J/ApJ/673/981ivo://CDS.VizieR/J/ApJ/673/981doi:10.26093/cds/vizier.16730981CDSKuznetsova N.Barbary K.Connolly B.Kim A.G.Pain R.Roe N.A.,Aldering G.Amanullah R.Dawson K.Doi M.Fadeyev V.Fruchter A.S.,Gibbons R.Goldhaber G.Goobar A.Gude A.Knop R.A.Kowalski M.,Lidman C.Morokuma T.Meyers J.Perlmutter S.Rubin D.Schlegel D.J.,Spadafora A.L.Stanishev V.Strovink M.Suzuki N.Wang L.Yasuda N.,(Supernova Cosmology Project)2012-04-18T08:39:56Z2010-05-23T17:51:54ZCDS support team

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

cds-question@unistra.frsupernovaeredshiftedWe present a new measurement of the volumetric rate of SNe Ia up to a redshift of 1.7, using the HST GOODS data combined with an additional HST data set covering the GOODS-North field collected in 2004. We employ a novel technique that does not require spectroscopic data for identifying SNe Ia (although spectroscopic measurements of redshifts are used for over half the sample); instead, we employ a Bayesian approach using only photometric data to calculate the probability that an object is an SN Ia. This Bayesian technique can easily be modified to incorporate improved priors on SN properties, and it is well-suited for future high-statistics SN searches in which spectroscopic follow-up of all candidates will be impractical. Here the method is validated on both ground- and space-based SN data having some spectroscopic follow-up. We combine our volumetric rate measurements with low-redshift SN data and fit to a number of possible models for the evolution of the SN Ia rate as a function of redshift. The data do not distinguish between a flat rate at redshift >0.5 and a previously proposed model, in which the Type Ia rate peaks at redshift ~1 due to a significant delay from star formation to the SN explosion. Except for the highest redshifts, where the signal-to-noise ratio is generally too low to apply this technique, this approach yields uncertainties that are smaller than or comparable to previous work.2008ApJ...673..981Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/673/981CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/673/981https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/673/981http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/673/981https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/673/981https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/673/981http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/673/981GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/673/981/tables (Candidates Selected at the end of stage 2 for Samples 1, 2, 3 and 4 (tables 4-7 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/673/981/tables?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/673/981/tables?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/673/981/tables?GETtext/xml+votable180.050000true189.2789083362.154391670.0055555555555555566/11252 35935https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/673/981?format=asciiOpticaldefaultJ/ApJ/673/981/tablesCandidates Selected at the end of stage 2 for Samples 1, 2, 3 and 4 (tables 4-7 of the paper)z? Redshiftsrc.redshiftfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSam[1/4] Sample numbermeta.id;meta.mainintCandCandidate number (1)meta.idintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainn_z[:u] Uncertainty flag or u for Unconstrained (2)meta.notechare_z? rms uncertainty on zstat.error;src.redshiftfloatnullableSourceSources used for the redshift and redshift error determinationmeta.notecharr_zReferences for the sources (3)meta.ref;pos.framecharComComments (4)meta.notecharProb? Probability of SN Ia typemeta.notefloatnullablen_Prob[n] n stands for a special category of candidates designated as "anomalies," as described in Sect. 3.3.meta.notechar