J/ApJ/794/120    THE SLOAN DIGITAL SKY SURVEY COADD: 275 deg2 OF DEEP SLOAN DIGITAL
SKY SURVEY IMAGING ON STRIPE 82    (Annis+, 2014)
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THE SLOAN DIGITAL SKY SURVEY COADD: 275 deg2 OF DEEP SLOAN DIGITAL
SKY SURVEY IMAGING ON STRIPE 82
       James Annis, Marcelle Soares-Santos, Michael A. Strauss, Andrew C. Becker, Scott Dodelson, Xiaohui Fan, James E. Gunn, Jiangang Hao, Zeljko Ivezic´, Sebastian Jester, Linhua Jiang, David E. Johnston, Jeffrey M. Kubo, Hubert Lampeitl, Huan Lin, Robert H. Lupton, Gajus Miknaitis, Hee-Jong Seo, Melanie Simet, and Brian Yanny
      <ApJ Vol 794, Number 2, 20 October 2014, Page 120>
      =2016MNRAS456...1359..1373
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ADC_Keywords: SDSS; Galaxies, photometry 
Keywords:  galaxies: fundamental parameters - galaxies: photometry -


Abstract:
    We present details of the construction and characterization of the coaddition of the Sloan Digital Sky Survey (SDSS) Stripe 82 ugriz imaging data. This survey consists of 275 deg 2 of repeated scanning by the SDSS camera over –50° ≤ α ≤ 60° and –1.°25 ≤ δ ≤ +1.°25 centered on the Celestial Equator. Each piece of sky has ~20 runs contributing and thus reaches ~2 mag fainter than the SDSS single pass data, i.e., to r ~ 23.5 for galaxies. We discuss the image processing of the coaddition, the modeling of the point-spread function (PSF), the calibration, and the production of standard SDSS catalogs. The data have an r -band median seeing of 1.''1 and are calibrated to ≤1%. Star color-color, number counts, and PSF size versus modeled size plots show that the modeling of the PSF is good enough for precision five-band photometry. Structure in the PSF model versus magnitude plot indicates minor PSF modeling errors, leading to misclassification of stars as galaxies, as verified using VVDS spectroscopy. There are a variety of uses for this wide-angle deep imaging data, including galactic structure, photometric redshift computation, cluster finding and cross wavelength measurements, weak lensing cluster mass calibrations, and cosmic shear measurements..

Description:
    A coadd reuction of SDSS data on Stripe 82. Photometric parameters for a large fraction of the SDSS Stripe 82 deep coadd.

File Summary:
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 FileName           Lrecl    Records    Explanations
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ReadMe                                  This file
SDSS-S82_November2017.fits                 Photometric parameters for SDSS Stripe 82
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Description of file: SDSS-S82_November2017.fits
Column headings:
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'objID'
'ra'
'dec'
'skyVersion'
'run'
'rerun'
'camcol'
'field'
'obj'
'mode'
'nChild'
'type'
'probPSF'
'insideMask'
'flags'
'flags_u'
'flags_g'
'flags_r'
'flags_i'
'flags_z'
'psfMag_u'
'psfMag_g'
'psfMag_r'
'psfMag_i'
'psfMag_z'
'psfMagErr_u'
'psfMagErr_g'
'psfMagErr_r'
'psfMagErr_i'
'psfMagErr_z'
'fiberMag_u'
'fiberMag_g'
'fiberMag_r'
'fiberMag_i'
'fiberMag_z'
'fiberMagErr_u'
'fiberMagErr_g'
'fiberMagErr_r'
'fiberMagErr_i'
'fiberMagErr_z'
'petroMag_u'
'petroMag_g'
'petroMag_r'
'petroMag_i'
'petroMag_z'
'petroMagErr_u'
'petroMagErr_g'
'petroMagErr_r'
'petroMagErr_i'
'petroMagErr_z'
'modelMag_u'
'modelMag_g'
'modelMag_r'
'modelMag_i'
'modelMag_z'
'modelMagErr_u'
'modelMagErr_g'
'modelMagErr_r'
'modelMagErr_i'
'modelMagErr_z'
'help_field'


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(End)                                Raphael Shirley [Sussex, UK]    10-Jan-2019