J/ApJ/757/83ivo://CDS.VizieR/J/ApJ/757/83doi:10.26093/cds/vizier.17570083CDSDesai S.Armstrong R.Mohr J.J.Semler D.R.Liu J.Bertin E.,Allam S.S.Barkhouse W.A.Bazin G.Buckley-Geer E.J.Cooper M.C.,Hansen S.M.High F.W.Lin H.Lin Y.-T.Ngeow C.-C.Rest A.Song J.,Tucker D.Zenteno A.2017-06-01T08:53:10Z2014-07-28T14:46:09ZCDS support team

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

cds-question@unistra.frinfrared-photometryvisible-astronomybroad-band-photometryredshiftedsurveysThe Blanco Cosmology Survey (BCS) is a 60 night imaging survey of ~80deg^2^ of the southern sky located in two fields: (5hr,-55{deg}) and (23hr,-55{deg}). The survey was carried out between 2005 and 2008 in griz bands with the Mosaic2 imager on the Blanco 4m telescope. The primary aim of the BCS survey is to provide the data required to optically confirm and measure photometric redshifts for Sunyaev-Zel'dovich effect selected galaxy clusters from the South Pole Telescope and the Atacama Cosmology Telescope. We process and calibrate the BCS data, carrying out point-spread function-corrected model-fitting photometry for all detected objects. The median 10{sigma} galaxy (point-source) depths over the survey in griz are approximately 23.3 (23.9), 23.4 (24.0), 23.0 (23.6), and 21.3 (22.1), respectively. The astrometric accuracy relative to the USNO-B survey is ~45mas. We calibrate our absolute photometry using the stellar locus in grizJ bands, and thus our absolute photometric scale derives from the Two Micron All Sky Survey, which has ~2% accuracy. The scatter of stars about the stellar locus indicates a systematic floor in the relative stellar photometric scatter in griz that is ~1.9%, ~2.2%, ~2.7%, and ~2.7%, respectively. A simple cut in the AstrOmatic star-galaxy classifier spread_ model produces a star sample with good spatial uniformity. We use the resulting photometric catalogs to calibrate photometric redshifts for the survey and demonstrate scatter {delta}z/(1+z)=0.054 with an outlier fraction {eta}<5% to z~1. We highlight some selected science results to date and provide a full description of the released data products.2012ApJ...757...83Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/757/83CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/268 : DEEP2 Redshift Survey, Data Release 4 (Matthews+ 2013)III/250 : The VIMOS VLT deep survey (VVDS-DEEP) (Le Fevre+ 2005)VII/110 : Rich Clusters of Galaxies (Abell+ 1989)VII/4 : Abell and Zwicky Clusters of Galaxies (Abell+ 1974)J/ApJ/742/48 : Blanco survey of the lens BCS J2352-5452 (Buckley-Geer+, 2011)J/ApJS/191/340 : Southern Cosmology Survey. II. (Menanteau+, 2010)J/A+A/509/A81 : Candidate clusters detected in 6 CFHTLS fields (Adami+, 2010)J/AJ/137/2981 : Northern Optical Cluster Survey. III. (Gal+, 2009)J/MNRAS/375/68 : MegaZ-LRG catalogue (Collister+, 2007)J/AJ/134/2398 : Stellar SEDs in SDSS and 2MASS filters (Covey+, 2007)J/ApJ/660/239 : MaxBCG cat. of 13823 SDSS galaxy clusters (Koester+, 2007)J/A+A/428/1043 : Redshifts from VIMOS VLT Deep Survey (Le Fevre+, 2004)J/ApJS/137/117 : Las Campanas Distant Cluster Survey (LCDCS) (Gonzales+, 2001)J/ApJS/129/475 : The CNOC2 survey. I. (Yee+, 2000)http://www.usm.uni-muenchen.de/BCS : BCS home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/757/83https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/757/83http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/757/83https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/757/83https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/757/83http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/757/83GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/757/83/bcs05hr (*BCS 5hr catalog (combined catalog of 5hr field after EXCLUDING bad tiles))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/757/83/bcs05hr?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/757/83/bcs05hr?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/757/83/bcs05hr?GETtext/xml+votable180.050000true86.60041-54.976190.005555555555555556Cone search capability for table J/ApJ/757/83/bcs23hr (*BCS 23hr catalog (combined catalog of 23hr field after EXCLUDING bad tiles))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/757/83/bcs23hr?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/757/83/bcs23hr?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/757/83/bcs23hr?GETtext/xml+votable180.050000true350.28622-55.778640.0055555555555555564/2117 2118 2119 2885 5/8467 8514 11533 11537 11538 11539 11544 11545 11548 6/33847 33852 33853 33855 33863 33867 34048 34050 34051 34054 34055 34060 34061 34062 34066 34080 34081 34082 34088 34089 34090 46111 46147 46185 46188 46189 46196 46197 46198 46200 46201 46204 46338 46339 46344 46345 46346https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/757/83?format=asciiOpticalInfrareddefaultJ/ApJ/757/83/bcs05hr*BCS 5hr catalog (combined catalog of 5hr field after EXCLUDING bad tiles)TileName of tile (HHMM+DDMM) (tilename) (1)obs.fieldcharID[692766381/704461337] Identifier number from DESDM database (objectid) (2)meta.id;meta.mainlongprimaryRAJ2000Right ascension (J2000) (RA)degpos.eq.ra;meta.mainindexedDEJ2000Declination (J2000) (DEC)degpos.eq.dec;meta.mainindexedgmag[4.9/47]?=99 Model g-band AB magnitude (mag_model_g)magphot.mag;em.opt.Bfloatnullablee_gmag[0/99]?=99 gmag uncertainty (magerr_model_g)magstat.error;phot.mag;em.opt.Bfloatnullablegauto[6.9/40]?=99 Kron g-band AB magnitude (mag_auto_g)magphot.mag;em.opt.Bfloatnullablee_gauto[0/99]?=99 gauto uncertainty (magerr_auto_g)magstat.errorfloatnullablegpsf[10.7/32]?=99 PSF g-band AB magnitude (mag_psf_g)magphot.mag;em.opt.Bfloatnullablee_gpsf[0/99]?=99 gpsf uncertainty (magerr_psf_g)magstat.errorfloatnullablegpetro[6.8/42]?=99 Petrosian g-band AB magnitude (mag_petro_g)magphot.mag;em.opt.Bfloatnullablee_gpetro[0/99]?=99 gpetro uncertainty (magerr_petro_g)magstat.errorfloatnullablegap3[11.1/41]?=99 g-band AB magnitude in 3arcsec aperture (mag_aper3_g)magphot.mag;em.opt.Bfloatnullablee_gap3[0/99]?=99 gap3 uncertainty (magerr_aper3_g)magstat.errorfloatnullablegfl[0/92] SExtractor flag (flags_g)meta.codeintgS/G[0/1] SExtractor star/galaxy separator (0=galaxy, 1=star) (class_star_g)meta.idfloatgDiff[-99/99] Difference in PSF and Sersic magnitude (g) (spread_model_g)magphot.mag;arith.difffloatnullablee_gDiff[0/99]?=99 gDiff uncertainty (spread_modelerr_g)magstat.errorfloatnullablermag[5.7/45]?=99 Model r-band AB magnitude (mag_model_r)magphot.mag;em.opt.Rfloatnullablee_rmag[0/99]?=99 rmag uncertainty (magerr_model_r)magstat.error;phot.mag;em.opt.Rfloatnullablerauto[7.6/42]?=99 Kron r-band AB magnitude (mag_auto_r)magphot.mag;em.opt.Rfloatnullablee_rauto[0/99]?=99 rauto uncertainty (magerr_auto_r)magstat.errorfloatnullablerpsf[12.4/32]?=99 PSF r-band AB magnitude (mag_psf_r)magphot.mag;em.opt.Rfloatnullablee_rpsf[0/99]?=99 rpsf uncertainty (magerr_psf_r)magstat.errorfloatnullablerpetro[7.5/40]?=99 Petrosian r-band AB magnitude (mag_petro_r)magphot.mag;em.opt.Rfloatnullablee_rpetro[0/99]?=99 rpetro uncertainty (magerr_petro_r)magstat.errorfloatnullablerap3[12.9/38]?=99 r-band AB magnitude in 3arcsec aperture (mag_aper3_r)magphot.mag;em.opt.Rfloatnullablee_rap3[0/99]?=99 rap3 uncertainty (magerr_aper3_r)magstat.errorfloatnullablerfl[0/92] SExtractor flag (flags_r)meta.codeintrS/G[0/1] SExtractor star/galaxy separator (0=galaxy, 1=star) (class_star_r)meta.idfloatrDiff[-99/99] Difference in PSF and Sersic magnitude (r) (spread_model_r)magphot.mag;arith.difffloatnullablee_rDiff[0/99]?=99 rDiff uncertainty (spread_modelerr_r)magstat.errorfloatnullableimag[3.1/42] Model i-band AB magnitude (mag_model_i)magphot.mag;em.opt.Ifloatnullablee_imag[0/99]?=99 imag uncertainty (magerr_model_i)magstat.error;phot.mag;em.opt.Ifloatnullableiauto[3.7/40]?=99 Kron i-band AB magnitude (mag_auto_i)magphot.mag;em.opt.Ifloatnullablee_iauto[0/99]?=99 iauto uncertainty (magerr_auto_i)magstat.errorfloatnullableipsf[-24.6/29]?=99 PSF i-band AB magnitude (mag_psf_i)magphot.mag;em.opt.Ifloatnullablee_ipsf[0/99]?=99 ipsf uncertainty (magerr_psf_i)magstat.errorfloatnullableipetro[3.7/40]?=99 Petrosian i-band AB magnitude (mag_petro_i)magphot.mag;em.opt.Ifloatnullablee_ipetro[0/99]?=99 ipetro uncertainty (magerr_petro_i)magstat.errorfloatnullableiap3[7.3/36]?=99 i-band AB magnitude in 3arcsec aperture (mag_aper3_i)magphot.mag;em.opt.Ifloatnullablee_iap3[0/99]?=99 iap3 uncertainty (magerr_aper3_i)magstat.errorfloatnullableifl[0/92] SExtractor flag (flags_i)meta.codeintiS/G[0/1] SExtractor star/galaxy separator (0=galaxy, 1=star) (class_star_i)meta.idfloatiDiff[-99/99] Difference in PSF and Sersic magnitude (i) (spread_model_i)magphot.mag;arith.difffloatnullablee_iDiff[0/99]?=99 iDiff uncertainty (spread_modelerr_i)magstat.errorfloatnullablezmag[4/44] Model z-band AB magnitude (mag_model_z)magphot.mag;em.opt.Ifloatnullablee_zmag[0/99]?=99 zmag uncertainty (magerr_model_z)magstat.error;phot.mag;em.opt.Ifloatnullablezauto[6.4/40]?=99 Kron z-band AB magnitude (mag_auto_z)magphot.mag;em.opt.Ifloatnullablee_zauto[0/99]?=99 zauto uncertainty (magerr_auto_z)magstat.errorfloatnullablezpsf[10.6/27]?=99 PSF z-band AB magnitude (mag_psf_z)magphot.mag;em.opt.Ifloatnullablee_zpsf[0/99]?=99 zpsf uncertainty (magerr_psf_z)magstat.errorfloatnullablezpetro[6.4/39]?=99 Petrosian i-band AB magnitude (mag_petro_z)magphot.mag;em.opt.Ifloatnullablee_zpetro[0/99]?=99 zpetro uncertainty (magerr_petro_z)magstat.errorfloatnullablezap3[11.3/37]?=99 z-band AB magnitude in 3arcsec aperture (mag_aper3_z)magphot.mag;em.opt.Ifloatnullablee_zap3[0/99]?=99 zap3 uncertainty (magerr_aper3_z)magstat.errorfloatnullablezfl[0/92] SExtractor flag (flags_z)meta.codeintzS/G[0/1] SExtractor star/galaxy separator (0=galaxy, 1=star) (class_star_z)meta.idfloatzDiff[-99/99] Difference in PSF and Sersic magnitude (z) (spread_model_z)magphot.mag;arith.difffloatnullablee_zDiff[0/99]?=99 zDiff uncertainty (spread_modelerr_z)magstat.errorfloatnullablez[-0.06/3.1] Photometric redshift (z_phot)src.redshiftfloate_z[0.01/99]?=99 z uncertainty (z_phot_err)stat.error;src.redshiftfloatnullablen_z[0/1] Within ANNZ training set parameter space (z_phot_flag) (3)meta.notefloatJ/ApJ/757/83/bcs23hr*BCS 23hr catalog (combined catalog of 23hr field after EXCLUDING bad tiles)TileName of tile (HHMM+DDMM) (tilename) (1)obs.fieldcharID[692766381/704461337] Identifier number from DESDM database (objectid) (2)meta.id;meta.mainlongprimaryRAJ2000Right ascension (J2000) (RA)degpos.eq.ra;meta.mainindexedDEJ2000Declination (J2000) (DEC)degpos.eq.dec;meta.mainindexedgmag[4.9/47]?=99 Model g-band AB magnitude (mag_model_g)magphot.mag;em.opt.Bfloatnullablee_gmag[0/99]?=99 gmag uncertainty (magerr_model_g)magstat.error;phot.mag;em.opt.Bfloatnullablegauto[6.9/40]?=99 Kron g-band AB magnitude (mag_auto_g)magphot.mag;em.opt.Bfloatnullablee_gauto[0/99]?=99 gauto uncertainty (magerr_auto_g)magstat.errorfloatnullablegpsf[10.7/32]?=99 PSF g-band AB magnitude (mag_psf_g)magphot.mag;em.opt.Bfloatnullablee_gpsf[0/99]?=99 gpsf uncertainty (magerr_psf_g)magstat.errorfloatnullablegpetro[6.8/42]?=99 Petrosian g-band AB magnitude (mag_petro_g)magphot.mag;em.opt.Bfloatnullablee_gpetro[0/99]?=99 gpetro uncertainty (magerr_petro_g)magstat.errorfloatnullablegap3[11.1/41]?=99 g-band AB magnitude in 3arcsec aperture (mag_aper3_g)magphot.mag;em.opt.Bfloatnullablee_gap3[0/99]?=99 gap3 uncertainty (magerr_aper3_g)magstat.errorfloatnullablegfl[0/92] SExtractor flag (flags_g)meta.codeintgS/G[0/1] SExtractor star/galaxy separator (0=galaxy, 1=star) (class_star_g)meta.idfloatgDiff[-99/99] Difference in PSF and Sersic magnitude (g) (spread_model_g)magphot.mag;arith.difffloatnullablee_gDiff[0/99]?=99 gDiff uncertainty (spread_modelerr_g)magstat.errorfloatnullablermag[5.7/45]?=99 Model r-band AB magnitude (mag_model_r)magphot.mag;em.opt.Rfloatnullablee_rmag[0/99]?=99 rmag uncertainty (magerr_model_r)magstat.error;phot.mag;em.opt.Rfloatnullablerauto[7.6/42]?=99 Kron r-band AB magnitude (mag_auto_r)magphot.mag;em.opt.Rfloatnullablee_rauto[0/99]?=99 rauto uncertainty (magerr_auto_r)magstat.errorfloatnullablerpsf[12.4/32]?=99 PSF r-band AB magnitude (mag_psf_r)magphot.mag;em.opt.Rfloatnullablee_rpsf[0/99]?=99 rpsf uncertainty (magerr_psf_r)magstat.errorfloatnullablerpetro[7.5/40]?=99 Petrosian r-band AB magnitude (mag_petro_r)magphot.mag;em.opt.Rfloatnullablee_rpetro[0/99]?=99 rpetro uncertainty (magerr_petro_r)magstat.errorfloatnullablerap3[12.9/38]?=99 r-band AB magnitude in 3arcsec aperture (mag_aper3_r)magphot.mag;em.opt.Rfloatnullablee_rap3[0/99]?=99 rap3 uncertainty (magerr_aper3_r)magstat.errorfloatnullablerfl[0/92] SExtractor flag (flags_r)meta.codeintrS/G[0/1] SExtractor star/galaxy separator (0=galaxy, 1=star) (class_star_r)meta.idfloatrDiff[-99/99] Difference in PSF and Sersic magnitude (r) (spread_model_r)magphot.mag;arith.difffloatnullablee_rDiff[0/99]?=99 rDiff uncertainty (spread_modelerr_r)magstat.errorfloatnullableimag[3.1/42] Model i-band AB magnitude (mag_model_i)magphot.mag;em.opt.Ifloatnullablee_imag[0/99]?=99 imag uncertainty (magerr_model_i)magstat.error;phot.mag;em.opt.Ifloatnullableiauto[3.7/40]?=99 Kron i-band AB magnitude (mag_auto_i)magphot.mag;em.opt.Ifloatnullablee_iauto[0/99]?=99 iauto uncertainty (magerr_auto_i)magstat.errorfloatnullableipsf[-24.6/29]?=99 PSF i-band AB magnitude (mag_psf_i)magphot.mag;em.opt.Ifloatnullablee_ipsf[0/99]?=99 ipsf uncertainty (magerr_psf_i)magstat.errorfloatnullableipetro[3.7/40]?=99 Petrosian i-band AB magnitude (mag_petro_i)magphot.mag;em.opt.Ifloatnullablee_ipetro[0/99]?=99 ipetro uncertainty (magerr_petro_i)magstat.errorfloatnullableiap3[7.3/36]?=99 i-band AB magnitude in 3arcsec aperture (mag_aper3_i)magphot.mag;em.opt.Ifloatnullablee_iap3[0/99]?=99 iap3 uncertainty (magerr_aper3_i)magstat.errorfloatnullableifl[0/92] SExtractor flag (flags_i)meta.codeintiS/G[0/1] SExtractor star/galaxy separator (0=galaxy, 1=star) (class_star_i)meta.idfloatiDiff[-99/99] Difference in PSF and Sersic magnitude (i) (spread_model_i)magphot.mag;arith.difffloatnullablee_iDiff[0/99]?=99 iDiff uncertainty (spread_modelerr_i)magstat.errorfloatnullablezmag[4/44] Model z-band AB magnitude (mag_model_z)magphot.mag;em.opt.Ifloatnullablee_zmag[0/99]?=99 zmag uncertainty (magerr_model_z)magstat.error;phot.mag;em.opt.Ifloatnullablezauto[6.4/40]?=99 Kron z-band AB magnitude (mag_auto_z)magphot.mag;em.opt.Ifloatnullablee_zauto[0/99]?=99 zauto uncertainty (magerr_auto_z)magstat.errorfloatnullablezpsf[10.6/27]?=99 PSF z-band AB magnitude (mag_psf_z)magphot.mag;em.opt.Ifloatnullablee_zpsf[0/99]?=99 zpsf uncertainty (magerr_psf_z)magstat.errorfloatnullablezpetro[6.4/39]?=99 Petrosian i-band AB magnitude (mag_petro_z)magphot.mag;em.opt.Ifloatnullablee_zpetro[0/99]?=99 zpetro uncertainty (magerr_petro_z)magstat.errorfloatnullablezap3[11.3/37]?=99 z-band AB magnitude in 3arcsec aperture (mag_aper3_z)magphot.mag;em.opt.Ifloatnullablee_zap3[0/99]?=99 zap3 uncertainty (magerr_aper3_z)magstat.errorfloatnullablezfl[0/92] SExtractor flag (flags_z)meta.codeintzS/G[0/1] SExtractor star/galaxy separator (0=galaxy, 1=star) (class_star_z)meta.idfloatzDiff[-99/99] Difference in PSF and Sersic magnitude (z) (spread_model_z)magphot.mag;arith.difffloatnullablee_zDiff[0/99]?=99 zDiff uncertainty (spread_modelerr_z)magstat.errorfloatnullablez[-0.06/3.1] Photometric redshift (z_phot)src.redshiftfloate_z[0.01/99]?=99 z uncertainty (z_phot_err)stat.error;src.redshiftfloatnullablen_z[0/1] Within ANNZ training set parameter space (z_phot_flag) (3)meta.notefloat