J/ApJ/902/14ivo://CDS.VizieR/J/ApJ/902/14doi:10.26093/cds/vizier.19020014CDSSteinhardt C.L.Sneppen A.Sen B.2022-11-03T08:24:52Z2022-01-20T07:51:08ZCDS support team

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

cds-question@unistra.frsupernovaeredshiftedsurveysRedshifts used in current cosmological supernova samples are measured using two primary techniques, one based on well-measured host galaxy spectral lines and the other based on supernova-dominated spectra. Here, we construct an updated Pantheon catalog with revised redshifts, redshift sources, and estimated uncertainties for the entire sample to investigate whether these two techniques yield consistent results. The best-fit cosmological parameters using these two measurement techniques disagree, with a supernova-only sample producing {Omega}_m_ 3.2{sigma} higher and H_0_ 2.5{sigma} lower than a hostz-only sample, and we explore several possible sources of bias that could result from using the lower-precision supernova-dominated redshifts. In a pilot study, we show that using a host redshift-only subsample will generically produce lower {Omega}_m_ and matter density {Omega}_m_h^2^ and slightly higher H_0_ than previous analysis which, for the Pantheon data set, could result in supernova and cosmic microwave background measurements agreeing on {Omega}_m_h^2^ despite tension in H_0_. To obtain rigorous results, though, the Pantheon catalog should be improved by obtaining host spectra for supernovae that have faded, and future surveys should be designed to use host galaxy redshifts rather than lower-precision methods.2020ApJ...902...14Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/902/14CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)II/349 : The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers+, 2016)II/333 : Sloan Digital Sky Survey-II Supernova Survey (Sako+, 2018)J/AJ/131/527 : UBVRI light curves of 44 type Ia supernovae (Jha+, 2006)J/ApJ/700/331 : Light curves of type Ia supernovae (CfA3) (Hicken+, 2009)J/AJ/139/519 : Carnegie supernova project. SNe Ia (Contreras+, 2010)J/A+A/523/A7 : Light curves of type Ia supernovae in SNLS (Guy+, 2010)J/ApJ/722/566 : Host galaxies of SNIa in SDSS-II SN survey (Lampeitl+, 2010)J/MNRAS/406/782 : Type Ia supernovae luminosities (Sullivan+, 2010)J/ApJ/742/89 : Relations between spectra & colors of SNe Ia (Foley+, 2011)J/ApJS/200/12 : CfA4: light curves for 94 type Ia SNe (Hicken+, 2012)J/ApJ/755/61 : SN Ia host galaxies SFR from SDSS-II (Smith+, 2012)J/ApJ/773/53 : Type Ia SNe spectroscopy by the CSP (Folatelli+, 2013)J/A+A/568/A22 : Joint analysis of the SDSS-II & SNLS SNe Ia (Betoule+, 2014)J/ApJ/795/44 : PS1 SNe Ia (0.02<z<0.7) griz light curves (Rest+, 2014)J/AJ/148/13 : Redshifts of 65 CANDELS supernovae (Rodney+, 2014)J/MNRAS/451/1973 : Type Ia supernovae igh-velocity features (Silverman+, 2015)J/ApJ/857/51 : Measuring dark energy data with PS1 SNe. II. (Jones+, 2018)J/ApJ/859/101 : The supernovae Ia Pantheon sample (Scolnic+, 2018)J/ApJ/876/85 : HST observations for LMC Cepheids (Riess+, 2019)J/ApJ/882/120 : CfA, CSP, BSP and LOSS spec. & phot. of SNe Ia (Wang+, 2019)http://classic.sdss.org/supernova/snlist_confirmed.html : SDSS-II SNehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/902/14https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/902/14http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/902/14https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/902/14https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/902/14http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/902/14GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/902/14/table2 (Updated Pantheon (Scolnic+ 2018, J/ApJ/859/101) catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/902/14/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/902/14/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/902/14/table2?GETtext/xml+votable180.050000true36.04320908-4.037468910.0055555555555555565/1517 2538 2856 4422-4423 4437-4438 4441 4460 4517 4521 4696 4698 4709 4758-4759 4762 4778 6814 8983 6/34 224 626 848 1593 1700 1709 2038 2169 2227 2232 2251 2254 2340 2347 2608 3086 4114 4416 4449 4577 4583 4719 4935 5004 5095 5100 5192 5591 5990 5995 6047 6062 6076-6077 6090 6101 6114 6178 6494-6495 6501 6513-6518 6521 6549 6877 6968 7044 7097 7166 7178 7198 7200 7523 7651 7681 7747 7923 8213 8435 8479 8927 9287 9338 9449 9560 9614 9698 9794 10147 10150-10151 10156-10158 10232 10391 10401 10428 10734 10743 10788 10920 10935 10955 10958 10977-10982 11064 11071 11133 11158 11252 11273 11403 11428 11430 11432-11433 11521 11672 11939 12103 12123 12288 12290 12455 12585 13399 13505 14907 15085 15093 16292 16690 17152 17237 17239 17406 17500 17660 17662-17663 17683 17686 17713 17716-17717 17726 17742 17747 17756 17761 17763 17768 17770-17771 17774 17776 17806 17809-17814 17818 17821-17822 17825 17827-17828 17830-17831 17833-17835 17837 17856 17981-17983 17997 17999 18001 18006-18007 18010-18011 18013-18014 18016-18017 18019-18022 18024-18025 18027 18030 18032-18034 18061-18063 18065-18066 18073-18075 18081 18083 18089 18091-18092 18097-18098 18112 18214 18410 18687 18751 18763 18765-18767 18769-18770 18772-18774 18777 18788-18789 18791 18797-18798 18800-18801 18834 18841 18843-18844 18849-18852 18854-18856 18858-18859 18865 18881-18882 18939 19005 19021 19023 19025-19027 19030-19031 19041 19043 19046-19047 19052 19054 19056-19058 19086-19087 19089-19091 19093-19094 19097 19099-19102 19107-19109 19111 19116-19117 19136 19138 19200 19202 19227 19241 19298 19425 19456-19458 19506 19515 19551 19581 19729 19797 19983 20031 20090 20140 20237 20279 20318 20353 21041 21138 21857 21917 22425 23013 23023 23092 23102 23182 23185-23186 23189-23193 23196-23197 23203-23206 23208 23211-23212 23214 23216-23217 23219 23234 23828 23916 25079 25333 25491 25615 25703 25889 25982 26268 26292 26395 27245 27247 27250-27251 27344-27345 27420 27491 27634 27761 27910 27912 28075 28089 28353 28368 28414 28453 28498 28572 30013 30034-30038 30042 30044 30053-30056 30065 31293 32569 32602 35956-35957 36104 36106 36128 36130 36201 36391 36473 36805 36861 36863 39627 40145 43015 44555 44587 44603 45418 48478-48479 48500-48501 49012 49149https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/902/14?format=asciidefaultJ/ApJ/902/14/table2Updated Pantheon (Scolnic+ 2018, J/ApJ/859/101) catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSupernova identifiermeta.id;meta.maincharmu[33.25/46.22] Distance modulusmagphot.mag.distModfloate_mu[0.09/0.4] Uncertainty in mumagstat.errorfloatzHel[0.0089/2.26] Heliocentric redshiftsrc.redshiftdoublezCMB[0.01/2.262] Cosmic Microwave Background frame redshiftsrc.redshiftdoublee_zCMB[0.0000049/0.04]? Uncertainty in zCMBstat.errordoublenullableRAJ2000Right Ascension in decimal degrees (J2000) (1)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000) (1)degpos.eq.dec;meta.mainSurveySurvey identifier (2)meta.idcharTypeRedshift type (H=Host (702 occurrences); S = Supernova)meta.notecharKnownKnown-error sample? (yes=450 occurrences) -- See Section 2.1.meta.codecharB14Display data from Betoule+, 2014, J/A+A/568/A22meta.ref.urlintnullablePS1snDisplay data from Jones+, 2018, J/ApJ/857/51meta.ref.urlintnullableSloanDisplay the online SDSS-DR16 data for the nearest objectmeta.ref.urlcharSimbadNameSimbad column added by the CDSmeta.idcharnullable