J/ApJ/841/48ivo://CDS.VizieR/J/ApJ/841/48doi:10.26093/cds/vizier.18410048CDSShappee B.J.Stanek K.Z.Kochanek C.S.Garnavich P.M.2018-05-14T09:47:13Z2018-02-19T09:43:44ZCDS support team

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

cds-question@unistra.frsupernovaeinfrared-photometryvisible-astronomyWide-band photometryUsing the Hubble Space Telescope (HST) and the Large Binocular Telescope, we followed the evolution of the Type Ia supernova (SN Ia) 2011fe for an unprecedented 1840 days past B-band maximum light and over a factor of 7 million in flux. At 1840 days, the 4000-17000{AA} quasi-bolometric luminosity is just (420+/-20)L_{sun}_. By measuring the late-time quasi-bolometric light curve, we present the first confident detection of ^57^Co decay in a SN Ia light curve and estimate a mass ratio of log(^57^Co/^56^Co)=-1.59_-0.07_^+0.06^. We do not have a clean detection of ^55^Fe, but find a limit of ^55^Fe/^57^Co<0.22 with 99% confidence. These abundance ratios provide unique constraints on the progenitor system because the central density of the exploding white dwarf(s) dictates these nucleosynthetic yields. The observed ratios strongly prefer the lower central densities of double-degenerate models (^55^Fe/^57^Co=0.27) over the higher central densities of near-Chandrasekhar-mass single-degenerate models (^55^Fe/^57^Co=0.68). However, additional theoretical studies predicting isotopic yields from a broader range of progenitor systems are motivated by these unique observations. We will continue to observe SN 2011fe for another ~600 days with HST and possibly beyond.2017ApJ...841...48Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/841/48CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)J/ApJ/743/176 : BVI photometry of Cepheids in M81 (Gerke+, 2011)J/ApJ/733/124 : Cepheids in M101 observed with HST (Shappee+, 2011)J/ApJ/749/18 : Swift/UVOT observations of 12 nearby SN-Ia (Brown+, 2012)J/ApJ/753/22 : Swift/UVOT observations of SN 2011fe (Brown+, 2012)J/MNRAS/426/2668 : Soft X-ray emission of SNIa progenitors (Nielsen+, 2012)J/other/NewA/20.30 : BVRI light curves of 3 SN (Munari+, 2013)J/A+A/554/A27 : 2011fe spectrophotometric time series (Pereira+, 2013)J/MNRAS/444/3258 : Velocities and EW of PTF SNe Ia (Maguire+, 2014)J/MNRAS/445/2440 : SN with associated Planck CMB temperatures (Yershov+, 2014)J/ApJ/788/48 : X-ray through NIR photometry of NGC 2617 (Shappee+, 2014)J/ApJ/795/142 : Photometric peculiar SNe Ia (Gonzalez-Gaitan+, 2014)J/ApJS/215/9 : PHAT X. UV-IR photometry of M31 stars (Williams+, 2014)J/ApJS/220/9 : CfAIR2: NIR light curves of Type Ia SNe (Friedman+, 2015)J/ApJS/220/20 : Si and Ca high-velocity features in SNe Ia (Zhao+, 2015)J/MNRAS/446/3895 : The rising light curves of Type Ia supernovae (Firth+, 2015)J/MNRAS/448/1345 : YJK for Type Ia supernovae (Dhawan+, 2015)J/MNRAS/451/1973 : Type Ia supernovae high-velocity features (Silverman+, 2015)J/MNRAS/456/2848 : Properties of 500 SNe and their 419 hosts (Hakobyan+, 2016)J/ApJ/826/144 : Follow-up observations of SNIa ASASSN-14lp (Shappee+, 2016)J/ApJ/836/232 : Swift-UVOT obs. analysis of 29 SNe Ia (Brown+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/841/48https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/841/48http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/841/48https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/841/48https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/841/48http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/841/48GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/ApJ/841/48/table1Photometric observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDObservation date; Julian Datedtime.epochdoubleFiltFilter (U_spec,B,V,R,J,F110W,F160W,F438W,F555W, F600LP or "bol")meta.notecharFbol[1.6/13.8]? Bolometric flux (in 10^+36^erg/s units)1e+29Wphot.flux.bolfloatnullablee_Fbol[0.09/0.3]? Uncertainty in Fbol1e+29Wstat.errorfloatnullableomag[16.3/27.5]? Observed Vega magnitude in Filtmagphot.magfloatnullablee_omag[0.01/0.9]? Uncertainty in omagmagstat.error;phot.magfloatnullableTelTelescope/Instrument usedmeta.id;instr.telchar