J/ApJ/893/143ivo://CDS.VizieR/J/ApJ/893/143doi:10.26093/cds/vizier.18930143CDSKawabata M.Maeda K.Yamanaka M.Nakaoka T.Kawabata K.S.Adachi R.,Akitaya H.Burgaz U.Hanayama H.Horiuchi T.Hosokawa R.Iida K.,Imazato F.Isogai K.Jiang J.-A.Katoh N.Kimura H.Kino M.Kuroda D.,Maehara H.Matsubayashi K.Morihana K.Murata K.L.Nagao T.Niwano M.,Nogami D.Oeda M.Ono T.Onozato H.Otsuka M.Saito T.Sasada M.,Shiraishi K.Sugiyama H.Taguchi K.Takahashi J.Takagi K.Takagi S.,Takayama M.Tozuka M.Sekiguchi K.2022-03-07T07:30:20Z2021-11-04T07:56:54ZCDS support team

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

cds-question@unistra.frsupernovaeinfrared-photometryvisible-astronomybroad-band-photometryultraviolet-astronomyspectroscopyWe present optical observations of the Type Ia supernova (SN) 2019ein, starting two days after the estimated explosion date. The spectra and light curves show that SN 2019ein belongs to a high-velocity (HV) and broad-line group with a relatively rapid decline in the light curves ({Delta}m_15_(B)=1.36+/-0.02mag) and a short rise time (15.37+/-0.55days). The SiII{lambda}6355 velocity, associated with a photospheric component but not with a detached high-velocity feature, reached ~20000km/s 12 days before the B-band maximum. The line velocity, however, decreased very rapidly and smoothly toward maximum light, to ~13000km/s, which is relatively low among HV SNe. This indicates that the speed of the spectral evolution of HV SNe Ia is correlated with not only the velocity at maximum light, but also the light-curve decline rate, as is the case for normal-velocity (NV) SNeIa. Spectral synthesis modeling shows that the outermost layer at >17000km/s is well described by an O-Ne-C burning layer extending to at least 25000km/s, and there is no unburnt carbon below 30000km/s; these properties are largely consistent with the delayed detonation scenario and are shared with the prototypical HV SN 2002bo despite the large difference in {Delta}m_15_(B). This structure is strikingly different from that derived for the well-studied NV SN 2011fe. We suggest that the relation between the mass of ^56^Ni (or {Delta}m_15_) and the extent of the O-Ne-C burning layer provides an important constraint on the explosion mechanism(s) of HV and NV SNe.2020ApJ...893..143Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/893/143CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-2014)V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)J/A+A/471/527 : Spectroscopy of SN 2005cf (Garavini+, 2007)J/MNRAS/384/107 : VRIJHK photometry of SN 2002cv (Elias-Rosa+, 2008)J/ApJ/699/L139 : Spectral parameters of SNe Ia (Wang+, 2009)J/PASP/122/1 : BVRI light curves of SN 2007gi (Zhang+, 2010)J/ApJ/742/89 : Relations between spectra & colors of SNe Ia (Foley+, 2011)J/AJ/143/126 : Spectroscopy of 462 nearby Type Ia SNe (Blondin+, 2012)J/MNRAS/425/1789 : Berkeley supernova Ia program. I. (Silverman+, 2012)J/A+A/554/A27 : 2011fe spectrophotometric time series (Pereira+, 2013)J/other/Sci/340.170 : Classifications of 188 SNe Ia (Wang+, 2013)J/ApJ/826/144 : Follow-up observations of SNIa ASASSN-14lp (Shappee+, 2016)J/ApJ/870/L1 : K2 obs. of type Ia supernova SN 2018oh (Dimitriadis+, 2019)J/A+A/627/A174 : Early light curve of SN 2013gy (Holmbo+, 2019)J/ApJ/870/13 : K2 LC alternative analysis of ASASSN-18bt (Shappee+, 2019)J/ApJ/882/120 : CfA, CSP, BSP and LOSS spec. & phot. of SNe Ia (Wang+, 2019)J/MNRAS/499/1424 : Properties of 407 SNe and their 394 hosts (Hakobyan+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/893/143https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/893/143http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/893/143https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/893/143https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/893/143http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/893/143GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap3.464771778314058e-19 1.125835480691034e-18UVOpticalInfrareddefaultJ/ApJ/893/143/table2Log of optical observations of SN 2019einRmag[14.05/17.62]? R band magnitudemagphot.mag;em.opt.RfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObs[2019] Observation Date, Yeartime.epoch;obsMJD[58604.8/58668.5] Modified Julian Date (JD-2400000.5)dtime.epochfloatPhase[-13.4/50.3] Phase, relative to the epoch of B-band maximum (MJD=58618.24)dtime.phasefloatUmag[13.6/14.31]? U band magnitudemagphot.mag;em.opt.Ufloatnullablee_Umag[0.09/0.5]? Uncertainty in Umagmagstat.error;phot.magfloatnullableBmag[13.97/18.26]? B band magnitudemagphot.mag;em.opt.Bfloatnullablee_Bmag[0.013/0.11]? Uncertainty in Bmagmagstat.error;phot.magfloatnullablegmag[13.98/16.6]? g' band magnitudemagphot.mag;em.opt.Bfloatnullablee_gmag[0.003/0.07]? Uncertainty in gmagmagstat.error;phot.magfloatnullableVmag[13.93/18.01]? V band magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag[0.012/0.2]? Uncertainty in Vmagmagstat.error;phot.magfloatnullablee_Rmag[0.017/0.14]? Uncertainty in Rmagmagstat.error;phot.magfloatnullableImag[14.08/17.9]? I band magnitudemagphot.mag;em.opt.Ifloatnullablee_Imag[0.02/0.1]? Uncertainty in Imagmagstat.error;phot.magfloatnullableTelTelescope (G1)meta.id;instr.telcharInstInstrument (G2)meta.id;instrcharJ/ApJ/893/143/table3Log of NIR observations of SN 2019einrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObs[2019] Observation Date, Yeartime.epoch;obsMJD[58606.7/58658.6] Modified Julian Date (JD-2400000.5)dtime.epochfloatPhase[-11.5/40.4] Phase relative to the epoch of B-band maximum (MJD=58618.24)dtime.phasefloatJmag[14.45/16.32]? J band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag[0.019/0.2]? Uncertainty in Jmagmagstat.error;phot.magfloatnullableHmag[14.68/16.09]? H band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag[0.03/0.5]? Uncertainty in Hmagmagstat.error;phot.magfloatnullableKsmag[14.47/15.11]? Ks band magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag[0.027/0.23]? Uncertainty in Ksmagmagstat.error;phot.magfloatnullableTelTelescope (G1)meta.id;instr.telcharInstInstrument (G2)meta.id;instrcharJ/ApJ/893/143/table4Log of Swift/UVOT observations of SN 2019einrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObs[2019] Observation Date, Yeartime.epoch;obsMJD[58605.4/58630.2] Modified Julian Date (JD-2400000.5)dtime.epochfloatPhase[-12.8/12] Phase relative to the epoch of B-band maximum (MJD=58618.24)dtime.phasefloatVmag[13.89/17.63]? Swift/UVOT V band magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag[0.036/0.21]? Uncertainty in Vmagmagstat.error;phot.magfloatnullableBmag[13.91/17.6]? Swift/UVOT B band magnitudemagphot.mag;em.opt.Bfloatnullablee_Bmag[0.026/0.07]? Uncertainty in Bmagmagstat.error;phot.magfloatnullableUmag[13.91/17.84]? Swift/UVOT U band magnitudemagphot.mag;em.opt.Ufloatnullablee_Umag[0.037/0.08]? Uncertainty in Umagmagstat.error;phot.magfloatnullableuvw1mag[15.63/20.8]? Swift/UVOT uvw1 band magnitudemagphot.mag;em.UVfloatnullablee_uvw1mag[0.03/0.5]? Uncertainty in uvw1magmagstat.error;phot.magfloatnullableuvw2mag[16.74/20.67]? Swift/UVOT uvw2 band magnitudemagphot.mag;em.UVfloatnullablee_uvw2mag[0.03/0.5]? Uncertainty in uvw2magmagstat.error;phot.magfloatnullableJ/ApJ/893/143/table5Log of the spectroscopic observations of SN 2019einrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObs[2019] Observation Date, Yeartime.epoch;obsMJD[58606.7/58659.6] Modified Julian Date (JD-2400000.5)dtime.epochfloatPhase[-11.5/41.4] Phase relative to the epoch of B-band maximum (MJD=58618.24)dtime.phasefloatwmin[4000/4500] Spectral coverage, minimum, Angstroms0.1nminstr.bandwidth;stat.minintwmax[8900/9200] Spectral coverage, maximum, Angstroms0.1nminstr.bandwidth;stat.maxintRes[400/500] Spectral resolution, lambda/delta(lambda)spect.resolutionintTelTelescope (G1)meta.id;instr.telcharInstInstrument (G2)meta.id;instrchar