J/ApJ/699/L139ivo://CDS.VizieR/J/ApJ/699/L139doi:10.26093/cds/vizier.16999139CDSWang X.Filippenko A.V.Ganeshalingam M.Li W.Silverman J.M.Wang L.,Chornock R.Foley R.J.Gates E.L.Macomber B.Serduke F.J.D.,Steele T.N.Wong D.S.2017-12-05T05:09:42Z2011-07-21T07:20:50ZCDS support team

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

cds-question@unistra.frsupernovaeapparent-magnitudeWe study the observables of 158 relatively normal Type Ia supernovae (SNe Ia) by dividing them into two groups in terms of the expansion velocity inferred from the absorption minimum of the SiII{lambda}6355 line in their spectra near B-band maximum brightness. One group ("Normal") consists of normal SNe Ia populating a narrow strip in the SiII velocity distribution, with an average expansion velocity <{nu}>=10600+/-400km/s near B maximum; the other group ("HV") consists of objects with higher velocities, {nu}>~11800km/s. Compared with the Normal group, the HV one shows a narrower distribution in both the peak luminosity and the luminosity decline rate {Delta}m_15_. In particular, their B-V colors at maximum brightness are found to be on average redder by ~0.1mag, suggesting that they either are associated with dusty environments or have intrinsically red B-V colors. The HV SNe Ia are also found to prefer a lower extinction ratio RV~1.6 (versus ~2.4 for the Normal ones). Applying such an absorption-correction dichotomy to SNe Ia of these two groups remarkably reduces the dispersion in their peak luminosity from 0.178mag to only 0.125mag.2009ApJ...699L.139Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/699/L139CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)J/ApJ/607/665 : Type Ia supernovae at z>1 discovered by HST (Riess+, 2004)J/ApJ/645/488 : SN type Ia luminosities (Wang+, 2006)J/ApJ/659/122 : Improved distances to type Ia supernovae (Jha+, 2007)J/MNRAS/389/1871 : Type Ia supernovae candidates from SDSS (Horesh+, 2008)J/ApJ/673/981 : Type Ia supernova rates with HST ACS (Kuznetsova+, 2008)J/AJ/135/1598 : Optical spectroscopy of type Ia supernovae (Matheson+, 2008)J/A+A/477/717 : Spectroscopy of Type Ia supernovae (Bronder+, 2008)J/AJ/136/2306 : SDSS-II SN survey, 2005 (Holtzman+, 2008)J/A+A/500/L17 : Spectral flux ratio of SN Ia (Bailey+, 2009)J/A+A/507/85 : ESO/VLT 3rd year type Ia supernova data set (Balland+, 2009)J/MNRAS/406/782 : Type Ia supernovae luminosities (Sullivan+, 2010)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/699/L139https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/699/L139http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/699/L139https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/699/L139https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/699/L139http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/699/L139GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/699/L139/table1 (Observed parameters of the SN Ia sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/699/L139/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/699/L139/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/699/L139/table1?GETtext/xml+votable180.050000true170.058041713.005250.0055555555555555566/248 1796 2142 2227 2232 2251 2254 2340 2347 2353 3393 4401 4447 4583 4684 4993 5006 5100 5975 6062 6101 6114 6178 6936 7044 7166 7488 7747 7783 7923 8064 8403 8526 8556 8927 9136 9449 9640 9794 9840 10397 10563 10767 10789 10817 11064 11181 11246 11273 11496 11672 12367 12455 13350 13399 13459 13505 14009 14882 14907 15056 15548 16852 17152 17197 17239 17340 17401 17500 17614 17736 17817 17818 17840 18081 18296 18394 18735 18753 18895 19051 19227 19298 19515 19554 20014 20090 20140 20237 20283 20370 21109 21138 21300 21857 22826 23013 23179 23294 23828 24716 24920 25078 25079 25333 25344 25491 25513 25615 25769 25889 25960 26210 26271 26392 26575 27367 27426 27491 27512 27728 27918 27945 27947 28035 28075 28089 28167 28249 28299 28353 28368 28579 28593 30044 31218 31230 32136 32561 32569 32602 32620 34361 34540 36045 36287 39677 40379 43828 44000 44915 45041 46882 47170 48898https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/699/L139?format=asciiOpticaldefaultJ/ApJ/699/L139/table1Observed parameters of the SN Ia samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNSupernova identification (YYYYaa)meta.id;meta.maincharf_SN[d] SN-Ia with Cepheid distancemeta.codecharczRecession velocity (2)km/sphys.velocintVMAGAbsolute V band magnitude at maximummagphys.magAbs;em.opt.Vfloate_VMAGThe 1{sigma} uncertainty in VMAGmagstat.errorfloatDm15Luminosity decline rate {Delta}m_15_ (3)magsrc.var.amplitudefloate_Dm15The 1{sigma} uncertainty in Delm15magstat.errorfloatB-VThe (B-V) color index at maximummagphot.color;em.opt.B;em.opt.Vfloate_B-VThe 1{sigma} uncertainty in B-Vmagstat.error;phot.color;em.opt.BfloatE(B-V)Host galaxy (B-V) color excessmagphot.color.excessfloate_E(B-V)Uncertainty in E(B-V)magstat.errorfloatTType? RC3 host galaxy T morphologysrc.morph.typefloatnullablef_TType[?] Uncertainty flag on Morphmeta.codecharTypeSN type ("HV" or "N" for normal) (4)meta.codecharW06Display data from Wang et al., 2006, Cat. J/ApJ/645/488meta.ref.urlcharSimbadSimbad column added by the CDScharNEDSimbad column added by the CDSchar_RAPositions from Simbad (right ascension part)degpos.eq.ra;meta.main_DEPositions from Simbad (declination part)degpos.eq.dec;meta.main