J/ApJ/938/83ivo://CDS.VizieR/J/ApJ/938/83doi:10.26093/cds/vizier.19380083CDSYang J.Wang L.Suntzeff N.Hu L.Aldoroty L.Brown P.J.,Krisciunas K.Arcavi I.Burke J.Galbany L.Hiramatsu D.,Hosseinzadeh G.Howell D.A.McCully C.Pellegrino C.Valenti S.2025-02-12T20:09:25Z2024-10-11T14:19:40ZCDS support team

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

cds-question@unistra.frsupernovaephotometryvisible-astronomyredshiftedWe present the photometry of 16 91T/99aa-like Type Ia Supernovae (SNeIa) observed by the Las Cumbres Observatory. We also use an additional set of 21 91T/99aa-like SNe Ia and 87 normal SNe Ia from the literature for an analysis of the standardizability of the luminosity of 91T/99aa-like SNe. We find that 91T/99aa-like SNe are 0.2mag brighter than normal SNe Ia, even when fully corrected by the light-curve shapes and colors. The weighted rms of the 91T/99aa-like SNe (with z_CMB_>0.01) Hubble residuals is 0.25+/-0.03mag, suggesting that 91T/99aa-like SNe are also excellent relative distance indicators to +/-12%. We compare the Hubble residuals with the pseudo-equivalent width (pEW) of SiII{lambda}{lambda}6355 around the date of maximum brightness. We find that there is a broken linear correlation between those two measurements for our sample including both 91T/99aa-like and normal SNe Ia. As the pEW_max_(SiII{lambda}{lambda}6355) increases, the Hubble residual increases when pEW_max_(SiII{lambda}{lambda}6355)<55.6{AA}. However, the Hubble residual stays constant beyond this. Given that 91T/99aa-like SNe possess shallower SiII lines than normal SNe Ia, the linear correlation at pEW_max_(SiII{lambda}{lambda}6355)<55.6{AA} can account for the overall discrepancy of Hubble residuals derived from the two subgroups. Such a systematic effect needs to be taken into account when using SNe Ia to measure luminosity distances.2022ApJ...938...83Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/938/83CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/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/ApJ/699/L139 : Spectral parameters of SNe Ia (Wang+, 2009)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/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/740/92 : SN.Ia host galaxies properties (Gupta+, 2011)J/AJ/143/126 : Spectroscopy of nearby Type Ia supernovae (Blondin+, 2012)J/ApJS/200/12 : CfA4: light curves for 94 type Ia SNe (Hicken+, 2012)J/MNRAS/425/1789 : Berkeley supernova Ia program. I. (Silverman+, 2012)J/MNRAS/435/1680 : SN Ia host galaxy properties (Johansson+, 2013)J/A+A/568/A22 : Joint analysis of SDSS-II and SNLS SNe Ia (Betoule+, 2014)J/ApJ/813/30 : UV-Opt light curves of the SNIa iPTF14bdn (Smitka+, 2015)J/MNRAS/459/3939 : Type II supernova light curves (Valenti+, 2016)J/AJ/154/211 : The CSP (DR3): phot. of low-z SNe Ia (Krisciunas+, 2017)J/MNRAS/475/193 : Foundation Supernova Survey 1st data release (Foley+, 2018)J/ApJ/869/167 : Improved empirical models for Type Ia SNe (Saunders+, 2018)J/ApJ/876/85 : HST observations for LMC Cepheids (Riess+, 2019)J/MNRAS/499/1424 : Properties of 407 SNe and their 394 hosts (Hakobyan+, 2020)J/A+A/636/A46 : The SUGAR model. Training dataset (Leget+, 2020)J/ApJ/902/46 : LCO network light curves of SN Ia 2018gv (Yang+, 2020)J/ApJ/930/70 : A compilation of optical spectra from 361 SNe Ia (Hu+, 2022)http://www.wis-tns.org/ : Transient Name Server (TNS) homepagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/938/83https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/938/83http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/938/83https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/938/83https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/938/83http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/938/83GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/938/83/table1 (General properties of Las Cumbres 91T/99aa-like supernovae)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/938/83/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/938/83/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/938/83/table1?GETtext/xml+votable180.050000true247.44204178.64183330.005555555555555556Cone search capability for table J/ApJ/938/83/table2 (General properties of 91T/99aa-like SNe Ia in the literature)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/938/83/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/938/83/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/938/83/table2?GETtext/xml+votable180.050000true188.54252.66566670.005555555555555556Cone search capability for table J/ApJ/938/83/table8 (Parameters of normal SNe Ia in our sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/938/83/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/938/83/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/938/83/table8?GETtext/xml+votable180.050000true348.66795834.537250.0055555555555555566/626 928 1701 1796 2142 2227 2324 2340 2353 2379 2473 3393 4114 4577 4719 4813 5004 5115 5680 5975 6114 6178 6962 7523 7975 9136 9449 9468 9560 10004 10207 10379 10438 10767 10816 10858 11064 11263 11434 11496 12367 12455 13350 13459 13505 13529 13907 14018 15197 16852 17401 17614 17662 17840 18206 18214 18394 18735 18753 18895 19087 19227 19241 19283 20283 20358 20370 21584 21833 22765 22826 23013 23023 23077 23405 23820 25333 25513 25577 25889 25960 26262 26268 26336 26914 27348 27426 27470 27491 27738 27761 28249 28363 28368 28453 30044 31218 31230 31348 31463 31537 31551 31628 31661 31881 32482 32561 32569 32602 33681 36287 36615 36805 43575 44896 44915 48487 48665 48898https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/938/83?format=asciiOpticaldefaultJ/ApJ/938/83/table1General properties of Las Cumbres 91T/99aa-like supernovaerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSupernova namemeta.id;meta.maincharprimaryRAJ2000Hour of right ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000) (1)pos.eq.dec;meta.mainGalHost galaxy name (1)meta.id.parentcharzHelio[0.011/0.06] Host-galaxy heliocentric redshift from NED or TNS unless flaggedsrc.redshift;pos.heliocentricdoubler_zHelio[c] c: From Phillips+ 2019PASP..131a4001Pmeta.bib;src.redshift;pos.heliocentriccharDiscRefDiscovery referencemeta.refcharSpRefSpectroscopic referencemeta.refcharNnatNumber of natural system photometry measurements (link to Table 3)meta.numberintnullableNstdNumber of standard system photometry measurements (link to Table 4)meta.numberintnullableNurNumber of photometry measurements in UR bands (link to Table 5)meta.numberintnullableParamDisplay the parameters from Table 7meta.ref.urlintnullableTNSDisplay the TNS online data for this supernovameta.ref.urlcharLCnInteractive LC Plot (natural systems)meta.ref.urlcharLCsInteractive LC Plot (standard systems)meta.ref.urlcharLCurInteractive LC Plot (U and R bands)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharNEDask the NED database about the host galaxymeta.ref.urlcharJ/ApJ/938/83/table2General properties of 91T/99aa-like SNe Ia in the literaturerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintzHelioHeliocentric redshift from the NED unless indicated otherwisesrc.redshift;pos.heliocentricdoubler_zHelioReference for zHelio (1)meta.bib;src.redshift;pos.heliocentriccharSimbadSimbad column added by the CDSmeta.ref.urlcharPhotRefPhotometry reference(s) (1)meta.ref;photcharClRefClassification reference (1)meta.refcharParamDisplay the parameters from Table 7meta.ref.urlintnullableTNSDisplay the TNS online data for this supernovameta.ref.urlcharNEDask the NED database about the host galaxymeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainNameSupernova namemeta.id;meta.maincharGalHost galaxy namemeta.id.parentcharJ/ApJ/938/83/table7*Parameters of 91T/99aa-like SNe Ia in our sampleHRes[-2/0.5] Hubble residualmagstat.fit.residualfloattMaxB[48375.5/58830.9] Modified Julian Date of B band maximumdtime.epoch;stat.max;em.opt.Bdoublee_tMaxB[0.03/1.01] Uncertainty in tMaxBdstat.error;time.epoch;stat.maxfloatDelm15B[0.68/1.2] Decline in B band after 15 daysmagphot.mag;em.opt.B;arith.difffloate_Delm15B[0.01/0.4] Uncertainty in Delm15Bmagstat.error;phot.mag;arith.difffloatmaxB[11.6/17.77] B band magnitude at maximummagphot.mag;em.opt.B;stat.maxfloate_maxB[0/0.05] Uncertainty in maxBmagstat.error;phot.mag;stat.maxfloatPC1B[-1.9/1.96] First B band principle component parameterstat.paramfloate_PC1B[0.05/6.5] Uncertainty in PC1Bstat.error;stat.paramfloatPC2B[-1.1/0.24] Second B band principle component parameterstat.paramfloate_PC2B[0.03/3.8] Uncertainty in PC2Bstat.error;stat.paramfloattMaxV[48378.19/58832.31] Modified Julian Date of V band maximumdtime.epoch;stat.max;em.opt.Vdoublee_tMaxV[0.05/0.8] Uncertainty in tMaxVdstat.error;time.epoch;stat.maxfloatDelm15V[0.5/0.73] Decline in V band after 15 daysmagphot.mag;em.opt.V;arith.difffloate_Delm15V[0.01/0.08] Uncertainty in Delm15Vmagstat.error;phot.mag;arith.difffloatmaxV[11.41/17.51] V band magnitude at maximummagphot.mag;em.opt.V;stat.maxfloate_maxV[0/0.04] Uncertainty in maxVmagstat.error;phot.mag;stat.maxfloatPC2V[-0.32/0.5] Second V band principle component parameterstat.paramfloate_PC2V[0.02/0.9] Uncertainty in PC2Vstat.error;stat.paramfloate_HRes[0.29/0.5] Uncertainty in HResmagstat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLitFalse for SNe from Table 1; or True for SNe from literature (Table 2)meta.codecharf_Name[0/8]? Subtype flag on Name (G2)meta.codeintnullablezCMB[0.0069/0.06] CMB frame redshiftsrc.redshift;pos.cmbfloatpEW[4.5/80.4]? SiII 6355{AA} equivalent width near maximum; Angstroms0.1nmspect.line.eqWidth;stat.maxfloatnullableE(B-V)[0.01/0.5] Host galaxy B-V color excessmagphot.color.excessfloate_E(B-V)[0.01/0.06] Uncertainty in E(B-V)magstat.error;phot.color.excessfloatPC1V[-1.42/1.1] First V band principle component parameterstat.paramfloate_PC1V[0.04/1.7] Uncertainty in PC1Vstat.error;stat.paramfloatNameSupernova identifiermeta.id;meta.maincharJ/ApJ/938/83/table8Parameters of normal SNe Ia in our samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintf_Name? Subtype flag on Name (G2)meta.codecharzCMB[0.0014/0.062] CMB frame redshiftsrc.redshift;pos.cmbfloatpEW[28.6/136.6]? SiII 6355 equivalent width near maximum; Angstroms0.1nmspect.line.eqWidth;stat.maxfloatnullableE(B-V)[-0.05/1.3] Host galaxy B-V color excessmagphot.color.excessfloate_E(B-V)[0.01/0.11] Uncertainty in E (B-V)magstat.error;phot.color.excessfloatHRes[-0.73/1.16] Hubble residualmagstat.fit.residualfloate_HRes[0.1/0.8] Uncertainty in HResmagstat.errorfloattMaxB[51029.19/58149.54] Modified Julian Date of B band maximumdtime.epoch;stat.max;em.opt.Bdoublee_tMaxB[0.02/1.21] Uncertainty in tMaxBdstat.error;time.epoch;stat.maxfloatDelm15B[0.66/2.1] Decline in B band after 15 daysmagphot.mag;em.opt.B;arith.difffloate_Delm15B[0.01/0.32] Uncertainty in Delm15Bmagstat.error;phot.mag;arith.difffloatmaxB[9.89/18.11] B band magnitude at maximummagphot.mag;em.opt.B;stat.maxfloate_maxB[0/0.09] Uncertainty in maxBmagstat.error;phot.mag;stat.maxfloatPC1B[-2/5] First B band principle component parameterstat.paramfloate_PC1B[0/6.6] Uncertainty in PC1Bstat.error;stat.paramfloatPC2B[-2/1.9] Second B band principle component parameterstat.paramfloate_PC2B[0.02/4.8] Uncertainty in PC2Bstat.error;stat.paramfloattMaxV[51031.57/58151.59] Modified Julian Date of V band maximumdtime.epoch;stat.max;em.opt.Vdoublee_tMaxV[0.03/1] Uncertainty in tMaxVdstat.error;time.epoch;stat.maxfloatDelm15V[0.46/1.4] Decline in V band after 15 daysmagphot.mag;em.opt.V;arith.difffloate_Delm15V[0.01/0.22] Uncertainty in Delm15Vmagstat.error;phot.mag;arith.difffloatmaxV[9.9/17.91] V band magnitude at maximummagphot.mag;em.opt.V;stat.maxfloate_maxV[0/0.06] Uncertainty in maxVmagstat.error;phot.mag;stat.maxfloat_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainNameSupernova identifiermeta.id;meta.maincharPC1V[-2/5] First V band principle component parameterstat.paramfloate_PC1V[0/2.7] Uncertainty in PC1Vstat.error;stat.paramfloatPC2V[-0.97/0.61] Second V band principle component parameterstat.paramfloate_PC2V[0.02/1.2] Uncertainty in PC2Vstat.error;stat.paramfloatTNSDisplay the TNS online data for this supernovameta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlcharJ/ApJ/938/83/table3*Las Cumbres 91T/99aa-like SNe photometry in natural systemsInstSite, Telescope and Instrument information (G1)meta.id;instrcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFiltFilter used (B,V,g,r,i)meta.id;instr.filtercharMJD[56929.38/58931.75] Modified Julian Datedtime.epochdoublemag[14.38/22.22] Apparent magnitude in Filtermagphot.mag;em.optfloate_mag[0.015/0.8] Uncertainty in magmagstat.error;phot.mag;em.optfloatNameSupernova identifiermeta.id;meta.maincharJ/ApJ/938/83/table4Las Cumbres 91T/99aa-like SNe photometry in standard systems using S-corrections; See Section 2.2recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFiltFilter used (B,V,g,r,i)meta.id;instr.filtercharMJD[56929.38/58931.75] Modified Julian Datedtime.epochdoublemag[14.36/22.2] Apparent magnitude in Filtmagphot.mag;em.optfloate_mag[0.025/0.8] Uncertainty in magmagstat.error;phot.mag;em.optfloatNameSupernova identifiermeta.id;meta.maincharJ/ApJ/938/83/table5Las Cumbres 91T/99aa-like SNe photometry in UR bandsNameSupernova identifiermeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFiltFilter used (U,R)meta.id;instr.filtercharMJD[58287.36/58931.74] Modified Julian Datedtime.epochdoublemag[13.88/18.8] Apparent magnitude in Filtermagphot.mag;em.optfloate_mag[0.02/1.01] Uncertainty in magmagstat.error;phot.mag;em.optfloatInstSite, Telescope and Instrument information (G1)meta.id;instrchar