J/ApJ/919/49ivo://CDS.VizieR/J/ApJ/919/49doi:10.26093/cds/vizier.19190049CDSZeng X.Wang X.Esamdin A.Pellegrino C.Burke J.Stahl B.E.Zheng W.,Filippenko A.V.Howell D.A.Sand D.J.Valenti S.Mo J.Xi G.Liu J.,Zhang J.Li W.Iskandar A.Zhang M.Lin H.Sai H.Xiang D.Wei P.,Zhang T.Reichart D.E.Brink T.G.McCully C.Hiramatsu D.,Hosseinzadeh G.Jeffers B.T.Ross T.W.Stegman S.Wang L.Zhang J.,Ma S.2023-10-03T13:26:40Z2023-02-28T08:32:06ZCDS support team

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

cds-question@unistra.frsupernovaeinfrared-photometryvisible-astronomyWide-band photometryspectroscopyWe present extensive optical photometric and spectroscopic observations of the high-velocity (HV) Type Ia supernova (SN Ia) 2017fgc, covering the phase from ~12 days before to ~389 days after maximum brightness. SN 2017fgc is similar to normal SNe Ia, with an absolute peak magnitude of M_max_^B^~-19.32+/-0.13mag and a post-peak decline of {Delta}m_15_(B)=1.05+/-0.07mag. Its peak bolometric luminosity is derived as (1.32+/-0.13)x10^43^erg/s, corresponding to a 56Ni mass of 0.51+/-0.03M_{sun}_. The light curves of SN 2017fgc are found to exhibit excess emission in the UBV bands in the early nebular phase and pronounced secondary shoulder/maximum features in the RrIi bands. Its spectral evolution is similar to that of HV SNe Ia, with a maximum-light SiII velocity of 15000+/-150km/s and a post-peak velocity gradient of ~120+/-10km/s/day. The FeII and MgII lines blended near 4300{AA} and the FeII, SiII, and FeIII lines blended near 4800{AA} are obviously stronger than those of normal SNe Ia. Inspecting a large sample reveals that the strength of the two blends in the spectra, and the secondary peak in the i/r-band light curves, are found to be positively correlated with the maximum-light SiII velocity. Such correlations indicate that HV SNe Ia may experience more complete burning in the ejecta and/or that their progenitors have higher metallicity. Examining the birthplace environment of SN 2017fgc suggests that it likely arose from a stellar environment with young and high-metallicity populations.2021ApJ...919...49Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/919/49CatalogResearchIsServedByTAP VizieR generic servicerelated-toII/183 : UBVRI Photometric Standards (Landolt 1992)V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)J/ApJ/645/488 : SN type Ia luminosities (Wang+, 2006)J/MNRAS/377/1531 : Optical & IR photometry of SN 2004eo (Pastorello+, 2007)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/PASP/122/1 : BVRI light curves of SN 2007gi (Zhang+, 2010)J/MNRAS/413/813 : ATLAS3D project. I. (Cappellari+, 2011)J/MNRAS/412/1441 : SNe luminosity functions (Li+, 2011)J/AJ/142/156 : The CSP (DR2): photometry of SNe Ia (Stritzinger+, 2011)J/MNRAS/410/1262 : Supernova Legacy Survey. Type Ia SNe (Walker+, 2011)J/AJ/143/126 : Spectroscopy of 462 nearby Type Ia SNe (Blondin+, 2012)J/ApJS/200/12 : CfA4: light curves for 94 type Ia SNe (Hicken+, 2012)J/MNRAS/425/1819 : Berkeley supernova Ia program. II. (Silverman+, 2012)J/ApJ/773/53 : Type Ia SNe spectroscopy by the CSP (Folatelli+, 2013)J/other/NewA/20.30 : BVRI light curves of 3 SN (Munari+, 2013)J/AJ/146/86 : Cosmicflows-2 catalog (Tully+, 2013)J/other/Sci/340.170 : Classifications of 188 SNe Ia (Wang+, 2013)J/A+A/568/A22 : Joint analysis of SDSS-II & SNLS SNe Ia (Betoule+, 2014)J/MNRAS/448/2766 : Strong lines in the opt/NIR for SN2002bo (Blondin+, 2015)J/MNRAS/446/120 : ATLAS3D project. XXIX (Duc+, 2015)J/ApJS/220/20 : Si and Ca high-velocity features in SNe Ia (Zhao+, 2015)J/MNRAS/459/3939 : Type II supernova light curves (Valenti+, 2016)J/ApJ/835/123 : Globular clusters in NGC 474 from CFHT obs. (Lim+, 2017)J/ApJ/869/56 : Updated calibration of CSP-I SNe Ia sample (Burns+, 2018)J/ApJ/859/101 : The supernovae Ia Pantheon sample (Scolnic+, 2018)J/ApJ/853/62 : Opt. & NIR spectra & LCs of SN2016ija (Tartaglia+, 2018)J/ApJ/882/120 : CfA, CSP, BSP & LOSS sp. & phot. of SNe Ia (Wang+, 2019)J/ApJ/893/143 : UBVRIJHK & sp. obs. of SN 2019ein (Kawabata+, 2020)J/ApJ/909/176 : SN2017hpa carbon-rich type Ia LCs and sp. (Zeng+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/919/49https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/919/49http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/919/49https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/919/49https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/919/49http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/919/49GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap1.9821045660507152e-19 6.118840631666147e-19OpticalInfrareddefaultJ/ApJ/919/49/table2Photometric observations of SN2017fgc by ground-based telescopese_imag[0.02/0.2]? Uncertainty in imagmagstat.error;phot.magfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJD[57947.1/58164.2] Modified Julian Date of obs (JD-2400000.5)dtime.epochdoubleEpoch[-12.3/204.72] Days relative to MJD=57959.4dtime.epochfloatUmag[13.52/18.92]? Johnson U band AB magnitudemagphot.mag;em.opt.Ufloatnullablee_Umag[0.04/0.8]? Uncertainty in Umagmagstat.error;phot.magfloatnullableBmag[13.79/18.66]? Johnson B band AB magnitudemagphot.mag;em.opt.Bfloatnullablee_Bmag[0.019/1]? Uncertainty in Bmagmagstat.error;phot.magfloatnullableVmag[13.5/18.66]? Johnson V band AB magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag[0.017/0.2]? Uncertainty in Vmagmagstat.error;phot.magfloatnullableRmag[13.52/19.69]? Johnson R band AB magnitudemagphot.mag;em.opt.Rfloatnullablee_Rmag[0.02/0.5]? Uncertainty in Rmagmagstat.error;phot.magfloatnullableImag[13.88/19.35]? Johnson I band AB magnitudemagphot.mag;em.opt.Ifloatnullablee_Imag[0.029/0.4]? Uncertainty in Imagmagstat.error;phot.magfloatnullablegmag[13.68/18.01]? Sloan g band AB magnitudemagphot.mag;em.opt.Bfloatnullablee_gmag[0.015/0.12]? Uncertainty in gmagmagstat.error;phot.magfloatnullablermag[13.54/19.2]? Sloan r band AB magnitudemagphot.mag;em.opt.Rfloatnullablee_rmag[0.015/0.2]? Uncertainty in rmagmagstat.error;phot.magfloatnullableimag[14.31/19.21]? Sloan i band AB magnitudemagphot.mag;em.opt.IfloatnullableCmag[13.58/18.81]? Clear-band AB magnitude; calibrated to standard Landolt R-bandmagphot.mag;em.opt.Rfloatnullablee_Cmag[0.025/0.7]? Uncertainty in Cmagmagstat.error;phot.magfloatnullableTelTelescope used (1)instr.setupcharJ/ApJ/919/49/table3Spectroscopic observations of SN 2017fgcrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJD[57947.7/58348.3] Modified Julian Datedtime.epochdoubleEpoch[-11.7/388.9] Days relative to the epoch of B-band maximum brightness, MJD=57959.4dtime.epochfloatlam1[2990/5711] Lower range of wavelength in {AA}0.1nmem.wl;stat.minintlam2[6963/24790] Upper range of wavelength in {AA}0.1nmem.wl;stat.maxintTelTelescope (1)meta.id;instr.telcharFileNameName of the ASCII file in subdirectory "sp"; column added by CDSmeta.id;meta.filecharSpInteractive spectrum plotmeta.ref.urlcharJ/ApJ/919/49/table4DLT40 photometry of SN2017fgc in the clear bandrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJD[57942.3/58124.5] Modified Julian Date of obs (JD-2400000.5)dtime.epochfloatEpoch[-17.1/165.1] Days relative to MJD=57959.4dtime.epochfloatCmag[13.65/19.2]? Clear-band AB magnitude; calibrated to R-bandmagphot.mag;em.opt.Rfloatnullablee_Cmag[0.016/0.09]? Uncertainty in Cmagmagstat.error;phot.magfloatnullableTelDistance Less Than 40 Telescope (DLT40; Tartaglia+ 2018, J/ApJ/853/62) telescope used ("Prompt5" or "Meckering")pos.distance;instr.telchar