J/ApJ/924/55ivo://CDS.VizieR/J/ApJ/924/55doi:10.26093/cds/vizier.19240055CDSGagliano A.Izzo L.Kilpatrick C.D.Mockler B.Jacobson-Galan W.V.,Terreran G.Dimitriadis G.Zenati Y.Auchettl K.Drout M.R.,Narayan G.Foley R.J.Margutti R.Rest A.Jones D.O.Aganze C.,Aleo P.D.Burgasser A.J.Coulter D.A.Gerasimov R.Gall C.Hjorth J.,Hsu C.-C.Magnier E.A.Mandel K.S.Piro A.L.Rojas-Bravo C.,Siebert M.R.Stacey H.Stroh M.C.Swift J.J.Taggart K.Tinyanont S.,Young Supernova Experiment2023-11-03T13:19:41Z2023-08-17T08:36:11ZCDS support team

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

cds-question@unistra.frsupernovaevisible-astronomyspectroscopyultraviolet-photometryWe present photometric and spectroscopic observations of Supernova 2020oi (SN 2020oi), a nearby (~17Mpc) type-Ic supernova (SNIc) within the grand-design spiral M100. We undertake a comprehensive analysis to characterize the evolution of SN 2020oi and constrain its progenitor system. We detect flux in excess of the fireball rise model {delta}t~2.5d from the date of explosion in multiband optical and UV photometry from the Las Cumbres Observatory and the Neil Gehrels Swift Observatory, respectively. The derived SN bolometric luminosity is consistent with an explosion with M_ej_=0.81+/-0.03M_{sun}_, E_k_=0.79+/_0.09x10^51^erg/s, and M_Ni56_=0.08+/-0.02M_{sun}_. Inspection of the event's decline reveals the highest {Delta}m_15,bol_ reported for a stripped-envelope event to date. Modeling of optical spectra near event peak indicates a partially mixed ejecta comparable in composition to the ejecta observed in SN1994I, while the earliest spectrum shows signatures of a possible interaction with material of a distinct composition surrounding the SN progenitor. Further, Hubble Space Telescope pre-explosion imaging reveals a stellar cluster coincident with the event. From the cluster photometry, we derive the mass and age of the SN progenitor using stellar evolution models implemented in the BPASS library. Our results indicate that SN 2020oi occurred in a binary system from a progenitor of mass M_ZAMS_~9.5+/-1.0M_{sun}_, corresponding to an age of 27+/-7Myr. SN2020oi is the dimmest SN Ic event to date for which an early-time flux excess has been observed, and the first in which an early excess is unlikely to be associated with shock cooling.2022ApJ...924...55Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/924/55CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/swift : Swift Master Catalog (HEASARC, 2004-)B/hst : HST Archived Exposures Catalog (STScI, 2007)B/chandra : The Chandra Archive Log (CXC, 1999-2014)VIII/76 : Leiden/Argentine/Bonn (LAB) Survey of Galactic HI (Kalberla+ 2005)II/349 : The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers+, 2016)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)J/AJ/133/791 : Spitzer phot. of normal & interacting gal. (Smith+, 2007)J/ApJ/676/184 : Peculiar motion away from the Local Void (Tully+, 2008)J/MNRAS/383/1485 : BVRI light curves of SN 2003jd (Valenti+, 2008)J/AJ/137/4517 : UVOT light curves of supernovae (Brown+, 2009)J/ApJ/702/226 : Swift/UVOT panchromatic obs. of SN 2008D (Modjaz+, 2009)J/other/Nat/463.513 : Radio observations of SN 2009bb (Soderberg+, 2010)J/ApJ/741/97 : Light curves of Ibc supernovae (Drout+, 2011)J/MNRAS/412/1441 : SNe luminosity functions (Li+, 2011)J/ApJ/728/14 : Photometry of SN 2009bb (Pignata+, 2011)J/MNRAS/425/1789 : Berkeley supernova Ia program. I. (Silverman+, 2012)J/ApJ/750/99 : The Pan-STARRS1 photometric system (Tonry+, 2012)J/A+A/559/A114 : Updated O3N2 and N2 abundance indicators (Marino+, 2013)J/ApJ/821/57 : Photometry of the Type Ib/c SN2013ge (Drout+, 2016)J/ApJ/825/L22 : BVRI LCs of type Ib supernova iPTF13bvn (Folatelli+, 2016)J/AJ/152/50 : Cosmicflows-3 catalog (CF3) (Tully+, 2016)J/other/Sci/362.201 : iPTF 14gqr (SN 2014ft) photometry (De+, 2018)J/ApJ/855/107 : PMAS Integral-field SN hosts COmpilation (Galbany+, 2018)J/ApJ/860/39 : HST obs. of nearby core-collapse SNe (Williams+, 2018)J/ApJ/870/L1 : K2 obs. of type Ia supernova SN 2018oh (Dimitriadis+, 2019)J/A+A/629/A57 : Supernova ASASSN-14jb light curves and spectra (Meza+, 2019)J/ApJ/903/132 : Radio & optical obs. of supernova SN2020oi (Horesh+, 2020)J/ApJ/898/166 : UV to NIR obs. of SN 2019ehk (Jacobson-Galan+, 2020)J/A+A/637/A6 : Stripped-envelope stars Binary Models (Laplace+, 2020)J/ApJ/908/232 : SN 2020bvc optical and near-IR spectra (Rho+, 2021)http://hla.stsci.edu/ : Hubble Legacy Archive home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/924/55https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/924/55http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/924/55https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/924/55https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/924/55http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/924/55GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapUVOpticaldefaultJ/ApJ/924/55/table1HST pre-explosion cluster and SN 2020oi photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateDate of observation (UT)time.epochnullableMJD[49352.6/59267] Modified Julian Datedtime.epochfloatf_MJD[p] p=photometry obtained pre-explosionmeta.codecharPhase[-9501.4/413] Phase relative to time of explosion (MJD=58854.0)time.phasefloatInstInstrumentmeta.id;instrcharFiltFiltermeta.id;instr.filtercharExp[270/2400] Exposure timestime.duration;obs.exposurefloatmag[15.8/20.14] Apparent AB magnitude; not corrected for host extinctionmagphot.magfloate_mag[0.004/0.2] Uncertainty on the magmagstat.error;phot.magfloatLimit[22.8/27.1] 3{sigma} limitphot.mag;stat.maxfloatPropID[5195/16179] Proposal IDmeta.id;obs.proposalintPIPIobs.observercharJ/ApJ/924/55/table2Optical and UV photometry of SN 2020oirecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJD[58543.3/59275.4] Modified Julian Datedtime.epochdoublePhase[-310.7/421.4] Phase relative to time of explosion (MJD=58854.0)dtime.phasefloatBandObservational bandpass (UBV,G,ugriz, UVM2,UVW1 or UVW2)instr.bandpasscharl_magLimit flag on magmeta.code.errorcharmag[12.57/20.5] Apparent magnitude in Bandmagphot.magfloate_mag[0.03/0.9]? Uncertainty in magmagstat.error;phot.magfloatnullableTelTelescope code (1)meta.code;instr.telcharJ/ApJ/924/55/table3Optical spectroscopic observations of SN 2020oirecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateDate of observation (UT)time.epochnullableMJD[58857.3/58895] Modified Julian Date (as in Figure 3)dtime.epochdoublePhase[3.3/41] Phase relative to time of explosion (MJD=58854.0)dtime.phasefloatTelTelescopemeta.id;instr.telcharInstInstrument (FLOYDS, LRIS, KAST or Goodman)meta.id;instrcharlam1Lower range of wavelength in {AA}0.1nmem.wl;stat.minintlam2Upper range of wavelength in {AA}0.1nmem.wl;stat.maxintspInteractive Spectrum Plotmeta.ref.urlcharJ/ApJ/924/55/fig3The full sequence of optical spectra obtained for SN 2020oirecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJD[58857.3/58895] Modified Julian Datedtime.epochdoubleindexedInstInstrument (1)meta.id;instrcharlambda[3163.18/10200.7] Wavelength; Angstroms0.1nmem.wldoubleFlux[-0.96/1.8e-14] Flux in erg/s/cm^2^/{AA} units; no color correction appliedcW.m**-2.nm**-1meta.unit;phot.fluxdouble