J/ApJS/172/615ivo://CDS.VizieR/J/ApJS/172/615doi:10.26093/cds/vizier.21720615CDSHaussler B.McIntosh D.H.Barden M.Bell E.F.Rix H.-W.Borch A.,Beckwith S.V.W.Caldwell J.A.R.Heymans C.Jahnke K.Jogee S.,Koposov S.E.Meisenheimer K.Sanchez S.F.Somerville R.S.Wisotzki L.,Wolf C.2009-06-27T17:51:58Z2009-06-27T17:46:04ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frastronomical-modelsgalaxy-classification-systemsgalaxiescatalogsIn the context of measuring the structures of intermediate-redshift galaxies with HST ACS surveys, we tune, test, and compare two widely used fitting codes (GALFIT and GIM2D) for fitting single-component Sersic models to both simulated and real galaxy data. Our study focuses on the GEMS survey (Rix et al., 2004ApJS..152..163R) with the sensitivity of typical HST survey data, and we include our final catalog of fit results for all 41495 objects detected in GEMS. Using simulations, we find that fitting accuracy depends sensitively on galaxy profile shape.2007ApJS..172..615Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/172/615CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/468/937 : K-band AO imaging in COSMOS deep field (Huertas-Company+, 2007)J/AJ/122/621 : Galaxy morphology in the CFRS (van den Bergh, 2001)J/ApJ/542/673 : Morphological types of galaxies in clusters (Fasano+, 2000)http://archive.stsci.edu/prepds/gems/ : GEMS Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/172/615https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/172/615http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/172/615https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/172/615https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/172/615http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/172/615GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/172/615/table9 (GALFIT fitting results for all GEMS galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/172/615/table9?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/172/615/table9?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/172/615/table9?GETtext/xml+votable180.050000true53.316325-28.059058060.0055555555555555566/35934 35935 35957https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/172/615?format=asciiOpticaldefaultJ/ApJS/172/615/table9GALFIT fitting results for all GEMS galaxiesnThe GALFIT derived Sersic indexstat.fit.paramfloatYpixThe Y pixel coordinatepixpos.cartesian.yfloatSkyBackground sky value from GALAPAGOSctinstr.backgroundfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGtileThe GEMS tile identificationobs.imagecharSeqObject number in SExtractor catalog of Gtilemeta.idintGEMSThe GEMS identification (JHHMMSS.SS+DDMMSS.S)meta.id;meta.maincharXpixThe X pixel coordinatepixpos.cartesian.xfloatF850The GALFIT derived F850LP band magnitudemagphot.mag;em.opt.Ifloate_F850F850LP band magnitude uncertainty (1)magstat.errorfloatReThe GALFIT derived half-light radiuspixphys.angSizefloate_ReHalf-light radius uncertainty (1)pixstat.errorfloate_nSersic index uncertainty (1)stat.errorfloatb/aThe GALFIT derived axis ratiophys.angSize;arith.ratiofloate_b/aAxis ratio uncertainty (1)stat.errorfloatPAimgPosition Angle with respect to the image (2)degpos.posAngfloatPAPosition Angle (North through East)degpos.posAngfloate_PAPosition angle uncertainty (1)degstat.errorfloatf1[0/1] Flag for constraint fitting (4)meta.codeintf2[0/1] Flag for science sample (5)meta.codeintRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainindexedDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainindexed