J/MNRAS/481/894ivo://CDS.VizieR/J/MNRAS/481/894doi:10.26093/cds/vizier.74810894CDSPursiainen M.Childress M.Smith M.Prajs S.Sullivan M.Davis T.M.,Foley R.J.Asorey J.Calcino J.Carollo D.Curtin C.D'Andrea C.B.,Glazebrook K.Gutierrez C.Hinton S.R.Hoormann J.K.Inserra C.,Kessler R.King A.Kuehn K.Lewis G.F.Lidman C.Macaulay E.,Moller A.Nichol R.C.Sako M.Sommer N.E.Swann E.Tucker B.E.,Uddin S.A.Wiseman P.Zhang B.Abbott T.M.C.Abdalla F.B.Allam S.,Annis J.Avila S.Brooks D.Buckley-Geer E.Burke D.L.,Carnero Rosell A.Carrasco Kind M.Carretero J.Castander F.J.,Cunha C.E.Davis C.De Vicente J.Diehl H.T.Doel P.Eifler T.F.,Flaugher B.Fosalba P.Frieman J.Garcia-Bellido J.Gruen D.,Gruendl R.A.Gutierrez G.Hartley W.G.Hollowood D.L.Honscheid K.,James D.J.Jeltema T.Kuropatkin N.Li T.S.Lima M.Maia M.A.G.,Martini P.Menanteau F.Ogando R.L.C.Plazas A.A.Roodman A.,Sanchez E.Scarpine V.Schindler R.Smith R.C.Soares-Santos M.,Sobreira F.Suchyta E.Swanson M.E.C.Tarle G.Tucker D.L.,Walker A.R.(the DES Collaboration)2024-08-19T20:14:32Z2022-07-04T13:09:28ZCDS support team

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

cds-question@unistra.frsupernovaeWe present the results of a search for rapidly evolving transients in the Dark Energy Survey Supernova Programme. These events are characterized by fast light-curve evolution (rise to peak in ~<10d and exponential decline in ~<30d after peak). We discovered 72 events, including 37 transients with a spectroscopic redshift from host galaxy spectral features. The 37 events increase the total number of rapid optical transients by more than a factor of two. They are found at a wide range of redshifts (0.05<z<1.56) and peak brightnesses (-15.75>M_g_>-22.25). The multiband photometry is well fit by a blackbody up to few weeks after peak. The events appear to be hot (T~10000-30000K) and large (R~10^14^-2x10^15^cm) at peak, and generally expand and cool in time, though some events show evidence for a receding photosphere with roughly constant temperature. Spectra taken around peak are dominated by a blue featureless continuum consistent with hot, optically thick ejecta. We compare our events with a previously suggested physical scenario involving shock breakout in an optically thick wind surrounding a core-collapse supernova, we conclude that current models for such a scenario might need an additional power source to describe the exponential decline. We find that these transients tend to favour star-forming host galaxies, which could be consistent with a core-collapse origin. However, more detailed modelling of the light curves is necessary to determine their physical origin.2018MNRAS.481..894Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/481/894CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/481/894https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/481/894http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/481/894https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/481/894https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/481/894http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/481/894GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/481/894/table4 (The 72 rapidly evolving transients including 37 with spectroscopic redshift)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/481/894/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/481/894/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/481/894/table4?GETtext/xml+votable180.050000true35.0325-5.11014720.0055555555555555565/4436 8983 6/17669 17679-17680 17683 17686 17688-17689 17691-17693 17712 17750 17752-17753 35383 35388 35390 35475 35927 35953 35956-35957 36104 36106-36107https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/481/894?format=asciidefaultJ/MNRAS/481/894/table3Basic information of the host galaxies of the whole samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSampleSample name (G1)meta.id;src.samplecharNameTransient DES name (DESYYANaaaa)meta.id;meta.maincharf_Name[*] Flag on Name (1)meta.codecharSurveyObserving surveymeta.notecharAOffset? Angular offsetarcsecpos;arith.difffloatnullablePOffset? Physical transient offsetkpcpos;arith.difffloatnullableDLR? Directional Light Radius (2)pos.distance;src.orbitalfloatnullablezspec? Spectroscopic redshift of the host galaxy (3)src.redshiftfloatnullablezphot? Photometric redshift of the host galaxy (Bonnett et al. 2016PhRvD..94d2005B)src.redshiftfloatnullableJ/MNRAS/481/894/table4The 72 rapidly evolving transients including 37 with spectroscopic redshiftSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSampleSample name (G1)meta.id;src.samplecharNameTransient DES name (DESYYANaaaa)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainzspec? Spectroscopic resdshift (1)src.redshift;pos.heliocentricfloatnullableE(B-V)Milky way colour excesses from Schlafly & Finkbeiner (2011ApJ...737..103S)magphot.color.excessfloatJ/MNRAS/481/894/table5Light-curve parameters of gold and silver sample transients in g bandGmagpeakPeak magnitude on the g bandmagphot.mag;em.opt.Rfloate_GmagpeakError on Mpeakmagstat.errorfloattrise? Time between last non-detection and observed peak (1)dtime.intervalfloatnullabletdecline? Time exponential fit takes to decline to one tenth of the observed peak flux (1)dtime.intervalfloatnullableE_tdecline? Upper error on tdecline (1)dstat.error;stat.maxfloatnullablee_tdecline? Lower error on tdecline (1)dstat.errorfloatnullablet1/2? Time above half maximum (1)dtime.intervalfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSampleSample name (G1)meta.id;src.samplecharNameTransient DES name (DESYYANaaaa)meta.id;meta.mainchartpeakDate of the maximum observed g band fluxdtime.epochintJ/MNRAS/481/894/table6The best-fitting parameters for a blackbody at peakrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTpeakTemperature from best blackbody fit (1)1000Kphys.temperaturefloatE_TpeakUpper error on Tpeak1000Kstat.error;stat.maxfloate_TpeakLower error on Tpeak1000Kstat.errorfloatrpeakRadius of the transient from best blackbody fit1e+14cmphys.angSize;srcfloatE_rpeakUpper error on rpeak1e+14cmstat.error;stat.maxfloate_rpeakLower error on rpeak1e+14cmstat.errorfloatLpeakLuminosity from best blackbody fit1e-07Wphys.luminosityfloatE_LpeakUpper error on Lpeak1e-07Wstat.error;stat.maxfloate_LpeakLower error on Lpeak1e-07Wstat.errorfloatNdataNumber of data points the fit was based onmeta.numberintSampleSample name (G1)meta.id;src.samplecharNameTransient DES name (DESYYANaaaa)meta.id;meta.mainchar