J/ApJ/738/162ivo://CDS.VizieR/J/ApJ/738/162doi:10.26093/cds/vizier.17380162CDSSako M.Bassett B.Connolly B.Dilday B.Cambell H.Frieman J.A.,Gladney L.Kessler R.Lampeitl H.Marriner J.Miquel R.Nichol R.C.,Schneider D.P.Smith M.Sollerman J.2017-11-06T12:24:09Z2013-02-26T14:51:04ZCDS support team

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

cds-question@unistra.frextinctionredshiftedsupernovaephotometrysurveysWe analyze the three-year Sloan Digital Sky Survey II (SDSS-II) Supernova (SN) Survey data and identify a sample of 1070 photometric Type Ia supernova (SN Ia) candidates based on their multiband light curve data. This sample consists of SN candidates with no spectroscopic confirmation, with a subset of 210 candidates having spectroscopic redshifts of their host galaxies measured while the remaining 860 candidates are purely photometric in their identification. We describe a method for estimating the efficiency and purity of photometric SN Ia classification when spectroscopic confirmation of only a limited sample is available, and demonstrate that SN Ia candidates from SDSS-II can be identified photometrically with ~91% efficiency and with a contamination of ~6%. Although this is the largest uniform sample of SN candidates to date for studying photometric identification, we find that a larger spectroscopic sample of contaminating sources is required to obtain a better characterization of the background events. A Hubble diagram using SN candidates with no spectroscopic confirmation, but with host galaxy spectroscopic redshifts, yields a distance modulus dispersion that is only ~20%-40% larger than that of the spectroscopically confirmed SN Ia sample alone with no significant bias. A Hubble diagram with purely photometric classification and redshift-distance measurements, however, exhibits biases that require further investigation for precision cosmology.2011ApJ...738..162Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/738/162CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)J/A+A/526/A28 : SDSS-II supernovae NTT and NOT spectroscopy (Oestman+, 2011)J/ApJ/713/1026 : SN Ia rate at redshift <~0.3 from SDSS-II (Dilday+, 2010)J/ApJ/722/566 : Host galaxies of SNIa in SDSS-II SN survey (Lampeitl+, 2010)J/AJ/139/519 : Carnegie supernova project. SNe Ia (Contreras+, 2010)J/MNRAS/406/782 : Type Ia supernovae luminosities (Sullivan+, 2010)J/ApJ/700/331 : Light curves of type Ia supernovae (CfA3) (Hicken+, 2009)J/ApJS/185/32 : First-year SDSS-II SN results (Kessler+, 2009)J/AJ/136/2306 : SDSS-II Supernova survey, 2005 (Holtzman+, 2008)J/AJ/135/1766 : Sloan Digital Sky Survey-II supernova survey (Zheng+, 2008)J/AJ/135/348 : SDSS-II SNe survey: search and follow-up (Sako+, 2008)J/MNRAS/389/1871 : Type Ia supernovae candidates from SDSS (Horesh+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/738/162https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/738/162http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/738/162https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/738/162https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/738/162http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/738/162GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/738/162/table3 (SDSS-II z_host_-Ia Candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/738/162/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/738/162/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/738/162/table3?GETtext/xml+votable180.050000true336.217920.6507250.005555555555555556Cone search capability for table J/ApJ/738/162/table4 (SDSS-II Photo-Ia Candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/738/162/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/738/162/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/738/162/table4?GETtext/xml+votable180.050000true40.56077611-0.862156940.0055555555555555565/4437 4438 4441 4454 4457 4458 4501 4502 4505 4506 4517 4518 4521 4693 4694 4697 4698 4709 4710 4714 4757 4758 4762 4773 4774 4778 5786 5797 5798 5801 5802 7509 7510 9215 6/0 2 12288 12289 17405 17406 17661 17663 17725 17726 17727 17742 17743 17745 17746 17747 17756 17757 17761 17762 17763 17768 17770 17771 17772 17773 17774 17776 17778 17805 17806 17807 17809 17810 17812 17813 17815 17820 17821 17822 17825 17826 17827 17836 17837 17840 17841 17842 17856 17857 17858 17981 17982 17983 17997 17999 18001 18003 18012 18014 18017 18018 18019 18028 18029 18030 18032 18033 18034 18061 18062 18063 18066 18067 18076 18077 18078 18082 18083 18089 18090 18091 18092 18093 18094 18096 18097 18112 18113 18114 18176 18177 18178 18685 18686 18687 18749 18750 18751 18766 18767 18769 18770 18771 18780 18781 18782 18786 18787 18796 18800 18801 18802 18829 18830 18831 18833 18834 18835 18844 18846 18849 18850 18851 18852 18853 18854 18860 18862 18864 18866 18880 18882 19005 19007 19022 19023 19025 19026 19027 19036 19037 19038 19041 19042 19043 19044 19045 19047 19052 19053 19054 19056 19057 19058 19085 19086 19087 19089 19090 19091 19100 19105 19106 19107 19108 19110 19111 19116 19117 19120 19121 19122 19136 19137 19138 19200 19201 19202 19456 19457 19458 23102 23103 23139 23181 23182 23183 23185 23186 23187 23196 23197 23201 23202 23203 23212 23214 23216 23217 23218 23232 23233 23234 30030 30031 30033 30034 30035 30044 30045 30046 30049 30053 30054 30055 30060 30061 30064 30065 30066 30102 30146 49149https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/738/162?format=asciiOpticaldefaultJ/ApJ/738/162/table3SDSS-II z_host_-Ia CandidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCID[703/22006] Internal SDSS-II SN candidate designationmeta.id;meta.mainintRAJ2000[-53/58.7] Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-1.3/1.3] Declination (J2000)degpos.eq.dec;meta.mainz[0.10/0.50] Spectroscopic redshiftsrc.redshiftfloate_z[0/0.01] Uncertainty in zstat.error;src.redshiftfloatAV[-0.68/2.37] V-band extinctionmagphys.absorption;em.opt.VfloatB_AVThe 1{sigma} upper V-band extinction limitmagphys.absorption;em.opt.V;stat.maxfloatb_AVThe 1{sigma} lower V-band extinction limitmagphys.absorption;em.opt.V;stat.minfloatdm15[0.61/1.74] Phillips {Delta}m_15_(B) (G1)magsrc.var.amplitudefloatB_dm15The 1{sigma} upper Phillips {Delta}m_15_(B) limitmagphot.mag;stat.maxfloatb_dm15The 1{sigma} lower Phillips {Delta}m_15_(B) limitmagphot.mag;stat.minfloatPzIaBayesian SN Ia probability (1)stat.fit.goodnessfloatchi2[0.74/1.8] Best-fit reduced chi-squaredstat.fit.chi2;meta.modelledfloatSimbadSimbad column added by the CDSmeta.refcharJ/ApJ/738/162/table4SDSS-II Photo-Ia CandidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCID[822/21890] Internal SDSS-II SN candidate designationmeta.id;meta.mainintRAJ2000[-58.2/58.8] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-1.3/1.3] Declination (J2000)degpos.eq.dec;meta.mainzph[0.01/0.7] Photometric redshiftsrc.redshiftfloatB_zphThe 1{sigma} upper photometric redshiftsrc.redshift.phot;stat.maxfloatb_zphThe 1{sigma} lower photometric redshiftsrc.redshift.phot;stat.minfloatAV[-0.94/5] V-band extinctionmagphys.absorption;em.opt.VfloatB_AVThe 1{sigma} upper V-band extinction limitmagphys.absorption;em.opt.V;stat.maxfloatb_AVThe 1{sigma} lower V-band extinction limitmagphys.absorption;em.opt.V;stat.minfloatdm15[0.6/1.77] Phillips {Delta}m_15_(B) (G1)magsrc.var.amplitudefloatB_dm15The 1{sigma} upper Phillips {Delta}m_15_(B) limitmagphot.mag;stat.maxfloatb_dm15The 1{sigma} lower Phillips {Delta}m_15_(B) limitmagphot.mag;stat.minfloatPIaBayesian SN Ia probability (1)stat.fit.goodnessfloatchi2[0.51/1.6] Best-fit reduced chi-squaredstat.fit.chi2;meta.modelledfloatSimbadSimbad column added by the CDSmeta.refchar