J/A+A/703/A62ivo://CDS.VizieR/J/A+A/703/A62CDSMatilainen K.K.Kankare E.Mattila S.Reguitti A.Pignata G.,Brimacombe J.Pastorello A.Fraser M.Brennan S.J.Anderson J.P.,Ayala-Inostroza B.Cartier R.Charalampopoulos P.Chen T.-W.,Gromadzki M.Gutierrez C.P.Inserra C.Muller-Bravo T.E.Nicholl M.,Prieto J.L.Ragosta F.Reynolds T.M.Salmaso I.Young D.R.2026-03-02T06:25:50Z2025-11-06T07:39:58ZCDS support team

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

cds-question@unistra.frsupernovaevisible-astronomybroad-band-photometryinfrared-photometryThe interacting transient SN 2016cvk (ASASSN-16jt) is a member of the peculiar SN 2009ip-like events. We present our follow-up data and aim to draw conclusions about the physical nature of the progenitor system. Our spectrophotometric data set of SN 2016cvk covers the ultraviolet, optical, and near-infrared wavelength region extending to +1681d from the light curve peak; the data is analysed and compared to other SN 2009ip-like transients. Archival data reveals pre-outbursts of the progenitor with the first detection at -1219d. The light curve evolution of SN 2016cvk consists of two consecutive luminous events A and B with peak magnitudes of M_V_<-15.6 and M_r_=-18.3mag, respectively. The spectra are dominated by Balmer emission lines that have a complex, multi-component evolution similar to other SN 2009ip-like targets. SN 2016cvk is among the first detected SN 2009ip-like events that show early 'flash ionisation' features of CIII, NIII, and HeII, lasting for 16+/-5d. Our late-time +405d spectrum shows forbidden [CaII], [FeII], and [OI] features with the latter detected particularly clearly for a SN 2009ip-like event. The evolution of SN 2016cvk is similar to other SN 2009ip-like transients, with some uncommon traits. The lack of a double-peaked structure in the Balmer lines is likely caused by differences in the circumstellar medium structure or viewing angle. The flash features in the early spectra propose abundances consistent with a red, yellow, or blue supergiant progenitor rather than for example a luminous blue variable. The detection of [OI] in the +405d spectrum suggests possible evidence of nucleosynthesised material generated in a SN explosion.2025A&A...703A..62Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/703/A62CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/703/A62https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/703/A62http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/703/A62https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/703/A62https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/703/A62http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/703/A62GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/A+A/703/A62/photomPhotometry of SN 2016cvkrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date (JD-2400000)dtime.epochfloattTime from r-band peakdtime.epochfloatumag? Magnitude in u bandmagphot.mag;em.opt.Ufloatnullablee_umag? Error of magnitude in u bandmagstat.error;phot.magfloatnullableBmag? Magnitude in B bandmagphot.mag;em.opt.Bfloatnullablee_Bmag? Error of magnitude in B bandmagstat.error;phot.magfloatnullablegmag? Magnitude in g bandmagphot.mag;em.opt.Bfloatnullablee_gmag? Error of magnitude in g bandmagstat.error;phot.magfloatnullablel_VmagLimit flag on V band magnitudemeta.code.errorcharVmag? Magnitude in V bandmagphot.mag;em.opt.Vfloatnullablee_Vmag? Error of magnitude in V bandmagstat.error;phot.magfloatnullablel_rmagLimit flag on r band magnitudemeta.code.errorcharrmag? Magnitude in r bandmagphot.mag;em.opt.Rfloatnullablee_rmag? Error of magnitude in r bandmagstat.error;phot.magfloatnullableimag? Magnitude in i bandmagphot.mag;em.opt.Ifloatnullablee_imag? Error of magnitude in i bandmagstat.error;phot.magfloatnullablezmag? Magnitude in z bandmagphot.mag;em.opt.Ifloatnullablee_zmag? Error of magnitude in z bandmagstat.error;phot.magfloatnullableYmag? Magnitude in Y bandmagphot.mag;em.IR.Jfloatnullablee_Ymag? Error of magnitude in Y bandmagstat.error;phot.magfloatnullableTelTelescope, instrumentinstrchar