J/MNRAS/492/4325ivo://CDS.VizieR/J/MNRAS/492/4325doi:10.26093/cds/vizier.74924325CDSStahl B.E.Zheng W.de Jaeger T.Brink T.G.Filippenko A.V.,Silverman J.M.Cenko S.B.Clubb K.I.Graham M.L.Halevi G.Kelly P.L.,Kleiser I.Shivvers I.Yuk H.Cobb B.E.Fox O.D.Kandrashoff M.T.,Kong J.J.Mauerhan J.C.Wang X.Wang X.2024-08-20T20:15:46Z2023-06-14T15:33:10ZCDS support team

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

cds-question@unistra.frsupernovaeredshiftedvisible-astronomyspectroscopyWe present 637 low-redshift optical spectra collected by the Berkeley Supernova Ia Program (BSNIP) between 2009 and 2018, almost entirely with the Kast double spectrograph on the Shane 3 m telescope at Lick Observatory. We describe our automated spectral classification scheme and arrive at a final set of 626 spectra (of 242 objects) that are unambiguously classified as belonging to Type Ia supernovae (SNe Ia). Of these, 70 spectra of 30 objects are classified as spectroscopically peculiar (i.e. not matching the spectral signatures of 'normal' SNe Ia) and 79 SNe Ia (covered by 328 spectra) have complementary photometric coverage. The median SN in our final set has one epoch of spectroscopy, has a redshift of 0.0208 (with a low of 0.0007 and high of 0.1921), and is first observed spectroscopically 1.1d after maximum light. The constituent spectra are of high quality, with a median signal-to-noise ratio of 31.8pixel^-1^, and have broad wavelength coverage, with ~95 per cent covering at least 3700-9800{AA}. We analyse our data set, focusing on quantitative measurements (e.g. velocities, pseudo-equivalent widths) of the evolution of prominent spectral features in the available early-time and late-time spectra. The data are available to the community, and we encourage future studies to incorporate our spectra in their analyses.2020MNRAS.492.4325Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/492/4325CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/492/4325https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/492/4325http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/492/4325https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/492/4325https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/492/4325http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/492/4325GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/492/4325/tablea1 (SN Ia information)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/492/4325/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/492/4325/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/492/4325/tablea1?GETtext/xml+votable180.050000true51.795446.94430.0055555555555555566/24 32 51 165 524 1071 1159 1256 1566 1594 1688 1700 1705 1725 2138 2258 2324 2335 2414 2499 2590 3108 3516 3937 4114 4328 4521 4652 4813 4966 4999 5004 5075 5087 5192 5610 5745 5815 5975 6076 6377 6765 6968 7198 7233 7266 7503 7523 7606 7975 8196 8203 8242 8352 8369 8418 8438 8456 8482 8509 8667 8705 8719 8787 9132 9311 9443 9468 9471 9495 9578 9591 9619 9632 9695 9812 9833 9881 9975 9992 10170 10207 10312 10379 10450 10535 10643 10696 10793 10816 10833 10925 11086 11144 11186 11263 11287 11434 11539 11802 11939 12027 12471 12497 12615 13316 13529 13545 13550 13581 13907 13925 14018 14910 14994 15197 15847 16194 16854 16871 17146 17360 17462 17741 17767 17784 17817 17899 18011 18103 18126 18148 18209 18212 18214 18295 18554 18739 18858 18978 19091 19187 19315 19355 19523 19619 19686 19899 19994 20021 20031 20122 20187 20364 20371 20922 21584 21833 21917 22650 22704 23027 23077 23092 23117 23211 23349 23820 23935 24152 24733 24943 25044 25229 25491 25577 25770 25888 26007 26041 26104 26303-26304 26309 26385 26548 26563 26584 26916 26978 27008 27024 27177 27564 27575 27738 27803 27806 27888 27974 28036 28230 28255 28294 28515 28619 28653 30103 30135 30160 31433 31551 31560 31881 32333 32338 32418 32431 32447 32456 32475 32504 32681 34531 34534 35918 36201 36287 36391 36632 38621 40825 43991 44660 44863 44896 48302 48319 48487 48580 48625 48740 48908 49022https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/492/4325?format=asciiOpticaldefaultJ/MNRAS/492/4325/tablea1SN Ia informationSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSupernova namemeta.id;meta.maincharDiscovDiscovery date (UT)time.epochRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainz? Heliocentric redshift mostly from NEDsrc.redshiftfloatnullabler_zReference for z (1)meta.ref;pos.framecharE(B-V)Extinction calculated at the supernova position (2)magphot.color.excessfloatSubtypeSupernova subtype (3)src.classcharNspNumber of spectrameta.numberintfepoch? First observation epoch (4)dtime.epoch;obsfloatnullablelepoch? Last observation epoch (4)dtime.epoch;obsfloatnullableRef? Reference for the light-curve-determined MJD corresponding to B-band maximum brightness (5)meta.ref;pos.frameintnullableJ/MNRAS/492/4325/tables1SN Ia spectral informationRef? References (2)meta.refintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSupernova namemeta.id;meta.maincharUTDateUT date for the temporal midpoint of the associated observationtime.epochtLC? Phase in rest-frame days as computed from the appropriate redshift and photometry from Table A1dtime.phasefloatnullableInst[1/2] Instrument used for observation (1)meta.id;instrintlambdaminWavelength range (minimum value)0.1nminstr.bandwidthintlambdamaxWavelenght range (maximum value)0.1nminstr.bandwidthintResb? Spectral resolution for the blue component0.1nmspect.resolutionfloatnullableResr? Spectral resolution for the red component0.1nmspect.resolutionfloatnullablePA[]? Observed slit position angledegpos.posAngfloatnullableAirmass? Airmass for the temporal midpoint of the associated observationobs.airMassfloatnullableExpTime? Exposure timestime.duration;obs.exposureintnullableS/NSignal to noise ratiostat.snrfloatJ/MNRAS/492/4325/tables2SNID classification resultsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSupernova namemeta.id;meta.maincharTypeSupernova typesrc.classcharSubtypeSupernova subtypesrc.classcharzSNID? SNID redshiftsrc.redshift;pos.heliocentricfloatnullablee_zSNID? Error on zSNIDstat.errorfloatnullabletSNID? SNID spectral age in rest-frame days relative to the time of the associated SN's maximum brightnessdtime.agefloatnullablee_tSNID? Error on tSNIDdstat.errorfloatnullableSNameName of the best-matching SNID templatemeta.id;stat.fitcharSSubtypeSubtype of the best-matching SNID templatesrc.classcharrlapMeasure of quality used by SNID (1)stat.fit.goodnessfloatzRedshift of the best-matching SNID templatesrc.redshiftfloattSpectral age of the best-matching SNID templatedtime.agefloatJ/MNRAS/492/4325/table3Spectral featuresrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFeatureSpectral featuremeta.id;spect.linecharrestwvl? Rest wavelength0.1nmem.wlfloatnullablef_restwvl[a] Flag on restwvl (1)meta.codecharbboundaryBlue boundary of the absorption feature0.1nmem.wlcharrboundaryRed boundary of the absorption feature0.1nmem.wlcharJ/MNRAS/492/4325/tables4SN Ia spectral feature measurements near maximum brightnessrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSupernova namemeta.id;meta.maincharFeatureSpectral featuremeta.id;spect.linechartLCPhases in rest-frame daysdtime.phasefloatFbFlux within the blue edge boundary0.01W.m**-2.nm**-1phot.fluxfloate_FbError on Fb0.01W.m**-2.nm**-1stat.errorfloatpEWPseudo-equivalent width0.1nmspect.line.widthfloatFrFlux within the red edge boundary0.01W.m**-2.nm**-1phot.fluxfloate_FrError on Fr0.01W.m**-2.nm**-1stat.errorfloate_pEWError on pEW0.1nmstat.errorfloatv? Expansion velocity (blueshift)1000km.s**-1phys.veloc.expansionfloatnullablee_v? Error on v1000km.s**-1stat.errorfloatnullable