Notes on SEDs from BRC27 - Revision history

Rebull at 04:46, 14 December 2011

2011-12-14T04:46:12Z

Rebull: /* second pass, 10 Nov */

2011-11-11T22:06:45Z

second pass, 10 Nov

Rebull at 21:34, 11 November 2011

2011-11-11T21:34:19Z

Rebull: /* second pass, 10 Nov */

2011-11-11T21:34:07Z

second pass, 10 Nov

Rebull: /* second pass, 10 Nov */

2011-11-11T21:15:44Z

second pass, 10 Nov

Rebull: /* second pass, 10 Nov */

2011-11-11T21:00:07Z

second pass, 10 Nov

Rebull: /* second pass, 10 Nov */

2011-11-11T20:27:05Z

second pass, 10 Nov

Rebull: /* second pass, 10 Nov */

2011-11-11T17:56:37Z

second pass, 10 Nov

Rebull: /* second pass, 10 Nov */

2011-11-11T17:55:33Z

second pass, 10 Nov

Rebull: /* second pass, 10 Nov */

2011-11-11T17:48:48Z

second pass, 10 Nov

← Older revision		Revision as of 04:46, 14 December 2011
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	OK! so now, making a new catalog with the whole batch.		OK! so now, making a new catalog with the whole batch.
		+
		+	=Notes from 13 Dec=
		+
		+	looking at location in images. pretty happy with rejects. 070349.6-112346 seems to be a legitimate source, ah, but with a really small excess. nevermind. happy to drop this one. what about the bright source near 07:03:54 -11:23:42? ah, it has no excess to speak of. could still be a member, but we can't tell from the data we have.
		+
		+	locations in CMDs look pretty good. lots of low-excess sources from known YSO sample, makes plots look odd. would really like to see the optical CMD!!

@@ Line 129: / Line 129: @@
 *070408.1-112313 - ogura 21+23: - problem child -
 *070408.1-112309 - ogura 23:/chauhan 98 - problem child - only 2 two mass, what happened to 3rd.
+*070409.9-112316 - wiram23/ogura25/chau100 - nice one, no changes
-STOPPPED HERE
+Off the problem child list - Gregorio 76 (wasn't in catalog), Shevchenko 107 (wasn't in catalog), and Shevchenko 111=Gregorio81 (last one above) are all part of some bright nebulosity, in regions where we only have 2 bands of IRAC. The first two may be hard to tie to individual sources, as the region is bright and complex.  As long as I'm in the mode of patching flux densities, I went ahead and did these too.
+OK!  so now, making a new catalog with the whole batch.

@@ Line 50: / Line 50: @@
 *070407.9-112311 - ogura 21: - icky? check photometry - make sure that there is good photometry actually of this source.
 *070408.0-112354 - ogura 22 - nice one. worry about src conf m24
-*070508.1-112313 - ogura 21+23: - icky? check photometry - make sure that there is good photometry actually of this source.
+*070408.1-112313 - ogura 21+23: - icky? check photometry - make sure that there is good photometry actually of this source.
 *070408.1-112309 - ogura 23:, chauhan 98 - check photometry - make sure that there is good photometry actually of this source. only 2 two mass, what happened to 3rd.
 *070409.9-112316 - wiram23/ogura25/chau100 - nice one

@@ Line 115: / Line 115: @@
 *070405.1-112313 - ogura15/chauhan 88 - nice, no changes. WISE is confused, again.
 *070405.5-112337 - original note says "check irac photom all bands - iffy. likely bad photometry." indeed horrifically faint i3i4. xls notes agree. Redone photometry has ridiculous errors. --> DROP THIS as not likely real.
-*070405.6-112354 - original notes say "drop?? check for why no 2mass, is it in the catalog but with bad photqual flags?" searching 2mass catalog, it's definitely not there. in the 2mass images, it's a very faint blip, consistent with background noise. this is off the edge of the BRC, starting to get into more liklihood that it is background AGN. redone i3 brings that into line. still quite worrisome that no JHK. will be interesting to see if there are optical data to go with this one. still a "drop??" -- keep for now.
+*070405.6-112354 - original notes say "drop?? check for why no 2mass, is it in the catalog but with bad photqual flags?" searching 2mass catalog, it's definitely not there. in the 2mass images, it's a very faint blip, consistent with background noise. this is off the edge of the BRC, starting to get into more liklihood that it is background AGN. redone i3 brings that into line. still quite worrisome that no JHK. will be interesting to see if there are optical data to go with this one. still a "drop??" -- keep for now. xls notes say i3i4 faint.
 *070405.7-112123 - still just so-so. still a "drop??", keep for now, wait for optical.
 *070405.9-112209 - drop (still)
@@ Line 121: / Line 121: @@
 *070406.0-112315 - ogura 17/chauhan90 - fixed i3.
 *070406.4-112336 - ogura 18/chauhan91 - fixed i3
-*070406.5-112227 - somewhat uncertain. wait for optical. fixed i3.
+*070406.5-112227 - very uncertain. fixed i3. now actually IRx goes away.
 *070406.5-112128 - still drop. there for sure 2mass, i1i2, but then garbage i3i4.
@@ Line 134: / Line 141: @@
 *070409.9-112316 - wiram23/ogura25/chau100 - nice one
 *070411.2-111647 - greg78 - only 2 bands irac but looks like there might be a disk. chekc photom.

@@ Line 115: / Line 115: @@
 *070405.1-112313 - ogura15/chauhan 88 - nice, no changes. WISE is confused, again.
 *070405.5-112337 - original note says "check irac photom all bands - iffy. likely bad photometry." indeed horrifically faint i3i4. xls notes agree. Redone photometry has ridiculous errors. --> DROP THIS as not likely real.
@@ Line 126: / Line 134: @@
 *070406.5-112316 - ogura 19/chauhan92 - nice one. check i3i4
 *070407.9-112311 - ogura 21: - problem child - icky? check photometry - make sure that there is good photometry actually of this source.

@@ Line 106: / Line 106: @@
 *070402.9-112337 - ogura8+9/Chauhan84 - problem child - nice SED. leaving as is. xls notes: "is this really one star?" no, it's both ogura 8 and 9. see images and discussion [http://coolwiki.ipac.caltech.edu/index.php/Identification_of_Previously_Known_Objects_on_Candidate_List#Wednesday.2C_9.2F7.2C_from_Luisa here].
 *070403.0-112350 - ogura10/chauhan85 - nice SED. fixing i3. i2 now looks low, but it's actually right.
-*070403.1-112327 - chauhan 107 - problem child - extended emission in 2mass. optical also disjoint. OR reports MIPS-24 but that it's tough photometry. This one is the one that is next to 070402.7-112325 above, and it is also embedded in fuzzy stuff. there should be a legitimate m24 detection associated with this, for sure. fixing i3i4m1.
+*070403.1-112327 - chauhan 107 - problem child - extended emission in 2mass. optical also disjoint. OR reports MIPS-24 but that it's tough photometry. This one is the one that is next to 070402.7-112325 above, and it is also embedded in fuzzy stuff. there should be a legitimate m24 detection associated with this, for sure. fixing i3i4m1. wise is confused by big beam and extended emission.
@@ Line 119: / Line 127: @@
-*070403.9-112609 - shev102 - bright obj, slight IR excess if at all.
 *070405.6-112354 - drop?? check for why no 2mass, is in the catalog but with bad photqual flags.
 *070405.7-112123 - check i3 phot. icky otherwise.

@@ Line 104: / Line 104: @@
 *070402.3-112539 - Shevchenko99,Gregorio75 - problem child - this one is tagged as a problem child in my notes (though not the xls because it has the wrong crossids) - original notes say "little bit of excess, very bright". This also has the xls notes about mixed sources, so probably the notes meant that the previous source and this one are very close, and indeed they are -- it is the adjacent source in the 2MASS images. The original SED for this one is a lot cleaner than the previous one, which is a little odd -- if they are influencing each other's photometry, they both should be bad, unless one is a lot brighter than the other. J=10.4 here, and the prior one's J is 11.3. this one's [3.6]=9.06 and the other one's [3.6]=8.38, so not hugely different. Not sure what is going on here. Original photometry at i3i4 was missing; adding it in here. Indeed, photometry likely compromised by nearby star.  Will likely have to hand-process this using PSF subtraction in order to separate these two.
 *070402.7-112325 - original notes say "probably a galaxy. check images." In image, deep in nebulosity, and close to 070403.1-112327, though not nearly as close as the prior pair. Sources seem clean in i1i2i3, but fuzzy and offset(?!) in i4, suggesting that photometry is not going to be terribly reliable. It's unlikely to be a galaxy, in any case. Both sources are seen in M24, though this one appears to have gotten allocated all of the M24 flux in the catalog.  Fixing photom i3i4m1.
 STOPPPED HERE
@@ Line 111: / Line 116: @@
-*070402.9-112337 - ogura8+9/Chauhan84 - problem child - nice SED.
-*070403.0-112350 - ogura10/chauhan85 - check i3, nice SED
-*070403.1-112327 - chauhan 107 - problem child - one of our problem children with extended emission in 2mass.
 *070403.9-112609 - shev102 - bright obj, slight IR excess if at all.
 *070403.9-112326 - check i3, could be a nice one

@@ Line 77: / Line 77: @@
 =second pass, 10 Nov=
-*070349.6-112346 - with the new and improved i3, it no longer shows up as having an IR excess. --> DROP THIS
+*070349.6-112346 - with the new and improved i3, it no longer shows up as having an IR excess. this is not a previously known YSO candidate --> DROP THIS
 *070349.8-112822 - Shevchenko 88 - no IR excess. Keep because previously known.
 *070351.1-112054 - still drop.
@@ Line 103: / Line 103: @@
 *070402.2-112542 - original notes say "this is a galaxy - 8 um point is high, and it's a flat sed. check the images to be sure, but my guess is it's a QSO." BUT in looking at the images, it's too bright (far too bright) to be a QSO. Resurrect this one. XLS notes say "mixed sources 25 and 26" but I am not sure exactly what this means -- 25 and 26 by what numbering scheme?  The PSF does look somewhat complex, but the bright 'source' you see just south of it (below it in instrument coordinates) i4 is suspisciously like a latent (e.g., an afterimage on the array). The 2mass images do suggest that there is more than one source here. I did photometry on the short i4 frame, and the long i3 frame, and the SED changed a little. It still is a seriously goofy-looking SED, and based on the SED alone, I would be very reluctant to keep this one. See discussion next item.
 *070402.3-112539 - Shevchenko99,Gregorio75 - problem child - this one is tagged as a problem child in my notes (though not the xls because it has the wrong crossids) - original notes say "little bit of excess, very bright". This also has the xls notes about mixed sources, so probably the notes meant that the previous source and this one are very close, and indeed they are -- it is the adjacent source in the 2MASS images. The original SED for this one is a lot cleaner than the previous one, which is a little odd -- if they are influencing each other's photometry, they both should be bad, unless one is a lot brighter than the other. J=10.4 here, and the prior one's J is 11.3. this one's [3.6]=9.06 and the other one's [3.6]=8.38, so not hugely different. Not sure what is going on here. Original photometry at i3i4 was missing; adding it in here. Indeed, photometry likely compromised by nearby star.  Will likely have to hand-process this using PSF subtraction in order to separate these two.
 STOPPPED HERE
@@ Line 109: / Line 110: @@
-*070402.7-112325 - probably a galaxy. check images.
 *070402.9-112337 - ogura8+9/Chauhan84 - problem child - nice SED.
 *070403.0-112350 - ogura10/chauhan85 - check i3, nice SED