J/ApJ/813/30ivo://CDS.VizieR/J/ApJ/813/30doi:10.26093/cds/vizier.18130030CDSSmitka M.T.Brown P.J.Suntzeff N.B.Zhang J.Zhai Q.Wang X.Mo J.,Zhang T.2017-07-10T06:21:55Z2016-03-14T15:20:38ZCDS support team

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

cds-question@unistra.frsupernovaeinfrared-photometryvisible-astronomybroad-band-photometryultraviolet-photometryWe present ultraviolet (UV) and optical photometry and spectra of the 1999aa-like supernova (SN) iPTF14bdn. The UV data were observed using the Swift Ultraviolet/Optical Telescope (UVOT) and constitute the first UV spectral series of a 1999aa-like SN. From the photometry, we measure {Delta}m_15_(B)=0.84+/-0.05mag and blue UV colors at epochs earlier than -5 days. The spectra show that the early-time blue colors are the result of less absorption between 2800-3200{AA} than is present in normal SNe Ia. Using model spectra fits of the data at -10 and +10days, we identify the origin of this spectral feature to be a temperature effect in which doubly ionized iron group elements create an opacity "window". We determine that the detection of high temperatures and large quantities of iron group elements at early epochs imply the mixing of a high Ni mass into the outer layers of the SN ejecta. We also identify the source of the I-band secondary maximum in iPTF14bdn to be the decay of FeIII to FeII, as is seen in normal SNe Ia.2015ApJ...813...30Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/813/30CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/812/31 : Local Star Formation effects on type Ia SNe (Jones+, 2015)J/ApJ/805/74 : SN2014J Swift/UVOT light curves (Brown+, 2015)J/AJ/148/1 : Optical and ultraviolet photometry of SN 2012fr (Zhang+, 2014)J/A+A/554/A27 : 2011fe spectrophotometric time series (Pereira+, 2013)J/ApJ/749/18 : Swift/UVOT observations of 12 nearby SN-Ia (Brown+, 2012)J/AJ/142/156 : The CSP (DR2): photometry of SNe Ia (Stritzinger+, 2011)J/ApJ/721/1608 : Absolute UV magnitudes of type Ia SNe (Brown+, 2010)J/ApJ/716/712 : HST light curves of six SNe and Union2 (Amanullah+, 2010)J/AJ/139/519 : Carnegie supernova project. SNe Ia (Contreras+, 2010)J/ApJS/185/32 : First-year SDSS-II SN results (Kessler+, 2009)J/AJ/137/3731 : ESSENCE high-redshift supernova (Foley+, 2009)J/AJ/131/527 : UBVRI light curves of 44 type Ia supernovae (Jha+, 2006)J/ApJ/602/571 : High-redshift supernovae IRZ fluxes (Barris+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/813/30https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/813/30http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/813/30https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/813/30https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/813/30http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/813/30GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfraredOpticalUVdefaultJ/ApJ/813/30/table1Photometry of iPTF14bdnrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFiltFilter used in the observation (UBVRI, UVM2, UVW1 or UVW2) (1)instr.setup;obscharTelTelescope ("LJT"=Lijiang 2.4m Telescope, "TNT"=Tsinghua-NAOC Telescope or "UVOT" (Swift))meta.id;instr.telcharMJD[56804.7/56868.4] Modified Julian Date of the observationdtime.epochdoublemag[14.3/20.2] Observed magnitude in Filtmagphot.magfloate_mag[0.02/0.4] Error in magmagstat.error;phot.magfloatJ/ApJ/813/30/table4YFOSC instrument filter responsesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFilt[BIRUV] LJT/YFOSC filter name (UBVRI) (1)meta.id;instr.filtercharlambda[3130/11000] Wavelength; Angstroms0.1nmem.wlfloatTrans[-0.003/71.1] Throughput of Filt%phys.transmission;instr.filterfloat