测光红移星表数据描述

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1、COSMOSPhotometricRedshiftCatalog(maglimit25)DefinitionsTheCOSMOSArchiveservesdatatakenfortheCosmicEvolutionSurvey(COSMOS)project.COSMOSisanastronomicalsurveydesignedtoprobetheformationandevolutionofgalaxiesasafunctionofcosmictime(redshift)andlargescalestructuralenvironment.Thesur

2、veycoversa2squaredegreeequatorialfieldwithimagingbymostofthemajorspace-basedtelescopes(Hubble,Spitzer,GALEX,XMM,Chandra)andanumberoflargegroundbasedtelescopes(Subaru,VLA,ESO-VLT,UKIRT,NOAO,CFHT,andothers).IRSAservestheCOSMOSarchiveusingthefollowingsearchmethods:·Spatialsearchonal

3、limagesandsmallcatalogs,usingAtlas·Advancedsearchononlythelargercatalogs,usingGatorCOSMOSPhotometricRedshiftCatalog,version1.5,maglimig25,ColumnDefinitionsGatorservestheCOSMOSOctober2008PhotometricRedshiftCatalog(55columns[50delivered+5IRSA-created],385,065datarows).Thecolumndesc

4、riptionscanbefoundbelow.PleasealsoseethephotzcatalogREADMEfileformoreinformationaboutthecatalogitself.nameintypeunitsdescriptionIdintnumberCatalogIDnumberpertiletileintnumberImagetilewhichcontainsthisobjectradoubledegRightAscension(J2000)decdoubledegDeclination(J2000)zp_bestdoubl

5、eredshiftzp_best=zgalifgalaxy(column7)zp_best=0ifstarzp_best=9.99ifXray(Usethephoto-zvaluesfromSalvatoetal.2008,releasedseparately)zp_best=99.0ifIA>25.5(faintsourceswithalowerphoto-zaccuracy,needstobehandlewithextremecare)zp_best=-99ifinamaskedareatypeintnumbertype=0ifgalaxytype=

6、1ifstartype=2ifXraysourcetype=3ifIA>25.5(faintsourceswithalowerphoto-zaccuracy,needstobehandlewithextremecare)type=-99ifmaskedareazp_galdoubleredshiftphoto-zusingthegalaxytemplates(everysourcehasaredshift)zl68_galdoubleredshiftlowerlimit,68%confidencelevelzu68_galdoubleredshiftup

7、perlimit,68%confidencelevelzl99_galdoubleredshiftlowerlimit,99%confidencelevelzu99_galdoubleredshiftupperlimit,99%confidencelevelchi_galdoublenumberreducedchi2(-99iflessthan3filters)mod_galintnumberbestfittemplate(1->8Ell-S0,9->15Sa-Sc,16->19Sd-SdmfromPollettaetal.,>=20fromBC03).

8、ebvdoublenumberadditionalextinctionE(B-V