J/ApJS/172/583ivo://CDS.VizieR/J/ApJS/172/583doi:10.26093/cds/vizier.21720583CDSHwang N.Lee M.G.Lee H.M.Im M.Kim T.Matsuhara H.Wada T.,Oyabu S.Pak S.Chun M.-Y.Watarai H.Nakagawa T.Pearson C.,Takagi T.Hanami H.White G.J.2009-06-21T12:34:58Z2009-06-21T12:25:25ZCDS support team

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

cds-question@unistra.frinfrared-photometryvisible-astronomybroad-band-photometrygalaxiesgalaxy-clustersWe present a five-band (u* g' r' i' z') optical photometry catalog of the sources in the North Ecliptic Pole (NEP) region based on deep observations made with MegaCam at CFHT. The source catalog covers about 2 square degree area centered at the NEP and reaches depths of about 26mag for u*, g', r' bands, about 25mag for i' band, and about 24mag for z' band (4{sigma} detection over a 1" aperture). The total number of cataloged sources brighter than r'=23mag is about 56000 including both point sources and extended sources. From the investigation of photometric properties using the color- magnitude diagrams and color-color diagrams, we have found that the colors of extended sources are mostly (u*-r')<3.0 and (g'-z')>0.5. This can be used to separate the extended sources from the point sources reliably, even for the faint source domain where typical morphological classification schemes hardly work efficiently. We have derived an empirical color-redshift relation of the red sequence galaxies using the Sloan Digital Sky Survey data. By applying this relation to our photometry catalog and searching for any spatial overdensities, we have found two galaxy clusters and one nearby galaxy group.2007ApJS..172..583Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/172/583CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/123/377 : u*g*r*i*z* Photometry of stars, galaxies, QSOs (Newberg+ 1999)J/ApJS/162/304 : ROSAT NEP X-ray source catalog (Henry+, 2006)J/PASJ/59/S529 : NEP deep survey at 11um (Lee+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/172/583https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/172/583http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/172/583https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/172/583https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/172/583http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/172/583GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/172/583/table2 (NEP Optical Source Catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/172/583/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/172/583/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/172/583/table2?GETtext/xml+votable180.050000true271.143829266.0613250.0055555555555555566/10239 11605 11607 15359 16042 16043https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/172/583?format=asciiOpticalInfrareddefaultJ/ApJS/172/583/table2NEP Optical Source Cataloge_zmag? The error on zmag (2)magstat.error;phot.mag;em.opt.IfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[HLL2007]Source ID numbermeta.id;meta.mainintRAJ2000Right Ascension in decimal degrees (J2000) (1)degpos.eq.ra;meta.mainindexedDEJ2000Declination in decimal degrees (J2000) (1)degpos.eq.dec;meta.mainindexedumag? The u* band AB magnitude (2)magphot.mag;em.opt.Ufloatnullablee_umag? The error on umagmagstat.error;phot.mag;em.opt.Ufloatnullablegmag? The g' band AB magnitude (2)magphot.mag;em.opt.Bfloatnullablee_gmag? The error on gmag (2)magstat.error;phot.mag;em.opt.BfloatnullablermagThe r' band AB magnitude (2)magphot.mag;em.opt.Rfloate_rmagThe error on rmag (2)magstat.error;phot.mag;em.opt.Rfloatimag? The i' band AB magnitude (2)magphot.mag;em.opt.Ifloatnullablee_imag? The error on imag (2)magstat.error;phot.mag;em.opt.Ifloatnullablezmag? The z' band AB magnitude (2)magphot.mag;em.opt.IfloatnullableFlagSextractor source extraction flag (3)meta.code.errorintS/G[0/1] Stellarity - star/galaxy classifier (4)src.class.starGalaxyfloatEll[0/1] Ellipticity, from SExtractorsrc.ellipticityfloatFWHMFull-Width at Half-Maximum (6)arcsecphys.angSizefloatReffEffective radius or half-light radius (7)arcsecphys.angSizefloatMajAxisSemi-major axis lengtharcsecphys.angSizefloatAreaIsophotal detection areaarcsec**2phys.areadoubleField[1/2] Field number: 1=NEP-E, 2=NEP-Wmeta.id;obs.fieldint