J/ApJ/742/89ivo://CDS.VizieR/J/ApJ/742/89doi:10.26093/cds/vizier.17420089CDSFoley R.J.Sanders N.E.Kirshner R.P.2017-09-29T09:03:18Z2013-05-23T13:53:27ZCDS support team

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

cds-question@unistra.frsupernovaevisible-astronomybroad-band-photometryspectroscopyTo understand how best to use observations of Type Ia supernovae (SNe Ia) to obtain precise and accurate distances, we investigate the relations between spectra of SNe Ia and their intrinsic colors. Using a sample of 1630 optical spectra of 255 SNe, based primarily on data from the CfA Supernova Program, we examine how the velocity evolution and line strengths of SiII(6355) and CaII H&K are related to the B-V color at peak brightness. We find that the maximum-light velocity of SiII6355 and CaII H&K and the maximum-light pseudo-equivalent width of SiII6355 are correlated with intrinsic color, with intrinsic color having a linear relation with the SiII6355 measurements. CaII H&K does not have a linear relation with intrinsic color, but lower-velocity SNe tend to be intrinsically bluer. Combining the spectroscopic measurements does not improve intrinsic color inference. The intrinsic color scatter is larger for higher-velocity SNe Ia - even after removing a linear trend with velocity - indicating that lower-velocity SNe Ia are more "standard crayons". Employing information derived from SN Ia spectra has the potential to improve the measurements of extragalactic distances and the cosmological properties inferred from them.2011ApJ...742...89Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/742/89CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)J/ApJS/200/12 : CfA4: light curves for 94 type Ia SNe (Hicken+, 2012)J/ApJ/731/120 : Intrinsic SN Ia light curves (Mandel+, 2011)J/MNRAS/410/1262 : Supernova Legacy Survey. Type Ia supernovae (Walker+, 2011)J/ApJ/730/119 : HST/WFC3 observations of Cepheids in SNIa hosts (Riess+, 2011)J/ApJS/190/418 : Light curves for 165 SNe (Ganeshalingam+, 2010)J/A+A/523/A7 : Light curves of type Ia supernovae in SNLS (Guy+, 2010)J/AJ/137/3731 : ESSENCE high-redshift supernova (Foley+, 2009)J/ApJ/700/1097 : Light curve parameters of SN Ia (Hicken+, 2009)J/ApJ/699/L139 : Spectral parameters of SNe Ia (Wang+, 2009)J/A+A/500/L17 : Spectral flux ratio of SN Ia (Bailey+, 2009)J/ApJ/700/331 : Light curves of type Ia supernovae (CfA3) (Hicken+, 2009)J/A+A/507/85 : ESO/VLT 3rd year type Ia supernova data set (Balland+, 2009)J/AJ/135/1598 : Optical spectroscopy of type Ia supernovae (Matheson+, 2008)J/AJ/135/1766 : Sloan Digital Sky Survey-II supernova survey (Zheng+, 2008)J/A+A/477/717 : Spectroscopy of Type Ia supernovae (Bronder+, 2008)J/MNRAS/377/1531 : Optical + IR photometry of SN 2004eo (Pastorello+, 2007)J/MNRAS/369/1880 : Photometry of SN 2003cg (Elias-Rosa+, 2006)J/AJ/131/527 : UBVRI light curves of 44 type Ia supernovae (Jha+, 2006)J/AJ/131/1648 : Type Ia supernovae at high and low redshifts (Blondin+, 2006)J/AJ/112/2408 : Light Curves of 29 SNe (Hamuy+ 1996)http://www.cfa.harvard.edu/supernova/ : CfA Supernova group home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/742/89https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/742/89http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/742/89https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/742/89https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/742/89http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/742/89GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/742/89/snspec (List of the 16 SNe with spectral properties in table2 missing in table1 (added by CDS))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/742/89/snspec?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/742/89/snspec?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/742/89/snspec?GETtext/xml+votable180.050000true252.463041740.43216670.005555555555555556Cone search capability for table J/ApJ/742/89/table1 (Object information)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/742/89/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/742/89/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/742/89/table1?GETtext/xml+votable180.050000true188.62320832.19980560.0055555555555555566/34 224 248 626 928 1527 1593 1677 1700 1701 1796 2038 2142 2169 2227 2232 2251 2254 2347 2353 2379 2391 2412 2473 2608 2641 3393 4401 4416 4447 4577 4583 4684 4719 4807 4993 5006 5095 5139 5632 5639 5680 5905 5975 5995 6062 6101 6114 6178 6549 6877 6936 6962 6968 7044 7104 7166 7198 7241 7369 7659 7747 7783 7923 8064 8435 8479 8522 8526 8556 8763 8927 9136 9287 9449 9560 9614 9640 9794 9840 10203 10232 10379 10391 10397 10401 10428 10563 10734 10767 10789 10817 10858 11064 11158 11181 11273 11496 11672 11824 12103 12123 12367 12455 13313 13399 13459 13505 13514 14009 14733 14834 14882 14907 15056 15085 15548 15954 15955 16292 16690 17152 17197 17237 17239 17340 17500 17614 17817 17818 18017 18081 18206 18296 18325 18735 18895 19084 19087 19116 19227 19241 19298 19506 19515 19551 19554 19560 19797 19958 20014 20090 20140 20237 20279 20283 20370 21138 21300 21857 22425 22826 23013 23179 23294 23405 23828 23916 24131 24716 24920 25078 25079 25333 25344 25439 25482 25491 25513 25521 25615 25769 25850 25889 25960 25982 26117 26268 26271 26336 26392 26575 26714 26914 27174 27348 27367 27420 27426 27491 27512 27634 27728 27761 27773 27918 27945 28035 28075 28089 28112 28167 28249 28299 28353 28356 28368 28414 28453 28498 28593 30044 31218 31230 31293 31313 31628 32129 32136 32307 32340 32561 32569 32602 32620 34361 34540 36045 36131 36287 36473 36805 39658 39677 40252 40294 40337 40379 40906 43262 43828 44000 44005 44007 44026 44915 45036 45983 46882 48075 48459 48625https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/742/89?format=asciiOpticaldefaultJ/ApJ/742/89/table2Spectral propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNSN identificationmeta.id;meta.maincharPhasePhase (days relative to maximum)dtime.phasefloatV(SiII)Velocity of Si II line (10^3^km/s)Mm/sspect.dopplerVelocfloate_V(SiII)Uncertainty in VSiII (10^3^km/s)Mm/sstat.errorfloatW(SiII)Si II line pseudo-equivalent width in {AA}0.1nmspect.line.eqWidthfloate_W(SiII)Uncertainty in W(SiII) in {AA}0.1nmstat.errorfloatV(CaII)b? Velocity of blue Ca II line (10^3^km/s)Mm/sspect.dopplerVelocfloatnullablee_V(CaII)b? Uncertainty in VCaIIb (10^3^km/s)Mm/sstat.errorfloatnullableV(CaII)r? Velocity of red Ca II line (10^3^km/s)Mm/sspect.dopplerVelocfloatnullablee_V(CaII)r? Uncertainty in VCaIIr (10^3^km/s)Mm/sstat.errorfloatnullableW(CaII)? Ca II line pseudo-equivalent width in {AA}0.1nmspect.line.eqWidthfloatnullablee_W(CaII)? Uncertainty in W(CaII) in {AA}0.1nmstat.errorfloatnullableRefReference (see refs.dat file)meta.ref;pos.frameintJ/ApJ/742/89/refsReferencesRefReference numbermeta.id;meta.mainintprimaryAuthAuthor's name(s)meta.bib.authorcharCommCommentsmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBibCodeBibcodemeta.bib.bibcodecharJ/ApJ/742/89/snspecList of the 16 SNe with spectral properties in table2 missing in table1 (added by CDS)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNSN identificationmeta.id;meta.maincharprimaryo_SNSpectral observations in table2meta.ref.urlintnullableVCVelocity / line width curvemeta.ref.urlcharSNcatCross-match with the LOSS (J/ApJS/190/418) and CfA3 (J/ApJ/700/331) catalogs within 3"meta.ref.urlintnullableBsnDisplay the Asiago SN catalog (B/sn)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.refchar_RAPositions from Simbad database (right ascension part)degpos.eq.ra;meta.main_DEPositions from Simbad database (declination part)degpos.eq.dec;meta.mainJ/ApJ/742/89/table1Object informationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNSN identificationmeta.id;meta.maincharprimaryo_SNSpectral observations in table2meta.ref.urlintnullableVCVelocity / line width curvemeta.ref.urlcharf_SN[d] SN with Cepheid distance (1)meta.codecharzCMBRedshift relative to the CMBsrc.redshiftfloatVmag? V band magnitude at maximum; LOSS system (2)magphot.mag;em.opt.Vfloatnullablee_Vmag? Uncertainty in Vmagmagstat.error;phot.mag;em.opt.VfloatnullableDm15B? Magnitude decline from peak brightness at 15 days after B band maximum; LOSS system (3)magsrc.var.amplitudefloatnullablee_Dm15B? Uncertainty in Dm15Bmagstat.errorfloatnullableB-V? The (B_max_-V_max_) color index; LOSS systemmagphot.color;em.opt.B;em.opt.Vfloatnullablee_B-V? Uncertainty in B-Vmagstat.error;phot.color;em.opt.BfloatnullableV(SiII)? SiII line velocity at maximum (10^3^km/s)Mm/sspect.dopplerVelocfloatnullablee_V(SiII)? Uncertainty in V(SiII) (10^3^km/s)Mm/sstat.errorfloatnullableW(SiII)? Si II line pseudo-equivalent width at maximum (4)0.1nmspect.line.eqWidthfloatnullablee_W(SiII)? Uncertainty in W(SiII) (4)0.1nmstat.errorfloatnullableV(CaII)? "red" component Ca II H&K line velocity at maximum ((10^3^km/s)Mm/sspect.dopplerVelocfloatnullablee_V(CaII)? Uncertainty in V(CaII) (10^3^km/s)Mm/sstat.errorfloatnullableW(CaII)? Ca II H&K line pseudo-equivalent width at maximum (4)0.1nmspect.line.eqWidthfloatnullablee_W(CaII)? Uncertainty in W(CaII) (4)0.1nmstat.errorfloatnullableSNcatCross-match with the LOSS (J/ApJS/190/418) and CfA3 (J/ApJ/700/331) catalogs within 3"meta.ref.urlintnullableBsnDisplay the Asiago SN catalog (B/sn)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.refchar_RAPositions from Simbad database (right ascension part)degpos.eq.ra;meta.main_DEPositions from Simbad database (declination part)degpos.eq.dec;meta.main