[[User:Mcdonald|Mcdonald]] 15:51, 15 January 2008 (PST) 15 x 15 colored image:
[[Image:ldn1340.jpg]]

=LDN 951=

From: cdewolf@chsd.us
How does LDN 951 look? Assuming I did my query right, it also hasn't been looked at by Spitzer. I found it on a list of LDNs that have visual opacities of 6 in a paper by Visser et. al, 2002. There's another, but it doesn't look as interesting.
Cris L. DeWolf
[[image:LDN951.red.jpg]]

--[[User:Rebull|Rebull]] 14:00, 9 January 2008 (PST) ooh, this is a nice one! you're right, it doesn't have any Spitzer observations yet. This might very well be a good candidate! [END]

--[[User:Dewolf|Dewolf]] 06:00, 12 January 2008 (PST)There was a study of IRAS associations with dark clouds (Parker, N.D., 1988) that appears to indicate a good chance of there being a YSO in LDN 951. Here's a link to the article.
[http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988MNRAS.235..139P&db_key=AST&link_type=ABSTRACT&high=4788c3397d22375]
[END]

--[[User:Mcdonald|Mcdonald]] 15:54, 15 January 2008 (PST) A 15 x 15 arcmin colored image:
[[Image:ldn951.jpg]]

=Other targets=

--[[User:Rebull|Rebull]] 11:42, 9 January 2008 (PST) I found two posters today on Lynds clouds - L1221 and L988e. L1221 has Spitzer data which is pretty cool; L988 doesn't have any Spitzer data. Take a look at the other bands and references and see if it would be interesting....
[END]

--[[User:Rebull|Rebull]] 14:09, 14 January 2008 (PST) nevermind; the L988 image is pretty much just a star field. [END]

[[image:l1014.jpg|left]]
--[[User:Rebull|Rebull]] 14:27, 14 January 2008 (PST) just for comparison, here is a spitzer composite image of L1014. we'd be very lucky to find something like this, but this is the hope. [END]

--[[User:Rebull|Rebull]] 13:44, 14 January 2008 (PST) David added some general target selection stuff to the [https://coolwiki.ipac.caltech.edu/index.php/Talk:Lynds_Target_Selection talk page] [END]

--[[User:Rebull|Rebull]] 10:48, 15 January 2008 (PST) Out of David's top 16 suggestions, the only ones wihtout existing spitzer data are ldn
1357 (right on the edge of some existing spitzer data) and ldn 1358. you must be doing something right, as you're hitting popular objects. ;) [END]

--[[User:Rebull|Rebull]] 14:19, 21 January 2008 (PST) but really from jan 20: tim sent this in email:
I have been doing some looking at the Lynds targets. I'm attaching pics of LDN 1598 and LDN 1340.
I could not find anything in ADS about either of these targets, so it looks like they have not been
studied a great deal. I like the fact that you have a dark area next to a fairly rich star field
(especially with 1598). This would tend to indicate a dense nebulous area. the images are 5'x5'. (targets suggested by Tim Spuck)
here's the graphics: (L1598 first, then L1340):
[[image:tim_l1598.jpg]] [[image:tim_l1340.jpg]]

--[[User:Rebull|Rebull]] 14:26, 21 January 2008 (PST) actually, i get 19 references for ldn 1598, and 15 for L1340, both using simbad... [END]

--[[User:Spuck|Spuck]] 05:37, 22 January 2008 (PST) Luisa, just for future reference, I thought ADS was a more complete database for identification of current research. I assume this is not the case since you found many references in simbad. Is that correct? Thanks, Tim [END]

--[[User:Spuck|Spuck]] 06:57, 22 January 2008 (PST) Ok ... I think I may have answered part of my question. I was seaching on LDN1598 and coming up with nothing, but if I search on L1598 or L1340 I am at least coming up with something in ADS (one for 1598, and seven for L1340). I need to play with the parameters a bit. [END]

--[[User:Rebull|Rebull]] 17:57, 22 January 2008 (PST) they're different sorts of databases, with different strengths and weaknesses. ADS is driven by the literature itself, whereas SIMBAD is driven more by object lists. ADS is usually more complete. But, for example, some of the references for L1685 don't actually call it L1685 anywhere in the paper. ADS may or may not have the information that those papers really do have data about that object - sometimes ADS knows, and sometimes ADS doesn't. Someone at the SIMBAD end did realize (or at least THINKS) that the objects are the same, and has (hopefully correctly) tied the object to the paper. SIMBAD often requires a human to make the association between synonyms for certain objects, and this can be fallible, especially for the more obscure objects. ADS is generally more accurate in the following sense - SIMBAD may quote a spectral type, but to be sure that whatever object you are looking at really has that type, track down the original papers and make sure that the actual original paper really does cite that type. More obscure papers are rarely in SIMBAD, but they can be found in ADS. ADS and SIMBAD are heavily interlinked, so there's a lot of ways to get between them. [END]

--[[User:Dewolf|Dewolf]] 22 Jan 2008 10:19:06 (question submitted via regular email): I'd seen some images [before] with the large pixel areas as well. How do you find a potential IRAS source in a small LDN with such poor resolution? [END]

--[[User:Rebull|Rebull]] 10:19, 22 January 2008 (PST):
Your question really has a two-part answer.

The first part is that I'm not detecting sources by eye. I'm relying upon the computer-generated IRAS Point Source Catalog (PSC) and Faint Source Catalog (FSC) which are described along with the rest of the IRAS mission
information here: http://irsa.ipac.caltech.edu/IRASdocs/iras.html

If you get into the documentation, you will find that the catalog consists of, among other things, measurements at each of the 4 IRAS wavelengths, and a quality flag for each of the 4 bands. This quality flag is REALLY
IMPORTANT, as it tells us whether the computer thought it was a real detection at each band, or just an upper limit at a particular band. Because the resolution of IRAS is so poor, indeed, it can be fooled.

One of the objects in our shortlist below really did have a recognizable clear point source right on the center of the object at 25 um. But, the rest, I agree, I'd be hard-pressed to identify the source by eye. That doesn't mean it's not there, however. The computer is really good at finding real, faint sources. When we go to write this up, we really should pay attention to whether the computer felt it was a point source just at 100 um and not at 12 or 25 um. For this subset of objects, I am cheating a little because several of them have observations at other wavelengths, enough so that I know there's a real source there, so I didn't go check the quality flags for those objects.

The second aspect of the answer is that when we go look with Spitzer, it could very well be that the source dissolves away into background nebulosity, or breaks into pieces. We have an image at 24 um of something in the Perseus star-forming region that appears in the IRAS catalog as a single object, IRAS 03388+3139. But, when we look with Spitzer, it breaks up into 9 objects. This stuff appeared in Rebull et al., 2007, ApJS, 171, 447 (also findable in astro-ph, look near Jan 2007), along with an analysis of what IRAS sources dissolved away completely into nebulosity when viewed with Spitzer. The nebulosity is very complex here, so it happens.
[END]

=A (The?) Shortlist=

Goal: find anywhere from one to a few LDN likely to host young stars so that we not only have a pretty picture but also find some new baby stars. If we are going to ask for more than one cloud, they need to have different properties, so that we can explain that we are looking at THIS sort and THAT sort to compare. And we can (should) also say we will mine the Spitzer archive for more examples.

==Luisa's Favorites==

{| border="1"
|LDN
|Image
|Notes
|-
|951
|[[image:ldn951_possred.jpg]] (POSS/Red, 0.25 deg on side)
|
* from cris (see above.)
* opacity class 6 (good, deep and dark)
* 'linear' (as opposed to 'blobby')
* (Visser et al. 2002, AJ, 124, 2756) part of the cygnus rift, 700 pc away, max extinction Av=10, just 4.7 Msun in cloud
* IRAS source 21186+4320
* (ref?) two submm 'starless cores' here : in 1950 coordinates 21:18:20 +43:19:17 and 21:18:22.9 +43:19:51 -> we might not find anything, but we might find some of the youngest stars forming here.
* visible to spitzer through tomorrow 1/22 (argh!); next window june 27-sep 10.
*IRAC total time 907 sec, MIPS total time 3313 seconds. IRAC: [[media:ldn951_withirac.gif]] (irac has two fields of view, portrayed by the two colors; the region covered by both colors is the region we'll get with all 4 irac bands [3.6, 4.5, 5.8, and 8 um]. note that the specific portion of sky that we will cover rotates, so these observations are designed to catch as much of the LDN as i can and still be independent of rotation angle.) MIPS: [[media:ldn951_withmips.gif]] (MIPS has 3 cameras, but we're only using 2 -- indicated by the two colors, 24 and 70 um.
* with irac we will see mostly stars, some nebulosity. we need at least MIPS-24, which is 1191 seconds of the 3313 seconds; mips 24 will help us find stars, but also find the nebulosity. in this specific case, where we have some submm cores, mips70 is important too, as it might be just at mips70 that we see these submm cores. note that i get a little too much sky at 24 and not quite enough at 70; i'm constrained by the choices i have in the AOR construction, and i'm optimizing for science and time, not necessarily a pretty picture.
*TOTAL TIME: 1.2 hrs. (4 IRAC plus 2 MIPS)
|-
|425
|[[image:ldn425_possred.gif]] (POSS/Red, 0.25 deg on side)
[[image:ldn425_mycenter_possred.gif]]
|
* from cris' ppt based on some subset of my target weeding.
* opacity class 5 (good, pretty deep and dark)
* 'blobby' (as opposed to 'linear')
* Lee and Myers (1999, ApJS, 123, 233) find a YSO here (1950 coords: 17 44 15.4 −04 34 07)
* IRAS source 17442−0433
* Connelley et al (2007 AJ 133, 1528) find a new NIR reflection nebula here, suggestive that a YSO is illuminating the nebula, and that we will see something pretty at IRAC bands.
* the part that is the center of the coordinates given by lynds (center of image at left) seems offset from the darkest part as seen in POSS. X's in graphic at left are the IRAS point sources in this region; the northernmost one is the one listed in the literature. there is not much to the dark cloud north of the image region shown at left. I'm taking as the center 17:46:55 -04:36:25; see second graphic at left.
* visible to spitzer apr 12-may 23, then sep 21-nov 2.
* IRAC total time 657 seconds ([[media:ldn425_mycenter_possred_withirac.gif]]) MIPS-24 total time only 395 seconds. Harder to justify 70 um time too here, since it will be expensive and it's not entirely clear what we will see. Could simply plan to jump on the data right away and ask for more time to do 70 if it seems likely to be interesting. ([[media:ldn425_mycenter_possred_withmips.gif]] - box is "my center" for this observation and x's are IRAS sources.)
*TOTAL TIME: 0.3 hrs. (4 IRAC plus 1 MIPS)
|-
|981
|[[image:ldn981_possred.gif]] (POSS/Red, 0.3 (not 0.25!) deg on side)
|
* from cris' ppt based on some subset of my target weeding.
* opacity class 6 (good, deep and dark)
* 'linear' (as opposed to 'blobby')
* Quanz et al. (2007, ApJ, 656, 287, also astro-ph/0610786 -- see http://arxiv.org/abs/astro-ph/0610786 for free copy of paper) has a very interesting article about the structures around V1331 Cyg, a known YSO. They were studying the immediate environment of this thing using HST, but it is at the end of one of the filaments associated with LDN 981. One of the questions they address in this paper is whether or not V1331 Cyg formed on its own, or with 'friends.' They talk in their paper (see sections 4.2 and 4.3) about whether some objects found in the LDN black parts are real YSOs or not, and they conclude based on available evidence that they are not YSOs. BUT, maybe they just weren't looking in long enough wavelengths. We might find that these stars really are YSOs... or we may not. We may confirm that yes, they are just foreground objects superimposed on the dark lanes of the nebula. V1331 Cyg is just on the edge of the image, to the upper left, at the end of that dark lane, with the funny circular bright nebula (that was what Quanz et al studied with HST).
*[[media:timldn981.jpg| image from tim comparing more wavelengths]]
*[[media:crisldn981.jpg| image from cris comparing scales]]
* visible to Spitzer through jan 27 (argh!), then june 26-feb 3 (not a typo, nice and long!)
* some existing MIPS data to the east (left) and north (up) which we could grab and add in to our maps.
* IRAC total time 2152 sec ([[media:ldn981_possred_withirac.gif]]) **need to add a constraint to both IRAC and MIPS that it be done before sep 15 (1 for MIPS) in order to cover the region we want. (usually constraints are bad, but i'd have to ask for more time otherwise, and we are giving them a large window, so it should be ok.) MIPS 24 only 1191 sec. ([[media:ldn981_possred_withmips24.gif]]) Again, somewhat hard to justify asking for 70 um time, but this time, V1331 Cyg is an IRAS source, so ''maybe'' worth it. MIPS-70 alone is another 6079 sec. (!) ([[media:ldn981_possred_withmips70.gif]])
*TOTAL TIME: 0.9 hrs (4 irac plus 1 mips) or 2.6 hrs (4 irac plus 2 mips)
|-
|1143
|[[image:ldn1143_possred.gif]] (POSS/Red, 0.3 deg on side - now spot won't let me do 0.25, ??)
|
* from cris' ppt based on some subset of my target weeding.
* opacity class 6 (good, deep and dark)
* 'blobby' (as opposed to 'linear')
* Lee and Myers (1999, ApJS, 123, 233) find a YSO here (1950 coords: 21 57 03.0 58 42 25)
* IRAS source 21569+5842
* Connelley et al. (2007 AJ 133, 1528) find a new NIR reflection nebula here, suggestive that a YSO is illuminating the nebula, and that we will see something pretty at IRAC bands.
* Magnier et al. (1999, A&A, 352, 228) find something they call a "transition object" here, and is noted specifically as a "very red star." It's likely we will be better able to tell what this thing is.
* visible to Spitzer through feb 22 (too soon to schedule us) and then jul 23-mar 2 (again, not a typo, nice and long).
* IRAC total time 907 sec ([[media:ldn1143_possred_withirac.gif]] - box is 'target', x's are iras sources), MIPS-24 total time 1191 sec (just mips24, not mips70 too, again hard to justify) ([[media:ldn1143_possred_withmips24.gif]]).
* TOTAL TIME: 0.6 hrs (4 irac plus 1 mips)
|-
|1598
|[[image:ldn1598_possred.gif]] (POSS/Red, 0.3 deg on side - now spot won't let me do 0.25, ??) x's are IRAS sources
|
* from Tim based on some subset of my target weeding
* opacity class 5 (good, pretty deep and dark)
* 'blobby' (as opposed to 'linear')
* 19 refs in SIMBAD.
* IRAS 05496+0812, also WB89 718, also HH 117 VLA 1 (so clearly several people have looked here before). This is part of the lambda Ori complex, apparently, and maybe related to alpha Ori (Betelgeuse). There is a lot of Spitzer data covering parts of the lambda Ori complex, but evidently not this cloud and its friend, L1599. I will ask my friends who are studying the lambda Ori complex about this object.
* Wu et al. (2004, A&A, 426, 503) studied outflows and claim to find one here, placing the cloud at 0.9 kpc. Another paper, Hilton & Lahulla (1995, A&AS, 113, 325) cite Schwartz et al (1988) also at 900 pc.
* Rodriguez & Reipurth (1998) find the exciting source for HH117 here; our observations as planned will also cover the HH object itself.
* visible to spitzer mar 21-apr 29, then oct 18-nov 28.
* IRAC total time 907 sec ([[media:ldn1598_possred_withirac.gif]] - box is 'target', x's are iras sources), MIPS-24 total time 1191 sec (just mips24, not mips70 too, again hard to justify) ([[media:ldn1598_possred_withmips24.gif]]).
* TOTAL TIME: 0.6 hrs (4 irac plus 1 mips)
|-
|1685
|[[image:ldn1685_possred.gif]] (POSS/Red, 0.25 deg on side)
|
* from Chelen based on some subset of my target weeding
* opacity class 5 (good, pretty deep and dark)
* 'blobby' (as opposed to 'linear')
* 10 references in SIMBAD; aliases include BHR 157, [CB88] 73, Barnard 56, DCld 352.9+04.8
* Huard et al. (1999, ApJ, 526, 833) does NOT detect this in the submm, and is able to constrain the distance at <160 pc (in front of the ophiuchus clouds).
* I think it was also undetected by Bourke et al. (1995 MNRAS) in ammonia.
* there is an IRAS source here; see x's in figure to left. IRAS 17056-3204 is the one closest to the center.
* visible to spitzer apr 4-may 13 then sep 14-oct 24
* IRAC total time 907 sec ([[media:ldn1685_possred_withirac.gif]] - box is 'target', x's are iras sources), MIPS-24 total time 1191 sec (just mips24, not mips70 too, again hard to justify) ([[media:ldn1685_possred_withmips24.gif]]).
* TOTAL TIME: 0.6 hrs (4 irac plus 1 mips)
|}

the AOR file to load into spot is here: [[media:lyndsaors.aor.txt]] - i had to add a ".txt" extension to get the wiki to accept it, but you should save the file to disk and rename it as just ".aor" and then Spot will recognize it as an AOR file.

==Middle-of-the-road candidates==
Usually they're just here because there's no good reason to reject them, but others seem prettier or more likely to host stars.
*LDN 470 - small, opacity class=6.
*LDN 1225 - bigger, opacity class 4 only (too thin?)
*LDN 1125 - opacity class=5, blotchy/blobby, same as Barnard 152, Lee and Myers say YSO but appears in 'starless core' papers.
*LDN 1139 - opacity class=5, blotchy/blobby, Lee and Myers say YSO but appears in 'starless core' papers.

==Rejects, and reasons:==
*LDN 880 - lee and myers say no YSO; rather thin in optical images, and might just see through it in spitzer.
*LDN 769 - lee and myers say no YSO; mentioned in several other "starless core" papers.
*LDN 778 - many simbad refs (>40!) but most of them are 'starless core' papers
*LDN 1041 - image looks like a plain star field
*LDN 1082 - image looks like a plain star field
*LDN 1340 - nice image, but consensus from the group was that they wanted to work in a 'new' region.

=Voting and Ranking=

If the editing of the table in the wiki intimidates you, or you're worried about making sure your vote appears under your column (this can be tricky), feel free to just email me your ranking, and I'll enter it here. "1" is high (most favorite), "6" is low (least favorite). So as not to bias you, I won't put in my votes until the very end.

{| border="1"
|LDN
|Pete
|Chelen
|David
|John
|Cris
|Tim
|Luisa
|AVERAGE
|-
|951
|6
|5
|1
|4
|5
|5
|5
|'''4.4'''
|-
|425
|2
|2
|
|2
|2
|2
|3
|'''2.2'''
|-
|981
|1
|1
|2
|1
|1
|1
|1
|'''1.1'''
|-
|1143
|3
|4
|3
|5
|3
|4
|2
|'''3.4'''
|-
|1598
|4
|6
|
|3
|4
|3
|4
|'''4.0'''
|-
|1685
|5
|3
|
|6
|6
|6
|6
|'''5.3'''
|}

Rank-ordered list is therefore:
*LDN 981 (rank 1.1) - 0.9 hrs spitzer time
*LDN 425 (rank 2.2) - 0.3 hrs spitzer time
*LDN 1143 (rank 3.4) - 0.6 hrs spitzer time
*LDN 1598 (rank 4.0) - 0.6 hrs spitzer time
*LDN 951 (rank 4.4) - 1.2 hrs spitzer time
*LDN 1685 (rank 5.3) - 0.6 hrs spitzer time

I would counsel that you write a proposal for the top two clouds. They have some different properties, and the total time request of 1.2 hrs is not completely outrageous.

--[[User:Dewolf|Dewolf]] 08:54, 29 January 2008 (PST)The paper that Luisa referred to in her discussion of LDN 981 is worth a read as we prepare our proposal. Here is a direct link to a pdf of it [[media:0610786v1.pdf]]. The authors suggest that V1331 Cyg evolved from one of the filaments in this linear cloud. To me, this implies a strong possibility of additional YSOs in the cloud. What do you think? [END]

--[[User:Rebull|Rebull]] 13:02, 30 January 2008 (PST) Yep, i think it's a strong possibility, but also look at the rest of the text i posted above in the entry for 981 :
Quanz et al. (2007, ApJ, 656, 287, also astro-ph/0610786 -- see http://arxiv.org/abs/astro-ph/0610786 for free
copy of paper) [...] One of the questions they address in this paper is whether or not V1331 Cyg formed on its own,
or with 'friends.' They talk in their paper (see sections 4.2 and 4.3) about whether some objects found in the LDN
black parts are real YSOs or not, and they conclude based on available evidence that they are not YSOs. BUT, maybe
they just weren't looking in long enough wavelengths. We might find that these stars really are YSOs... or we may
not. We may confirm that yes, they are just foreground objects superimposed on the dark lanes of the nebula.

--[[User:CJohnson|CJohnson]] 11:11, 21 April 2008 (CDT)
=Travel Arrangements=
If you want to e-mail me your travel arrangements, I would be happy to update this chart.

{| border="1"
|LDN
|Pete
|Chelen
|David
|John
|Cris
|Tim

|-
|Arrival date/time
|x
|13-June, 20:15
|x
|13-June,
|13-June
|x
|
|-
|# of students (male/female)
|x
|0/0
|1/2
|0/0
|2/0
|x

|-
|Hotel**
|x
|HIE
|x
|X
|x
|x
|
|-
|Auto rental??
|x
|no
|x
|no
|no
|van
|
|-
|Departure date/time
|x
|18-June 7:15
|x
|18- June
|18-June
|x
|}

**HIE=Holiday Inn Express-Pasadena, BW=Best Western Pasadena Royale

Peace,
--chj
[END]

I'm ready to move on to more "advanced" color composite imaging techniques.

2008-02-18T19:05:20Z

Mcdonald: /* THIS PAGE IS STILL UNDER DEVELOPMENT... we're working on it */

== THIS PAGE IS STILL UNDER DEVELOPMENT... we're working on it ==

*Classroom activity packet from David W. McDonald, Joy-Lyn McDonald and Micah McDonald: "Making pretty pictures: How Astronomers make images" : [[media:mcdonald_images_3.9c.pdf | download pdf here]]

--[[User:Mcdonald|Mcdonald]] 11:04, 18 February 2008 (PST) Please use the new version mcdonald_images_4.0.pdf:
[[Media:mcdonald_images_4.0.pdf]]

*Image processing resources for astronomy teaching http://www.phy.duke.edu/~kolena/imagepro.html
notice in particular the pointer to tips for doing x-ray analysis with ds9: http://chandra-ed.harvard.edu/activities.html
once we feel that our site is ready for "prime time", we should tell him about this.

*FITS liberator http://www.spacetelescope.org/projects/fits_liberator/
*short guide to image processing http://www.spacetelescope.org/projects/fits_liberator/improc.html

I'm ready to move on to more "advanced" color composite imaging techniques.

2008-02-18T19:04:45Z

Mcdonald: /* THIS PAGE IS STILL UNDER DEVELOPMENT... we're working on it */

== THIS PAGE IS STILL UNDER DEVELOPMENT... we're working on it ==

*Classroom activity packet from David W. McDonald, Joy-Lyn McDonald and Micah McDonald: "Making pretty pictures: How Astronomers make images" : [[media:mcdonald_images_3.9c.pdf | download pdf here]]

--[[User:Mcdonald|Mcdonald]] 11:04, 18 February 2008 (PST) Please use the new version mcdonald_images_4.0.pdf:
[[Media:mcdonald_images_4.0.pdf] | Download pdf here]

*Image processing resources for astronomy teaching http://www.phy.duke.edu/~kolena/imagepro.html
notice in particular the pointer to tips for doing x-ray analysis with ds9: http://chandra-ed.harvard.edu/activities.html
once we feel that our site is ready for "prime time", we should tell him about this.

*FITS liberator http://www.spacetelescope.org/projects/fits_liberator/
*short guide to image processing http://www.spacetelescope.org/projects/fits_liberator/improc.html

Misc. Lesson Plans, Activities, and Useful Websites

2008-02-18T18:49:34Z

Mcdonald: /* Lesson Plans/Activities */

=Lesson Plans/Activities=

*Classroom activity packet from David W. McDonald, Joy-Lyn McDonald and Micah McDonald: "Making pretty pictures: How Astronomers make images" : [[media:mcdonald_images_3.9c.pdf | download pdf here]] (version 3.9c)

--[[User:Mcdonald|Mcdonald]] 10:42, 18 February 2008 (PST) Please use the newer version 4.0:
[[media:mcdonald_images_4.0.pdf | Download pdf HERE]]

Please feel free to add in your contributions here or elsewhere on the wiki!

File:Mcdonald images 4.0.pdf

2008-02-18T18:44:29Z

Mcdonald:

Misc. Lesson Plans, Activities, and Useful Websites

2008-02-18T18:42:33Z

Mcdonald: /* Lesson Plans/Activities */

=Lesson Plans/Activities=

*Classroom activity packet from David W. McDonald, Joy-Lyn McDonald and Micah McDonald: "Making pretty pictures: How Astronomers make images" : [[media:mcdonald_images_3.9c.pdf | download pdf here]] (version 3.9c)

--[[User:Mcdonald|Mcdonald]] 10:42, 18 February 2008 (PST) Please use the newer version 4.0:
[[media:mcdonald_images_4.0.pdf | download pdf HERE]]

Please feel free to add in your contributions here or elsewhere on the wiki!

File:Ldnlistingver2.xls

2008-01-25T20:11:57Z

Mcdonald:

Talk:Lynds Target Selection

2008-01-25T20:09:27Z

2008-01-15T00:07:02Z

Mcdonald: A listing of Lynds dark nebula with sheet 2 a listing of 6 and 5's

A listing of Lynds dark nebula with
sheet 2 a listing of 6 and 5's

Talk:Lynds Target Selection

2008-01-15T00:04:41Z

Mcdonald:

Dear All

Sorry about the mess at the bottom.
I will email the Excel file

later
david
Dear All

Ok so I deleted bad formated data below and will try posting the excel file.

later
david

Dear Lynds

I hope you all made it home safe and sound.

Wednesday night as I was driving home the sky was GREAT. Very dark and the
Milky Way sure stood out. I looked but did not see any nebula. :)

Using http://heasarc.gsfc.nasa.gov I did a search and got a list of Lynds nebula
with ra, dec, cloud area in degrees squared and rating of opacity.

I placed list on excel and sorted by opacity and then area.

Hopefully the list will be below for all 6 and 5 lens nebula.

Does any one know about what area we can look at in 1 hour?

later
david

name, ra, dec, cloud area (degree squared), area in arcmin squared I think,
opacity

LDN 53 17 23 08.90 -23 54 47.2 0.001 3.6 6

--[[User:Mcdonald|Mcdonald]] 16:04, 14 January 2008 (PST) Hi is all goes well this is the excel file:
[[Media:ldnlisting.xls]]

Talk:Lynds Target Selection

2008-01-14T23:59:51Z

Mcdonald:

Talk:Lynds Target Selection

2008-01-14T20:41:56Z

Mcdonald:

Dear All

Sorry about the mess at the bottom.
I will email the Excel file

later
david

Dear Lynds

I hope you all made it home safe and sound.

Wednesday night as I was driving home the sky was GREAT. Very dark and the
Milky Way sure stood out. I looked but did not see any nebula. :)

Using http://heasarc.gsfc.nasa.gov I did a search and got a list of Lynds nebula
with ra, dec, cloud area in degrees squared and rating of opacity.

I placed list on excel and sorted by opacity and then area.

Hopefully the list will be below for all 6 and 5 lens nebula.

Does any one know about what area we can look at in 1 hour?

later
david

name, ra, dec, cloud area (degree squared), area in arcmin squared I think,
opacity

LDN 53 17 23 08.90 -23 54 47.2 0.001 3.6 6
LDN 233 17 45 03.98 -20 01 11.6 0.001 3.6 6
LDN 222 17 41 09.65 -19 46 28.9 0.001 3.6 6
LDN 223 17 40 45.55 -19 42 30.6 0.001 3.6 6
LDN 231 17 40 21.31 -19 31 32.2 0.001 3.6 6
LDN 307 18 06 14.02 -18 26 39.1 0.001 3.6 6
LDN 308 18 06 43.99 -18 25 36.8 0.001 3.6 6
LDN 328 18 16 55.39 -17 59 52.4 0.001 3.6 6
LDN 372 18 30 34.82 -16 03 52.9 0.001 3.6 6
LDN 860 20 04 52.13 +36 03 36.0 0.001 3.6 6
LDN 953 21 21 23.38 +43 22 49.1 0.001 3.6 6
LDN 917 20 40 14.09 +44 08 42.0 0.001 3.6 6
LDN 1021 21 21 35.04 +51 01 49.8 0.001 3.6 6
LDN 1166 22 05 39.19 +59 34 38.3 0.001 3.6 6
LDN 1233 23 16 27.19 +62 20 23.3 0.001 3.6 6
LDN 228 17 40 45.43 -19 37 30.4 0.002 7.2 6
LDN 229 17 40 09.29 -19 30 33.1 0.002 7.2 6
LDN 495 18 38 53.45 -06 39 16.6 0.002 7.2 6
LDN 490 18 15 08.18 -03 48 59.8 0.002 7.2 6
LDN 709 19 14 15.07 +16 25 14.5 0.002 7.2 6
LDN 944 21 17 40.73 +43 17 38.4 0.002 7.2 6
LDN 1389 04 04 32.83 +56 54 11.5 0.002 7.2 6
LDN 1111 21 39 32.45 +57 53 38.0 0.002 7.2 6
LDN 1246 23 25 12.84 +63 36 29.9 0.002 7.2 6
LDN 108 18 10 09.72 -28 19 22.4 0.003 10.8 6
LDN 55 17 23 02.86 -23 52 47.6 0.003 10.8 6
LDN 57 17 22 38.64 -23 43 49.1 0.003 10.8 6
LDN 226 17 40 33.48 -19 39 31.3 0.003 10.8 6
LDN 509 18 53 42.10 -07 18 13.0 0.003 10.8 6
LDN 675 19 23 57.53 +11 05 54.2 0.003 10.8 6
LDN 928 20 41 01.44 +44 35 44.9 0.003 10.8 6
LDN 1103 21 41 41.90 +56 43 43.3 0.003 10.8 6
LDN 310 18 06 55.90 -18 21 36.0 0.004 14.4 6
LDN 603 18 46 20.74 +00 53 15.7 0.004 14.4 6
LDN 918 20 40 56.30 +44 05 44.5 0.004 14.4 6
LDN 1014 21 24 01.58 +49 59 56.8 0.004 14.4 6
LDN 1234 23 17 09.50 +62 24 23.8 0.004 14.4 6
LDN 1357 02 52 30.05 +68 52 18.1 0.004 14.4 6
LDN 416 18 25 16.22 -10 38 15.7 0.005 18 6
LDN 531 19 06 05.47 -06 50 20.8 0.005 18 6
LDN 502 18 07 29.90 -01 51 32.8 0.005 18 6
LDN 663 19 36 55.68 +07 33 46.4 0.005 18 6
LDN 771 19 20 42.43 +23 31 41.5 0.005 18 6
LDN 881 20 17 47.78 +39 49 23.9 0.005 18 6
LDN 951 21 21 05.42 +43 18 48.2 0.005 18 6
LDN 922 20 38 43.03 +44 35 37.0 0.005 18 6
LDN 1049 20 42 14.09 +57 30 49.7 0.005 18 6
LDN 52 17 32 11.09 -25 21 07.9 0.006 21.6 6
LDN 436 18 14 42.41 -07 24 01.8 0.006 21.6 6
LDN 460 17 58 38.11 -03 45 11.9 0.006 21.6 6
LDN 676 19 21 33.00 +11 30 44.3 0.006 21.6 6
LDN 677 19 22 20.95 +11 33 47.5 0.006 21.6 6
LDN 1185 22 29 20.52 +59 05 23.3 0.006 21.6 6
LDN 1155 20 43 31.08 +67 40 55.2 0.006 21.6 6
LDN 1358 02 55 34.85 +69 22 09.1 0.006 21.6 6
LDN 25 17 32 30.29 -26 11 06.7 0.007 25.2 6
LDN 1689 16 32 02.59 -25 05 21.5 0.007 25.2 6
LDN 111 17 15 09.98 -20 21 21.2 0.007 25.2 6
LDN 422 18 11 43.30 -08 09 14.8 0.007 25.2 6
LDN 543 19 06 40.70 -06 10 18.1 0.007 25.2 6
LDN 470 18 18 40.42 -05 43 44.4 0.007 25.2 6
LDN 877 20 14 17.18 +39 54 10.8 0.007 25.2 6
LDN 915 20 45 22.78 +43 05 59.3 0.007 25.2 6
LDN 1355 02 52 43.18 +69 02 17.5 0.007 25.2 6
LDN 1333 02 26 03.67 +75 28 32.2 0.007 25.2 6
LDN 1775 16 57 00.70 -22 49 38.3 0.008 28.8 6
LDN 438 18 14 12.10 -07 09 04.0 0.008 28.8 6
LDN 432 17 58 40.46 -05 45 11.5 0.008 28.8 6
LDN 503 18 29 09.12 -04 37 58.4 0.008 28.8 6
LDN 492 18 15 38.18 -03 48 57.6 0.008 28.8 6
LDN 763 19 18 36.48 +23 25 32.9 0.008 28.8 6
LDN 66 17 24 02.42 -23 32 43.1 0.009 32.4 6
LDN 262 18 02 59.38 -20 59 53.5 0.009 32.4 6
LDN 129 16 54 58.44 -16 19 46.6 0.009 32.4 6
LDN 1552 05 17 41.76 +26 03 10.4 0.009 32.4 6
LDN 1253 23 56 31.49 +58 31 41.9 0.009 32.4 6
LDN 1197 22 37 54.62 +58 55 37.2 0.009 32.4 6
LDN 1704 16 30 48.82 -23 46 26.4 0.01 36 6
LDN 1527 04 39 04.51 +26 15 52.9 0.01 36 6
LDN 1172 21 02 40.27 +67 41 56.0 0.01 36 6
LDN 216 17 37 57.46 -19 39 42.8 0.011 39.6 6
LDN 330 17 50 26.71 -14 16 48.0 0.011 39.6 6
LDN 648 18 39 18.89 +12 42 46.1 0.011 39.6 6
LDN 11 17 08 07.15 -22 53 51.4 0.012 43.2 6
LDN 466 18 19 40.92 -06 08 39.8 0.012 43.2 6
LDN 698 19 26 07.30 +13 06 03.2 0.012 43.2 6
LDN 1768 17 20 06.98 -26 52 00.1 0.013 46.8 6
LDN 1148 20 40 31.75 +67 20 45.2 0.015 54 6
LDN 1772 17 19 48.65 -26 38 01.7 0.016 57.6 6
LDN 1686 16 25 49.27 -24 19 46.6 0.016 57.6 6
LDN 323 18 15 31.63 -18 10 58.4 0.016 57.6 6
LDN 769 19 24 07.15 +23 05 55.3 0.016 57.6 6
LDN 1512 05 03 45.34 +32 47 10.3 0.016 57.6 6
LDN 1523 05 06 13.80 +31 43 59.9 0.017 61.2 6
LDN 239 18 33 24.05 -26 00 41.0 0.018 64.8 6
LDN 104 17 15 58.58 -20 48 17.6 0.019 68.4 6
LDN 1165 22 07 10.90 +59 04 41.5 0.019 68.4 6
LDN 1164 22 06 40.51 +59 09 40.3 0.019 68.4 6
LDN 173 17 17 13.49 -18 23 12.1 0.02 72 6
LDN 122 16 55 10.94 -16 44 45.6 0.02 72 6
LDN 1143 21 57 37.08 +58 59 20.8 0.02 72 6
LDN 31 16 49 55.68 -19 05 07.8 0.022 79.2 6
LDN 539 18 23 58.99 -01 04 21.0 0.022 79.2 6
LDN 567 19 04 08.81 -04 28 28.6 0.024 86.4 6
LDN 1759 16 52 06.84 -23 04 58.8 0.027 97.2 6
LDN 497 18 39 11.40 -06 37 15.2 0.027 97.2 6
LDN 1774 17 22 37.27 -27 00 49.3 0.029 104.4 6
LDN 255 16 47 44.76 -09 55 16.3 0.032 115.2 6
LDN 981 20 59 36.94 +50 11 44.9 0.033 118.8 6
LDN 588 18 36 04.27 -00 27 28.4 0.034 122.4 6
LDN 102 17 22 30.14 -21 52 49.8 0.035 126 6
LDN 1773 17 21 06.91 -26 47 56.0 0.036 129.6 6
LDN 7 17 28 36.36 -26 17 23.6 0.036 129.6 6
LDN 1696 16 28 49.42 -24 19 34.3 0.036 129.6 6
LDN 63 16 49 54.43 -18 05 07.8 0.037 133.2 6
LDN 1235 22 14 54.79 +73 24 58.0 0.037 133.2 6
LDN 74 17 38 04.97 -25 11 42.4 0.038 136.8 6
LDN 235 17 46 28.22 -20 11 05.6 0.038 136.8 6
LDN 483 18 17 39.36 -04 48 48.6 0.038 136.8 6
LDN 462 18 06 39.17 -04 39 36.7 0.041 147.6 6
LDN 15 17 04 24.07 -22 10 07.0 0.043 154.8 6
LDN 1551 04 31 23.86 +18 06 23.8 0.043 154.8 6
LDN 778 19 27 06.53 +23 41 07.4 0.043 154.8 6
LDN 1782 16 41 56.23 -19 45 41.0 0.047 169.2 6
LDN 1517 04 55 11.50 +30 34 46.2 0.051 183.6 6
LDN 158 16 47 49.58 -14 05 16.4 0.056 201.6 6
LDN 1757 16 31 55.66 -19 36 21.6 0.061 219.6 6
LDN 1627 05 46 33.74 +00 01 04.4 0.063 226.8 6
LDN 570 18 26 34.30 -00 28 09.5 0.066 237.6 6
LDN 1262 23 26 58.97 +74 16 31.1 0.066 237.6 6
LDN 429 18 16 43.49 -08 18 52.9 0.068 244.8 6
LDN 43 16 34 27.26 -15 50 11.4 0.07 252 6
LDN 581 19 07 26.16 -03 55 14.9 0.072 259.2 6
LDN 260 16 47 44.38 -09 35 16.4 0.074 266.4 6
LDN 100 17 15 58.68 -20 53 17.9 0.075 270 6
LDN 219 17 39 27.62 -19 46 36.1 0.084 302.4 6
LDN 65 17 12 59.93 -21 53 30.5 0.088 316.8 6
LDN 704 19 26 48.55 +13 46 05.9 0.097 349.2 6
LDN 1709 16 33 00.91 -23 46 17.4 0.099 356.4 6
LDN 694 19 40 40.06 +10 57 01.4 0.109 392.4 6
LDN 1544 05 04 04.18 +25 14 08.5 0.109 392.4 6
LDN 1535 04 35 31.20 +23 54 07.2 0.111 399.6 6
LDN 1622 05 54 36.07 +02 00 29.2 0.122 439.2 6
LDN 162 16 49 07.80 -14 15 10.8 0.124 446.4 6
LDN 530 18 49 39.22 -04 46 30.4 0.124 446.4 6
LDN 513 18 10 35.54 -01 33 19.4 0.127 457.2 6
LDN 204 16 47 47.26 -12 05 16.4 0.167 601.2 6
LDN 557 18 38 35.81 -01 47 17.5 0.181 651.6 6
LDN 673 19 20 51.26 +11 15 41.4 0.199 716.4 6
LDN 1506 04 20 02.16 +25 17 09.6 0.334 1202.4 6

LDN 199 18 15 05.47 -25 27 00.7 0.001 3.6 5
LDN 210 18 09 09.65 -24 07 26.8 0.001 3.6 5
LDN 213 18 09 03.48 -24 00 27.0 0.001 3.6 5
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LDN 1644 06 07 39.29 -05 30 28.1 0.007 25.2 5
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LDN 680 19 44 42.65 +08 38 17.5 0.007 25.2 5
LDN 1416 04 40 00.02 +54 05 51.0 0.007 25.2 5
LDN 1192 22 33 53.35 +58 35 30.8 0.007 25.2 5
LDN 1100 20 34 47.04 +64 00 25.2 0.007 25.2 5
LDN 1703 17 18 44.88 -32 06 06.5 0.008 28.8 5
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LDN 61 17 31 22.46 -24 55 11.6 0.008 28.8 5
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LDN 1227 23 10 05.81 +62 19 17.8 0.008 28.8 5
LDN 81 17 25 01.70 -23 00 38.9 0.009 32.4 5
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LDN 1450 03 29 35.69 +31 20 16.8 0.009 32.4 5
LDN 987 21 00 48.24 +50 40 48.7 0.009 32.4 5
LDN 1421 04 32 52.78 +52 01 19.9 0.009 32.4 5
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LDN 95 17 19 59.83 -21 41 00.6 0.01 36 5
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LDN 723 19 18 11.78 +19 13 30.7 0.01 36 5
LDN 782 19 28 06.24 +23 56 11.8 0.01 36 5
LDN 971 21 00 50.98 +49 18 49.0 0.01 36 5
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LDN 1119 21 13 11.26 +61 42 26.6 0.01 36 5
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LDN 1582 05 31 48.43 +12 32 09.2 0.011 39.6 5
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LDN 1024 21 42 16.37 +47 31 44.4 0.011 39.6 5
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LDN 1211 22 46 53.74 +62 10 50.5 0.011 39.6 5
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LDN 1616 05 06 29.78 -03 26 02.8 0.016 57.6 5
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LDN 121 16 39 49.30 -14 00 49.3 0.017 61.2 5
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LDN 1068 21 06 16.73 +57 07 05.9 0.027 97.2 5
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LDN 587 18 39 33.70 +00 02 46.7 0.093 334.8 5
LDN 520 18 21 36.43 -02 18 31.3 0.097 349.2 5
LDN 1471 03 47 57.72 +32 54 11.9 0.097 349.2 5
LDN 1744 16 39 59.30 -22 15 49.0 0.099 356.4 5
LDN 941 20 56 44.40 +45 49 35.8 0.105 378 5
LDN 1710 17 20 44.69 -31 56 57.8 0.106 381.6 5
LDN 185 17 31 58.20 -20 17 08.9 0.108 388.8 5
LDN 1035 21 44 40.70 +47 43 50.2 0.109 392.4 5
LDN 1082 20 51 08.28 +60 11 19.0 0.111 399.6 5
LDN 950 21 00 31.85 +46 36 47.5 0.112 403.2 5
LDN 761 19 36 10.18 +21 06 43.9 0.116 417.6 5
LDN 1749 17 23 10.27 -29 02 47.0 0.117 421.2 5
LDN 1498 04 11 01.20 +24 57 44.6 0.118 424.8 5
LDN 1468 03 40 06.89 +31 24 40.0 0.12 432 5
LDN 1407 04 29 59.06 +54 16 31.8 0.13 468 5
LDN 717 19 16 13.22 +18 00 22.7 0.147 529.2 5
LDN 604 18 51 33.50 +00 13 38.3 0.152 547.2 5
LDN 191 16 47 48.02 -12 45 16.2 0.158 568.8 5
LDN 437 18 20 13.08 -07 58 37.6 0.163 586.8 5
LDN 1399 04 24 00.74 +55 06 55.4 0.163 586.8 5
LDN 1394 04 17 00.05 +55 17 23.3 0.184 662.4 5
LDN 684 19 21 49.97 +12 25 45.5 0.185 666 5
LDN 1251 22 36 03.05 +75 15 34.9 0.195 702 5
LDN 978 21 01 08.28 +49 41 49.6 0.2 720 5
LDN 1681 16 27 01.92 -24 46 41.5 0.206 741.6 5
LDN 564 18 37 35.14 -01 12 22.0 0.208 748.8 5
LDN 134 15 53 38.26 -04 38 49.9 0.22 792 5
LDN 636 19 06 28.54 +04 39 41.4 0.22 792 5
LDN 1529 04 32 01.73 +24 26 21.5 0.223 802.8 5
LDN 183 15 53 54.77 -03 08 48.8 0.24 864 5
LDN 192 17 30 57.53 -19 47 13.2 0.278 1000.8 5
LDN 582 18 52 35.98 -01 56 17.5 0.283 1018.8 5
LDN 1756 17 16 07.63 -27 23 17.5 0.285 1026 5
LDN 1746 17 11 07.46 -27 23 38.8 0.306 1101.6 5
LDN 1524 04 28 01.75 +24 36 37.4 0.324 1166.4 5
LDN 1470 03 43 07.75 +31 49 29.3 0.403 1450.8 5
LDN 1719 16 19 55.78 -20 07 09.5 0.61 2196 5
LDN 617 18 57 32.54 +01 04 03.7 0.745 2682 5
LDN 406 18 25 47.62 -11 48 13.7 0.746 2685.6 5
LDN 1534 04 40 03.67 +25 35 48.8 0.87 3132 5
LDN 548 18 49 37.97 -03 41 30.1 1 3600 5
LDN 1712 16 38 02.02 -24 25 57.0 1.56 5616 5
LDN 1495 04 18 05.11 +27 37 17.4 2.6 9360 5

Talk:Lynds Target Selection

2008-01-14T19:34:44Z

Mcdonald:

Dear Lynds

I hope you all made it home safe and sound.

Wednesday night as I was driving home the sky was GREAT. Very dark and the
Milky Way sure stood out. I looked but did not see any nebula. :)

Using http://heasarc.gsfc.nasa.gov I did a search and got a list of Lynds nebula
with ra, dec, cloud area in degrees squared and rating of opacity.

I placed list on excel and sorted by opacity and then area.

Hopefully the list will be below for all 6 and 5 lens nebula.

Does any one know about what area we can look at in 1 hour?

later
david

name, ra, dec, cloud area (degree squared), area in arcmin squared I think,
opacity

LDN 53 17 23 08.90 -23 54 47.2 0.001 3.6 6
LDN 233 17 45 03.98 -20 01 11.6 0.001 3.6 6
LDN 222 17 41 09.65 -19 46 28.9 0.001 3.6 6
LDN 223 17 40 45.55 -19 42 30.6 0.001 3.6 6
LDN 231 17 40 21.31 -19 31 32.2 0.001 3.6 6
LDN 307 18 06 14.02 -18 26 39.1 0.001 3.6 6
LDN 308 18 06 43.99 -18 25 36.8 0.001 3.6 6
LDN 328 18 16 55.39 -17 59 52.4 0.001 3.6 6
LDN 372 18 30 34.82 -16 03 52.9 0.001 3.6 6
LDN 860 20 04 52.13 +36 03 36.0 0.001 3.6 6
LDN 953 21 21 23.38 +43 22 49.1 0.001 3.6 6
LDN 917 20 40 14.09 +44 08 42.0 0.001 3.6 6
LDN 1021 21 21 35.04 +51 01 49.8 0.001 3.6 6
LDN 1166 22 05 39.19 +59 34 38.3 0.001 3.6 6
LDN 1233 23 16 27.19 +62 20 23.3 0.001 3.6 6
LDN 228 17 40 45.43 -19 37 30.4 0.002 7.2 6
LDN 229 17 40 09.29 -19 30 33.1 0.002 7.2 6
LDN 495 18 38 53.45 -06 39 16.6 0.002 7.2 6
LDN 490 18 15 08.18 -03 48 59.8 0.002 7.2 6
LDN 709 19 14 15.07 +16 25 14.5 0.002 7.2 6
LDN 944 21 17 40.73 +43 17 38.4 0.002 7.2 6
LDN 1389 04 04 32.83 +56 54 11.5 0.002 7.2 6
LDN 1111 21 39 32.45 +57 53 38.0 0.002 7.2 6
LDN 1246 23 25 12.84 +63 36 29.9 0.002 7.2 6
LDN 108 18 10 09.72 -28 19 22.4 0.003 10.8 6
LDN 55 17 23 02.86 -23 52 47.6 0.003 10.8 6
LDN 57 17 22 38.64 -23 43 49.1 0.003 10.8 6
LDN 226 17 40 33.48 -19 39 31.3 0.003 10.8 6
LDN 509 18 53 42.10 -07 18 13.0 0.003 10.8 6
LDN 675 19 23 57.53 +11 05 54.2 0.003 10.8 6
LDN 928 20 41 01.44 +44 35 44.9 0.003 10.8 6
LDN 1103 21 41 41.90 +56 43 43.3 0.003 10.8 6
LDN 310 18 06 55.90 -18 21 36.0 0.004 14.4 6
LDN 603 18 46 20.74 +00 53 15.7 0.004 14.4 6
LDN 918 20 40 56.30 +44 05 44.5 0.004 14.4 6
LDN 1014 21 24 01.58 +49 59 56.8 0.004 14.4 6
LDN 1234 23 17 09.50 +62 24 23.8 0.004 14.4 6
LDN 1357 02 52 30.05 +68 52 18.1 0.004 14.4 6
LDN 416 18 25 16.22 -10 38 15.7 0.005 18 6
LDN 531 19 06 05.47 -06 50 20.8 0.005 18 6
LDN 502 18 07 29.90 -01 51 32.8 0.005 18 6
LDN 663 19 36 55.68 +07 33 46.4 0.005 18 6
LDN 771 19 20 42.43 +23 31 41.5 0.005 18 6
LDN 881 20 17 47.78 +39 49 23.9 0.005 18 6
LDN 951 21 21 05.42 +43 18 48.2 0.005 18 6
LDN 922 20 38 43.03 +44 35 37.0 0.005 18 6
LDN 1049 20 42 14.09 +57 30 49.7 0.005 18 6
LDN 52 17 32 11.09 -25 21 07.9 0.006 21.6 6
LDN 436 18 14 42.41 -07 24 01.8 0.006 21.6 6
LDN 460 17 58 38.11 -03 45 11.9 0.006 21.6 6
LDN 676 19 21 33.00 +11 30 44.3 0.006 21.6 6
LDN 677 19 22 20.95 +11 33 47.5 0.006 21.6 6
LDN 1185 22 29 20.52 +59 05 23.3 0.006 21.6 6
LDN 1155 20 43 31.08 +67 40 55.2 0.006 21.6 6
LDN 1358 02 55 34.85 +69 22 09.1 0.006 21.6 6
LDN 25 17 32 30.29 -26 11 06.7 0.007 25.2 6
LDN 1689 16 32 02.59 -25 05 21.5 0.007 25.2 6
LDN 111 17 15 09.98 -20 21 21.2 0.007 25.2 6
LDN 422 18 11 43.30 -08 09 14.8 0.007 25.2 6
LDN 543 19 06 40.70 -06 10 18.1 0.007 25.2 6
LDN 470 18 18 40.42 -05 43 44.4 0.007 25.2 6
LDN 877 20 14 17.18 +39 54 10.8 0.007 25.2 6
LDN 915 20 45 22.78 +43 05 59.3 0.007 25.2 6
LDN 1355 02 52 43.18 +69 02 17.5 0.007 25.2 6
LDN 1333 02 26 03.67 +75 28 32.2 0.007 25.2 6
LDN 1775 16 57 00.70 -22 49 38.3 0.008 28.8 6
LDN 438 18 14 12.10 -07 09 04.0 0.008 28.8 6
LDN 432 17 58 40.46 -05 45 11.5 0.008 28.8 6
LDN 503 18 29 09.12 -04 37 58.4 0.008 28.8 6
LDN 492 18 15 38.18 -03 48 57.6 0.008 28.8 6
LDN 763 19 18 36.48 +23 25 32.9 0.008 28.8 6
LDN 66 17 24 02.42 -23 32 43.1 0.009 32.4 6
LDN 262 18 02 59.38 -20 59 53.5 0.009 32.4 6
LDN 129 16 54 58.44 -16 19 46.6 0.009 32.4 6
LDN 1552 05 17 41.76 +26 03 10.4 0.009 32.4 6
LDN 1253 23 56 31.49 +58 31 41.9 0.009 32.4 6
LDN 1197 22 37 54.62 +58 55 37.2 0.009 32.4 6
LDN 1704 16 30 48.82 -23 46 26.4 0.01 36 6
LDN 1527 04 39 04.51 +26 15 52.9 0.01 36 6
LDN 1172 21 02 40.27 +67 41 56.0 0.01 36 6
LDN 216 17 37 57.46 -19 39 42.8 0.011 39.6 6
LDN 330 17 50 26.71 -14 16 48.0 0.011 39.6 6
LDN 648 18 39 18.89 +12 42 46.1 0.011 39.6 6
LDN 11 17 08 07.15 -22 53 51.4 0.012 43.2 6
LDN 466 18 19 40.92 -06 08 39.8 0.012 43.2 6
LDN 698 19 26 07.30 +13 06 03.2 0.012 43.2 6
LDN 1768 17 20 06.98 -26 52 00.1 0.013 46.8 6
LDN 1148 20 40 31.75 +67 20 45.2 0.015 54 6
LDN 1772 17 19 48.65 -26 38 01.7 0.016 57.6 6
LDN 1686 16 25 49.27 -24 19 46.6 0.016 57.6 6
LDN 323 18 15 31.63 -18 10 58.4 0.016 57.6 6
LDN 769 19 24 07.15 +23 05 55.3 0.016 57.6 6
LDN 1512 05 03 45.34 +32 47 10.3 0.016 57.6 6
LDN 1523 05 06 13.80 +31 43 59.9 0.017 61.2 6
LDN 239 18 33 24.05 -26 00 41.0 0.018 64.8 6
LDN 104 17 15 58.58 -20 48 17.6 0.019 68.4 6
LDN 1165 22 07 10.90 +59 04 41.5 0.019 68.4 6
LDN 1164 22 06 40.51 +59 09 40.3 0.019 68.4 6
LDN 173 17 17 13.49 -18 23 12.1 0.02 72 6
LDN 122 16 55 10.94 -16 44 45.6 0.02 72 6
LDN 1143 21 57 37.08 +58 59 20.8 0.02 72 6
LDN 31 16 49 55.68 -19 05 07.8 0.022 79.2 6
LDN 539 18 23 58.99 -01 04 21.0 0.022 79.2 6
LDN 567 19 04 08.81 -04 28 28.6 0.024 86.4 6
LDN 1759 16 52 06.84 -23 04 58.8 0.027 97.2 6
LDN 497 18 39 11.40 -06 37 15.2 0.027 97.2 6
LDN 1774 17 22 37.27 -27 00 49.3 0.029 104.4 6
LDN 255 16 47 44.76 -09 55 16.3 0.032 115.2 6
LDN 981 20 59 36.94 +50 11 44.9 0.033 118.8 6
LDN 588 18 36 04.27 -00 27 28.4 0.034 122.4 6
LDN 102 17 22 30.14 -21 52 49.8 0.035 126 6
LDN 1773 17 21 06.91 -26 47 56.0 0.036 129.6 6
LDN 7 17 28 36.36 -26 17 23.6 0.036 129.6 6
LDN 1696 16 28 49.42 -24 19 34.3 0.036 129.6 6
LDN 63 16 49 54.43 -18 05 07.8 0.037 133.2 6
LDN 1235 22 14 54.79 +73 24 58.0 0.037 133.2 6
LDN 74 17 38 04.97 -25 11 42.4 0.038 136.8 6
LDN 235 17 46 28.22 -20 11 05.6 0.038 136.8 6
LDN 483 18 17 39.36 -04 48 48.6 0.038 136.8 6
LDN 462 18 06 39.17 -04 39 36.7 0.041 147.6 6
LDN 15 17 04 24.07 -22 10 07.0 0.043 154.8 6
LDN 1551 04 31 23.86 +18 06 23.8 0.043 154.8 6
LDN 778 19 27 06.53 +23 41 07.4 0.043 154.8 6
LDN 1782 16 41 56.23 -19 45 41.0 0.047 169.2 6
LDN 1517 04 55 11.50 +30 34 46.2 0.051 183.6 6
LDN 158 16 47 49.58 -14 05 16.4 0.056 201.6 6
LDN 1757 16 31 55.66 -19 36 21.6 0.061 219.6 6
LDN 1627 05 46 33.74 +00 01 04.4 0.063 226.8 6
LDN 570 18 26 34.30 -00 28 09.5 0.066 237.6 6
LDN 1262 23 26 58.97 +74 16 31.1 0.066 237.6 6
LDN 429 18 16 43.49 -08 18 52.9 0.068 244.8 6
LDN 43 16 34 27.26 -15 50 11.4 0.07 252 6
LDN 581 19 07 26.16 -03 55 14.9 0.072 259.2 6
LDN 260 16 47 44.38 -09 35 16.4 0.074 266.4 6
LDN 100 17 15 58.68 -20 53 17.9 0.075 270 6
LDN 219 17 39 27.62 -19 46 36.1 0.084 302.4 6
LDN 65 17 12 59.93 -21 53 30.5 0.088 316.8 6
LDN 704 19 26 48.55 +13 46 05.9 0.097 349.2 6
LDN 1709 16 33 00.91 -23 46 17.4 0.099 356.4 6
LDN 694 19 40 40.06 +10 57 01.4 0.109 392.4 6
LDN 1544 05 04 04.18 +25 14 08.5 0.109 392.4 6
LDN 1535 04 35 31.20 +23 54 07.2 0.111 399.6 6
LDN 1622 05 54 36.07 +02 00 29.2 0.122 439.2 6
LDN 162 16 49 07.80 -14 15 10.8 0.124 446.4 6
LDN 530 18 49 39.22 -04 46 30.4 0.124 446.4 6
LDN 513 18 10 35.54 -01 33 19.4 0.127 457.2 6
LDN 204 16 47 47.26 -12 05 16.4 0.167 601.2 6
LDN 557 18 38 35.81 -01 47 17.5 0.181 651.6 6
LDN 673 19 20 51.26 +11 15 41.4 0.199 716.4 6
LDN 1506 04 20 02.16 +25 17 09.6 0.334 1202.4 6

LDN 199 18 15 05.47 -25 27 00.7 0.001 3.6 5
LDN 210 18 09 09.65 -24 07 26.8 0.001 3.6 5
LDN 213 18 09 03.48 -24 00 27.0 0.001 3.6 5
LDN 214 18 09 03.43 -23 58 27.1 0.001 3.6 5
LDN 87 17 18 35.95 -21 48 06.5 0.001 3.6 5
LDN 105 16 36 25.13 -13 57 03.2 0.001 3.6 5
LDN 106 16 36 43.15 -13 57 02.2 0.001 3.6 5
LDN 598 18 46 44.93 +00 43 17.4 0.001 3.6 5
LDN 601 18 46 44.83 +00 48 17.6 0.001 3.6 5
LDN 635 19 09 29.16 +04 07 54.1 0.001 3.6 5
LDN 656 19 21 18.43 +08 27 43.2 0.001 3.6 5
LDN 1581 05 29 24.02 +12 12 19.4 0.001 3.6 5
LDN 948 21 20 41.42 +43 14 47.0 0.001 3.6 5
LDN 902 20 21 42.38 +43 19 37.9 0.001 3.6 5
LDN 946 21 18 58.75 +43 27 42.1 0.001 3.6 5
LDN 952 21 20 29.06 +43 27 46.4 0.001 3.6 5
LDN 919 20 32 40.68 +45 17 16.4 0.001 3.6 5
LDN 920 20 32 40.58 +45 20 16.4 0.001 3.6 5
LDN 997 21 26 36.14 +47 41 03.5 0.001 3.6 5
LDN 1001 21 27 18.31 +47 41 05.6 0.001 3.6 5
LDN 1423 04 44 58.34 +53 20 30.5 0.001 3.6 5
LDN 1064 21 13 28.85 +55 37 27.1 0.001 3.6 5
LDN 1080 21 21 29.23 +56 32 49.9 0.001 3.6 5
LDN 1120 21 47 37.18 +57 08 57.8 0.001 3.6 5
LDN 1118 21 46 36.65 +57 12 55.4 0.001 3.6 5
LDN 1380 03 15 42.50 +60 09 05.0 0.001 3.6 5
LDN 1378 03 14 54.89 +60 20 07.8 0.001 3.6 5
LDN 1255 23 53 29.76 +60 31 41.5 0.001 3.6 5
LDN 1340 02 30 44.26 +72 57 19.4 0.001 3.6 5
LDN 1724 17 31 45.46 -32 13 10.2 0.002 7.2 5
LDN 1735 17 32 08.66 -31 43 08.4 0.002 7.2 5
LDN 1727 17 12 10.20 -29 13 34.3 0.002 7.2 5
LDN 196 18 10 04.85 -24 59 22.6 0.002 7.2 5
LDN 23 17 17 14.83 -23 58 12.4 0.002 7.2 5
LDN 101 17 21 48.02 -21 47 52.8 0.002 7.2 5
LDN 551 18 57 50.78 -04 25 55.2 0.002 7.2 5
LDN 504 18 18 37.39 -03 08 44.5 0.002 7.2 5
LDN 605 18 46 44.74 +00 53 17.5 0.002 7.2 5
LDN 774 19 22 54.65 +23 25 50.5 0.002 7.2 5
LDN 853 20 06 53.59 +35 13 43.3 0.002 7.2 5
LDN 882 20 19 18.26 +39 39 29.2 0.002 7.2 5
LDN 979 21 39 27.34 +43 21 37.1 0.002 7.2 5
LDN 921 20 33 10.80 +45 16 18.1 0.002 7.2 5
LDN 926 20 35 23.09 +45 19 25.7 0.002 7.2 5
LDN 925 20 33 40.75 +45 20 20.0 0.002 7.2 5
LDN 929 20 35 41.11 +45 20 26.9 0.002 7.2 5
LDN 930 20 36 53.35 +45 20 30.8 0.002 7.2 5
LDN 1420 04 32 53.50 +52 16 19.6 0.002 7.2 5
LDN 1077 21 37 40.70 +53 43 32.9 0.002 7.2 5
LDN 1412 04 37 00.65 +54 26 03.1 0.002 7.2 5
LDN 1115 21 46 37.15 +56 58 55.2 0.002 7.2 5
LDN 1113 21 44 35.93 +57 11 50.3 0.002 7.2 5
LDN 1179 22 27 19.73 +59 02 19.7 0.002 7.2 5
LDN 1142 21 56 36.48 +59 04 18.8 0.002 7.2 5
LDN 1379 03 15 31.15 +60 21 05.8 0.002 7.2 5
LDN 1317 01 23 04.92 +61 50 39.5 0.002 7.2 5
LDN 1230 23 14 08.30 +62 01 21.4 0.002 7.2 5
LDN 1294 00 42 20.14 +62 16 26.4 0.002 7.2 5
LDN 1193 22 14 36.86 +62 24 56.5 0.002 7.2 5
LDN 1301 00 43 45.10 +62 27 25.2 0.002 7.2 5
LDN 1094 20 32 46.30 +64 00 18.4 0.002 7.2 5
LDN 1263 23 57 31.42 +64 50 42.0 0.002 7.2 5
LDN 1171 20 53 31.99 +68 19 27.5 0.002 7.2 5
LDN 1738 17 32 56.66 -31 43 05.2 0.003 10.8 5
LDN 1715 17 12 11.71 -30 13 34.3 0.003 10.8 5
LDN 230 18 09 02.71 -23 27 27.0 0.003 10.8 5
LDN 417 18 25 16.18 -10 36 15.8 0.003 10.8 5
LDN 430 18 11 42.67 -07 37 14.9 0.003 10.8 5
LDN 518 18 53 11.30 -06 36 15.1 0.003 10.8 5
LDN 479 18 19 09.74 -05 08 42.0 0.003 10.8 5
LDN 469 18 13 27.70 -05 06 06.8 0.003 10.8 5
LDN 883 20 19 48.34 +39 39 31.0 0.003 10.8 5
LDN 956 21 11 35.35 +45 58 21.0 0.003 10.8 5
LDN 960 21 08 32.66 +47 10 12.0 0.003 10.8 5
LDN 1019 21 20 59.02 +50 56 48.1 0.003 10.8 5
LDN 1016 21 19 46.58 +51 00 44.6 0.003 10.8 5
LDN 1437 04 59 20.18 +52 04 30.4 0.003 10.8 5
LDN 1410 04 36 01.85 +54 51 07.2 0.003 10.8 5
LDN 1403 04 28 31.78 +55 11 37.7 0.003 10.8 5
LDN 1062 21 13 29.06 +55 32 26.9 0.003 10.8 5
LDN 1123 21 39 31.03 +58 28 37.9 0.003 10.8 5
LDN 1351 02 10 43.22 +60 49 07.7 0.003 10.8 5
LDN 1339 01 54 34.08 +62 30 43.2 0.003 10.8 5
LDN 1326 01 30 41.30 +63 05 27.6 0.003 10.8 5
LDN 1325 01 29 52.87 +63 05 29.0 0.003 10.8 5
LDN 1168 20 56 37.75 +67 36 37.1 0.003 10.8 5
LDN 1219 22 11 35.54 +70 59 51.0 0.003 10.8 5
LDN 1685 17 09 14.57 -32 08 47.0 0.004 14.4 5
LDN 36 17 28 40.82 -25 12 23.0 0.004 14.4 5
LDN 58 17 30 28.46 -24 55 15.6 0.004 14.4 5
LDN 24 17 17 32.93 -24 01 11.3 0.004 14.4 5
LDN 4 17 02 30.05 -22 12 15.1 0.004 14.4 5
LDN 427 18 26 45.22 -09 48 09.4 0.004 14.4 5
LDN 498 18 39 59.42 -06 39 11.9 0.004 14.4 5
LDN 500 18 16 37.61 -03 18 52.9 0.004 14.4 5
LDN 1614 05 35 32.98 -00 38 07.8 0.004 14.4 5
LDN 1491 04 04 38.45 +26 17 09.2 0.004 14.4 5
LDN 1464 04 00 40.61 +36 40 24.6 0.004 14.4 5
LDN 879 20 20 49.01 +39 19 34.7 0.004 14.4 5
LDN 1117 21 38 31.06 +58 18 35.3 0.004 14.4 5
LDN 1127 21 40 55.37 +58 33 41.4 0.004 14.4 5
LDN 1169 22 07 09.48 +59 44 41.6 0.004 14.4 5
LDN 1385 03 21 01.08 +59 48 47.5 0.004 14.4 5
LDN 1322 01 24 16.49 +61 15 37.8 0.004 14.4 5
LDN 1182 22 13 07.32 +61 54 53.6 0.004 14.4 5
LDN 1229 23 14 08.33 +61 59 21.5 0.004 14.4 5
LDN 1291 00 42 13.85 +62 01 26.4 0.004 14.4 5
LDN 1191 22 14 06.62 +62 24 55.4 0.004 14.4 5
LDN 1202 22 26 41.45 +63 05 19.0 0.004 14.4 5
LDN 1723 17 31 15.41 -32 12 12.6 0.005 18 5
LDN 1718 17 15 11.83 -30 14 21.5 0.005 18 5
LDN 80 17 39 04.87 -25 06 38.2 0.005 18 5
LDN 92 17 18 59.86 -21 43 04.8 0.005 18 5
LDN 89 17 18 29.81 -21 42 06.8 0.005 18 5
LDN 514 18 52 53.69 -06 56 16.4 0.005 18 5
LDN 576 18 31 28.18 -00 22 48.4 0.005 18 5
LDN 702 19 36 26.47 +12 16 44.8 0.005 18 5
LDN 725 19 28 13.42 +18 10 12.0 0.005 18 5
LDN 753 19 48 14.09 +18 17 31.6 0.005 18 5
LDN 903 20 08 37.06 +45 03 50.4 0.005 18 5
LDN 1047 21 48 05.42 +47 51 58.7 0.005 18 5
LDN 1417 04 40 59.64 +53 55 46.9 0.005 18 5
LDN 1406 04 38 03.98 +55 23 58.9 0.005 18 5
LDN 1299 00 45 04.20 +55 44 24.0 0.005 18 5
LDN 1186 22 13 37.06 +62 07 54.5 0.005 18 5
LDN 1178 22 09 04.34 +62 19 45.5 0.005 18 5
LDN 1239 23 12 20.18 +66 04 19.6 0.005 18 5
LDN 1157 20 39 27.17 +68 00 41.8 0.005 18 5
LDN 1734 17 32 26.90 -31 52 07.3 0.006 21.6 5
LDN 1714 17 12 11.83 -30 18 34.2 0.006 21.6 5
LDN 1794 17 26 24.82 -26 38 33.0 0.006 21.6 5
LDN 402 18 29 48.70 -12 42 56.2 0.006 21.6 5
LDN 467 18 18 58.70 -05 58 43.0 0.006 21.6 5
LDN 549 19 02 09.70 -05 15 37.1 0.006 21.6 5
LDN 545 18 56 45.17 -04 46 00.1 0.006 21.6 5
LDN 687 19 38 34.61 +10 24 53.3 0.006 21.6 5
LDN 942 21 16 22.58 +43 12 34.9 0.006 21.6 5
LDN 961 21 08 50.62 +47 14 12.8 0.006 21.6 5
LDN 964 21 09 32.54 +47 22 14.9 0.006 21.6 5
LDN 1424 04 44 58.08 +53 15 30.6 0.006 21.6 5
LDN 1044 20 41 14.30 +57 20 46.3 0.006 21.6 5
LDN 1126 21 39 30.84 +58 33 37.8 0.006 21.6 5
LDN 1381 03 16 31.01 +60 13 02.3 0.006 21.6 5
LDN 1213 22 31 38.62 +65 25 27.5 0.006 21.6 5
LDN 1173 21 04 41.28 +67 42 02.2 0.006 21.6 5
LDN 93 18 02 45.00 -27 49 54.8 0.007 25.2 5
LDN 1767 17 18 36.77 -26 45 06.8 0.007 25.2 5
LDN 109 17 39 03.46 -24 06 38.2 0.007 25.2 5
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LDN 1733 17 12 27.89 -29 00 33.1 0.018 64.8 5
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LDN 982 21 02 26.18 +49 54 53.6 0.019 68.4 5
LDN 1433 04 50 54.82 +51 55 05.9 0.019 68.4 5
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LDN 1690 16 26 48.96 -24 02 42.4 0.02 72 5
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LDN 1275 00 06 37.42 +67 26 42.0 0.02 72 5
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LDN 1215 22 51 56.50 +62 05 57.1 0.021 75.6 5
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LDN 451 18 21 42.07 -07 08 31.2 0.022 79.2 5
LDN 501 18 17 37.58 -03 18 48.6 0.022 79.2 5
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LDN 21 17 29 05.88 -25 56 21.5 0.023 82.8 5
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LDN 729 19 40 20.93 +17 17 00.6 0.023 82.8 5
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LDN 1065 21 07 24.62 +56 32 09.2 0.023 82.8 5
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LDN 1489 04 04 44.69 +26 28 08.8 0.027 97.2 5
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LDN 1017 21 25 19.63 +50 10 00.1 0.027 97.2 5
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LDN 1068 21 06 16.73 +57 07 05.9 0.027 97.2 5
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LDN 896 20 41 51.55 +39 40 47.3 0.028 100.8 5
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LDN 1295 00 44 50.02 +52 26 24.4 0.029 104.4 5
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LDN 1462 04 00 17.02 +36 58 26.4 0.03 108 5
LDN 1725 17 19 12.19 -30 23 04.2 0.032 115.2 5
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LDN 1053 20 59 24.34 +55 41 44.5 0.033 118.8 5
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LDN 1619 06 04 38.59 +04 09 45.4 0.038 136.8 5
LDN 302 17 57 31.01 -17 40 17.4 0.04 144 5
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LDN 1013 21 00 30.36 +53 21 47.9 0.048 172.8 5
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LDN 1547 05 16 06.19 +26 23 17.5 0.049 176.4 5
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LDN 990 20 58 52.51 +51 16 42.6 0.051 183.6 5
LDN 1563 05 01 49.56 +13 49 17.8 0.052 187.2 5
LDN 83 16 34 19.44 -14 16 11.6 0.056 201.6 5
LDN 1583 05 28 47.81 +12 02 22.2 0.057 205.2 5
LDN 1594 05 44 44.28 +09 01 12.7 0.059 212.4 5
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LDN 1598 05 52 25.51 +08 20 39.1 0.072 259.2 5
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LDN 1534 04 40 03.67 +25 35 48.8 0.87 3132 5
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