J/ApJ/797/24ivo://CDS.VizieR/J/ApJ/797/24doi:10.26093/cds/vizier.17970024CDSVreeswijk P.M.Savaglio S.Gal-Yam A.De Cia A.Quimby R.M.,Sullivan M.Cenko S.B.Perley D.A.Filippenko A.V.Clubb K.I.,Taddia F.Sollerman J.Leloudas G.Arcavi I.Rubin A.Kasliwal M.M.,Cao Y.Yaron O.Tal D.Ofek E.O.Capone J.Kutyrev A.S.Toy V.,Nugent P.E.Laher R.Surace J.Kulkarni S.R.2017-09-11T08:57:21Z2017-08-23T06:24:06ZCDS support team

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

cds-question@unistra.frsupernovaevisible-astronomysloan-photometryinfrared-photometrybroad-band-photometryWe present imaging and spectroscopy of a hydrogen-poor superluminous supernova (SLSN) discovered by the intermediate Palomar Transient Factory, iPTF 13ajg. At a redshift of z=0.7403, derived from narrow absorption lines, iPTF 13ajg peaked at an absolute magnitude of M_u,AB_=-22.5, one of the most luminous supernovae to date. The observed bolometric peak luminosity of iPTF 13ajg is 3.2x10^44^ erg/s, while the estimated total radiated energy is 1.3x10^51^ erg. We detect narrow absorption lines of Mg I, Mg II, and Fe II, associated with the cold interstellar medium in the host galaxy, at two different epochs with X-shooter at the Very Large Telescope. From Voigt profile fitting, we derive the column densities log N(Mg I)=11.94+/-0.06, log N(Mg II)=14.7+/-0.3, and log N(Fe II)=14.25+/-0.10. These column densities, as well as the Mg I and Mg II equivalent widths of a sample of hydrogen-poor SLSNe taken from the literature, are at the low end of those derived for gamma-ray bursts (GRBs) whose progenitors are also thought to be massive stars. This suggests that the environments of hydrogen-poor SLSNe and GRBs are different. From the nondetection of Fe II fine-structure absorption lines, we derive a lower limit on the distance between the supernova and the narrow-line absorbing gas of 50 pc. The neutral gas responsible for the absorption in iPTF 13ajg exhibits a single narrow component with a low velocity width, {Delta}V=76 km/s, indicating a low-mass host galaxy. No host galaxy emission lines are detected, leading to an upper limit on the unobscured star formation rate (SFR) of SFR_[OII]_<0.07 M_{sun}_/yr. Late-time imaging shows the iPTF 13ajg host galaxy to be faint, with g_AB_~27.0 and R_AB_>=26.0 mag, corresponding to M_B,Vega_>~-17.7 mag.2014ApJ...797...24Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/797/24CatalogResearchIsServedByTAP VizieR generic servicerelated-toII/294 : The SDSS Photometric Catalog, Release 7II/313 : Palomar Transient Factory (PTF) photometric catalog 1.0J/MNRAS/448/1206 : Superluminous supernovae in faint galaxies (McCrum+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/797/24https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/797/24http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/797/24https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/797/24https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/797/24http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/797/24GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/ApJ/797/24/table1Log of imaging observations of iPTF 13ajgrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian Datedtime.epochdoubleTimeObserved time relative to R band peak (1)dtime.epochfloatPhasePhasedtime.phasefloatTelTelescope identifier (2)meta.id;instr.telcharExpExposure timemintime.duration;obs.exposurecharFilterFilter used (ugriz, B, R, R_s_, J or K_s_)meta.id;instr.filtercharSeeingSeeingarcsecinstr.obsty.seeingfloatl_mag[>] Limit flag on magmeta.code.errorcharmagMagnitude in Filter (3)magphot.magfloate_mag? Uncertainty in magmagstat.error;phot.magfloatnullable