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dc.creatorDilday, Benjaminen_US
dc.creatorSmith, Mathewen_US
dc.creatorBassett, Bruceen_US
dc.creatorBecker, Andrewen_US
dc.creatorBender, Ralfen_US
dc.creatorCastander, Franciscoen_US
dc.creatorCinabro, Daviden_US
dc.creatorFilippenko, Alexei V.en_US
dc.creatorFrieman, Joshua A.en_US
dc.creatorGalbany, Lluisen_US
dc.creatorGarnavich, Peter M.en_US
dc.creatorGoobar, Arielen_US
dc.creatorHopp, Ulrichen_US
dc.creatorIhara, Yutakaen_US
dc.creatorJha, Saurabh W.en_US
dc.creatorKessler, Richarden_US
dc.creatorLampeitl, Huberten_US
dc.creatorMarriner, Johnen_US
dc.creatorMiquel, Ramonen_US
dc.creatorMolla, Mercedesen_US
dc.creatorNichol, Robert C.en_US
dc.creatorNordin, Jakoben_US
dc.creatorRiess, Adam G.en_US
dc.creatorSako, Masaoen_US
dc.creatorSchneider, Donald P.en_US
dc.creatorSollerman, Jesperen_US
dc.creatorWheeler, J. Craigen_US
dc.creatorOstman, Lindaen_US
dc.creatorBizyaev, Dmitryen_US
dc.creatorBrewington, Howarden_US
dc.creatorMalanushenko, Elenaen_US
dc.creatorMalanushenko, Viktoren_US
dc.creatorOravetz, Danen_US
dc.creatorPan, Kaikeen_US
dc.creatorSimmons, Audreyen_US
dc.creatorSnedden, Stephanieen_US
dc.date.accessioned2016-04-28T19:35:40Z
dc.date.available2016-04-28T19:35:40Z
dc.date.issued2010-04en
dc.identifierdoi:10.15781/T2GJ66
dc.identifier.citationDilday, Benjamin, Mathew Smith, Bruce Bassett, Andrew Becker, Ralf Bender, Francisco Castander, David Cinabro et al. "Measurements of the Rate of Type Ia Supernovae at Redshift 0.3 from the Sloan Digital Sky Survey II Supernova Survey." The Astrophysical Journal, Vol. 713, No. 2 (Apr., 2010): 1026.en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/34846
dc.description.abstractWe present ameasurement of the volumetric Type Ia supernova (SN Ia) rate based on data from the Sloan Digital Sky Survey II (SDSS-II) Supernova Survey. The adopted sample of supernovae (SNe) includes 516 SNe Ia at redshift z less than or similar to 0.3, of which 270(52%) are spectroscopically identified as SNe Ia. The remaining 246 SNe Ia were identified through their light curves; 113 of these objects have spectroscopic redshifts from spectra of their host galaxy, and 133 have photometric redshifts estimated from the SN light curves. Based on consideration of 87 spectroscopically confirmed non-Ia SNe discovered by the SDSS-II SN Survey, we estimate that 2.04+(1.61%)(-0.95) -0.95% of the photometric SNe Ia may be misidentified. The sample of SNe Ia used in this measurement represents an order of magnitude increase in the statistics for SN Ia rate measurements in the redshift range covered by the SDSS-II Supernova Survey. If we assume an SN Ia rate that is constant at low redshift (z < 0.15), then the SN observations can be used to infer a value of the SN rate of rV = (2.69(-0.30-0.01)(+ 0.34+ 0.21)) x 10(-5) SNe yr(-1) Mpc(-3) (H(0)/(70 km s(-1) Mpc(-1)))(3) at a mean redshift of similar to 0.12, based on 79 SNe Ia of which 72 are spectroscopically confirmed. However, the large sample of SNe Ia included in this study allows us to place constraints on the redshift dependence of the SN Ia rate based on the SDSS-II Supernova Survey data alone. Fitting a power-law model of the SN rate evolution, rV (z) = A(p) x((1 + z)/(1 + z(0)))(nu), over the redshift range 0.0 < z < 0.3 with z0 = 0.21, results in A(p) = (3.43+(+0.15)(-.015) SNe yr-1 Mpc-3 (H(0)/(70 km s(-1) Mpc(-1)))(3) and nu = 2.04(-0.89)(+0.89).en_US
dc.description.sponsorshipNSF 0114422, PHY-0551142, AST-0607485, AST-0908886en_US
dc.description.sponsorshipKavli Foundationen_US
dc.description.sponsorshipUS Department of Energy DE-FG02-08ER41562, DE-FG02-08ER41563en_US
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.subjectsupernovae: generalen_US
dc.subjecthubble-space-telescopeen_US
dc.subjectabsolute magnitude distributionsen_US
dc.subjectdark energyen_US
dc.subjectstar-formationen_US
dc.subjectlegacy surveyen_US
dc.subjectlight curvesen_US
dc.subjectconstraintsen_US
dc.subjectsystemen_US
dc.subjectdiscoveriesen_US
dc.subjectphotometryen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleMeasurements Of The Rate Of Type Ia Supernovae At Redshift Less Than Or Similar To 0.3 From The Sloan Digital Sky Survey II Supernova Surveyen_US
dc.typeArticleen_US
dc.description.departmentAstronomyen_US
dc.identifier.Filename2010_04_iasupernovae.pdfen_US
dc.rights.restrictionOpenen_US
dc.identifier.doi10.1088/0004-637x/713/2/1026en_US
dc.contributor.utaustinauthorWheeler, J. Craigen_US
dc.relation.ispartofserialAstrophysical Journalen_US


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