J/MNRAS/453/3649ivo://CDS.VizieR/J/MNRAS/453/3649doi:10.26093/cds/vizier.74533649CDSPastorello A.Prieto J.L.Elias-Rosa N.Bersier D.Hosseinzadeh G.,Morales-Garoffolo A.Noebauer U.M.Taubenberger S.Tomasella L.,Kochanek C.S.Falco E.Basu U.Beacom J.F.Benetti S.Brimacombe J.,Cappellaro E.Danilet A.B.Dong S.Fernandez J.M.Goss N.Granata V.,Harutyunyan A.Holoien T.W.-S.Ishida E.E.O.Kiyota S.Krannich G.,Nicholls B.Ochner P.Pojmanski G.Shappee B.J.Simonian G.V.,Stanek K.Z.Starrfield S.Szczygiel D.Tartaglia L.Terreran G.,Thompson T.A.Turatto M.Wagner R.M.Wiethoff W.S.Wilber A.,Wozniak P.R.2024-08-15T20:15:24Z2020-01-14T08:35:10ZCDS support team

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

cds-question@unistra.frsupernovaevisible-astronomybroad-band-photometrysloan-photometryWe present the results of the spectroscopic and photometric monitoring campaign of ASASSN-15ed. The transient was discovered quite young by the All Sky Automated Survey for SuperNovae (ASAS-SN) survey. Amateur astronomers allowed us to sample the photometric SN evolution around maximum light, which we estimate to have occurred on JD=2457087.4+/-0.6 in the r band. Its apparent r-band magnitude at maximum was r=16.91+/-0.10, providing an absolute magnitude M_r_~-20.04+/-0.20, which is slightly more luminous than the typical magnitudes estimated for Type Ibn SNe. The post-peak evolution was well monitored, and the decline rate (being in most bands around 0.1 mag/d during the first 25 d after maximum) is marginally slower than the average decline rates of SNe Ibn during the same time interval. The object was initially classified as a Type Ibn SN because early-time spectra were characterized by a blue continuum with superimposed narrow P-Cygni lines of HeI, suggesting the presence of a slowly moving (1200-1500 km/s), He-rich circumstellar medium. Later on, broad P-Cygni HeI lines became prominent. The inferred velocities, as measured from the minimum of the broad absorption components, were between 6000 and 7000 km/s. As we attribute these broad features to the SN ejecta, this is the first time we have observed the transition of a Type Ibn SN to a Type Ib SN.2015MNRAS.453.3649Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/453/3649CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/MNRAS/449/1921 : UV/optical/NIR photometry for Type Ibn SNeJ/MNRAS/449/1941 : Optical/NIR photometry of OGLE-2012-SN-006J/MNRAS/467/1098 : ASAS-SN bright supernova catalogue 2015 (Holoien+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/453/3649https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/453/3649http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/453/3649https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/453/3649https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/453/3649http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/453/3649GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap3.322582951404819e-19 4.920466254354166e-19OpticaldefaultJ/MNRAS/453/3649/table1Photometric data for ASASSN-15edrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateDate of observationtime.epochnullableJDJulian Datedtime.epochdoubleBmag[18.08/22.36]? Johnson B band magnitudemagphot.mag;em.opt.Bfloatnullablee_Bmag[0.04/0.68]? Uncertainty in Bmag (1)magstat.error;phot.mag;em.opt.Bfloatnullablel_Vmag[>] Limit flag on Vmagmeta.code.errorcharVmag[17.11/22.36]? Johnson V band magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag[0.04/0.54]? Uncertainty in Vmag (1)magstat.error;phot.mag;em.opt.Vfloatnullablel_umag[>] Limit flag on umagmeta.code.errorcharumag[18.33/21.56]? Sloan u band magnitudemagphot.mag;em.opt.Ufloatnullablee_umag[0.03/0.48]? Uncertainty in umag (1)magstat.error;phot.mag;em.opt.Ufloatnullablel_gmag[>] Limit flag on gmagmeta.code.errorchargmag[17.58/23.62]? Sloan g band magnitudemagphot.mag;em.opt.Bfloatnullablee_gmag[0.04/0.46]? Uncertainty in gmag (1)magstat.error;phot.mag;em.opt.Bfloatnullablel_rmag[>] Limit flag on rmagmeta.code.errorcharrmag[16.92/23.52]? Sloan r band magnitudemagphot.mag;em.opt.Rfloatnullablee_rmag[0.03/0.36]? Uncertainty in rmag (1)magstat.error;phot.mag;em.opt.Rfloatnullablel_imag[>] Limit flag on imagmeta.code.errorcharimag[17.58/23.08]? Sloan i band magnitudemagphot.mag;em.opt.Ifloatnullablee_imag[0.03/0.28]? Uncertainty in imag (1)magstat.error;phot.mag;em.opt.Ifloatnullablel_zmag[>] Limit flag on zmagmeta.code.errorcharzmag[17.69/22.4]? Sloan z band magnitudemagphot.mag;em.opt.Ifloatnullablee_zmag[0.04/0.45]? Uncertainty in zmag (1)magstat.error;phot.mag;em.opt.IfloatnullableInstInstrumentmeta.id;instrcharn_Inst[ab] Note on Inst (2)meta.notecharJ/MNRAS/453/3649/tablea1Pseudo-bolometric data for ASASSN-15edrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPhase[-12.96/66.28] Phase from the r-band maximumdtime.phasefloatl_logL[<] Limit flag on logLmeta.code.errorcharlogL[40.66/43.336] Log pseudo-bolometric luminosity (in erg/s)log(1e-07W)phys.luminosityfloate_logL[0.063/0.076]? Uncertainty in logLlog(1e-07W)stat.errorfloatnullable