Difference between revisions of "SHIPsPhot"

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(Created page with "Purpose of this page: * Provide photometry references for Herschel specific photometry ==Aperture Photometry Parameters== {| class="wikitable" |+Reading List |- ! scope="co...")
 
 
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{| class="wikitable"
 
{| class="wikitable"
−
|+Reading List
+
|+Recommended Values for NGC 281
 
|-
 
|-
−
! scope="col"| Paper
+
! scope="col"| Filter
−
! scope="col"| Title
+
! scope="col"| Aperture Radius (")
−
! scope="col"| Description
+
! scope="col"| Inner Sky Radius (")
 +
! scope="col"| Outer Sky Radius (")
 +
! scope="coI"| Aperture Correction
 +
! scope="col"| Pixels
 +
|-
 +
|70 microns
 +
|9.6
 +
|9.6
 +
|19.2
 +
|0.7331
 +
|8
 +
|-
 +
|100 microns
 +
|9.6
 +
|9.6
 +
|19.2
 +
|0.6944
 +
|8
 +
|-
 +
|160 microns
 +
|12.8
 +
|12.8
 +
|25.6
 +
|0.6602
 +
|5.3 or 6 (if 5.3 is rejected by APT)
 +
|}
 +
 
 +
==Herschel/PACS optical properties==
 +
 
 +
* [https://nhscsci.ipac.caltech.edu/pacs/docs/PACS_AOT_flyer.pdf PACS quick summary guide] (BEWARE: arc-seconds vs pixels).  SHIPs data is taken at 20"/sec scan speed.  Take an average between the long and the short side of the PSF.
 +
 
 +
==APT parameters==
 +
 
 +
{| class="wikitable"
 +
|+Values to use for APT photometry
 +
|-
 +
! scope="col"| Parameter/Setting
 +
! scope="col"| SHIPs value
 
! scope="col"| Comments
 
! scope="col"| Comments
−
! scope="coI"| Assignment
 
 
|-
 
|-
−
|NITARP pages
+
|Aperture Values
−
|Our internal NITARP pages from Luisa, me and others.  These are okay because they are one of your source of knowledge on the subject.
+
|As in above table recomputed to pixels.
 
|
 
|
 +
|-
 +
|Select source algorithm
 +
|Model 0
 
|
 
|
 +
|-
 +
|Select sky algorithm
 +
|Model B
 
|
 
|
 
|-
 
|-
−
|[http://adsabs.harvard.edu/abs/2007ARA%26A..45..565M McKee & Osteriker (2007)]
+
|Use centroid in photometry calculation?
−
|Theory of Star Formation
+
|Yes.  Box is checked.
−
|Review article
 
−
|Available for free via the arXiv link.
 
 
|
 
|
 
|-
 
|-
−
|[http://arxiv.org/pdf/astro-ph/0306595v2.pdf Larson (2003)]
+
|Automatically snap aperture to centroid?
−
|The physics of star formation.
+
|Yes. Box is checked.
−
|Another review with useful points to refer to.
 
−
|
 
 
|
 
|
 
|}
 
|}
  
−
||border=1 width=80%
+
[[File:APT-parameterss.png|300px|Screen capture of APT parameter settings.]]
−
||!            ||!Aperture Radius (") ||!Inner Sky Radius (") ||!Outer Sky Radius (") ||!Aperture Correction ||
+
 
−
||!70 microns  ||9.6                  ||9.6                  ||19.2                  ||0.7331              ||
+
 
−
||!100 microns ||9.6                  ||9.6                  ||19.2                  ||0.6944              ||
+
 
−
||!160 microns ||12.8                ||12.8                  ||25.6                  ||0.6602              ||
+
==Reporting Photometry==
 +
The type of information to be included in the photometry file as captured during the June 2013 visit.
 +
 
 +
[[File:SHIPsDataTableRules.txt]]
 +
 
 +
 
 +
 
 +
==Photometry Assignment==
  
 +
[[5 APT Practice Sources]]
  
−
==Photometry Tools==
+
==The Big Picture==
−
NITARP's own vintage.
+
* Gather relevant and previously available photometry on NGC 281 (DONE, except Spitzer)
−
===APT: Aperture Photometry Tool===
+
* Gather images from previous surveys (DONE)
 +
* Herschel Images (DONE, but may be reprocessed)
 +
* Aperture Photometry
 +
* PSF photometry (Preliminary version, calibration missing).
 +
* Check Aperture photometry for bad sources, missed sources.
 +
* Create flags for all sources.
 +
* Check Aperture vs. PSF photometry.  Select one or the other for each protostar.
 +
* Finalize Herschel photometry
 +
* Merge all photometry.

Latest revision as of 22:36, 28 August 2013

Purpose of this page:

  • Provide photometry references for Herschel specific photometry


Aperture Photometry Parameters

Recommended Values for NGC 281
Filter Aperture Radius (") Inner Sky Radius (") Outer Sky Radius (") Aperture Correction Pixels
70 microns 9.6 9.6 19.2 0.7331 8
100 microns 9.6 9.6 19.2 0.6944 8
160 microns 12.8 12.8 25.6 0.6602 5.3 or 6 (if 5.3 is rejected by APT)

Herschel/PACS optical properties

  • PACS quick summary guide (BEWARE: arc-seconds vs pixels). SHIPs data is taken at 20"/sec scan speed. Take an average between the long and the short side of the PSF.

APT parameters

Values to use for APT photometry
Parameter/Setting SHIPs value Comments
Aperture Values As in above table recomputed to pixels.
Select source algorithm Model 0
Select sky algorithm Model B
Use centroid in photometry calculation? Yes. Box is checked.
Automatically snap aperture to centroid? Yes. Box is checked.

Screen capture of APT parameter settings.


Reporting Photometry

The type of information to be included in the photometry file as captured during the June 2013 visit.

File:SHIPsDataTableRules.txt


Photometry Assignment

5 APT Practice Sources

The Big Picture

  • Gather relevant and previously available photometry on NGC 281 (DONE, except Spitzer)
  • Gather images from previous surveys (DONE)
  • Herschel Images (DONE, but may be reprocessed)
  • Aperture Photometry
  • PSF photometry (Preliminary version, calibration missing).
  • Check Aperture photometry for bad sources, missed sources.
  • Create flags for all sources.
  • Check Aperture vs. PSF photometry. Select one or the other for each protostar.
  • Finalize Herschel photometry
  • Merge all photometry.
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