J/ApJ/925/217ivo://CDS.VizieR/J/ApJ/925/217doi:10.26093/cds/vizier.19250217CDSDutta A.Sahu D.K.Anupama G.C.Joharle S.Kumar B.Nayana J. A,Singh A.Kumar H.Bhalerao V.Barway S.2024-09-05T20:09:43Z2023-10-05T12:17:54ZCDS support team

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

cds-question@unistra.frsupernovaevisible-astronomyspectroscopyinfrared-photometrybroad-band-photometryWe present optical UBVRI photometry and low-to-medium resolution spectroscopic observations of type Iax supernova SN 2020sck spanning -5.5 days to +67 days from maximum light in the B-band. From the photometric analysis we find {Delta}m_B_(15)=2.03+/-0.05mag and M_B_=-17.81+/-0.22mag. Radiation diffusion model fit to the quasi-bolometric light curve indicates 0.13+/-0.02M_{sun}_ of ^56^Ni and 0.34M_{sun}_ of ejecta are synthesized in the explosion. Comparing the observed quasi-bolometric light curve with the angle-averaged bolometric light curve of a three-dimensional pure deflagration explosion of Mch carbon-oxygen white dwarf, we find agreement with a model in which 0.16M_{sun}_ of ^56^Ni and 0.37M_{sun}_ of ejecta is formed. By comparing the +1.4 days spectrum of SN 2020sck with synthetic spectrum generated using SYN++, we find absorption features due to CII, CIII, and OI. These are unburned materials in the explosion and indicate a C-O white dwarf. One- dimensional radiative transfer modeling of the spectra with TARDIS shows higher density in the ejecta near the photosphere and a steep decrease in the outer layers with an ejecta composition dominated mostly by C, O, Si, Fe, and Ni. The star-formation rate of the host galaxy computed from the luminosity of the H{alpha} ({lambda}6563) line is 0.09M_{sun}_/yr, indicating a relatively young stellar environment.2022ApJ...925..217Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/925/217CatalogResearchIsServedByTAP VizieR generic servicerelated-toVII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)J/A+A/333/231 : O-M stars model atmospheres (Bessell+ 1998)J/MNRAS/383/1485 : BVRI light curves of SN 2003jd (Valenti+, 2008)J/ApJ/699/L139 : Spectral parameters of SNe Ia (Wang+, 2009)J/A+A/561/A146 : SN 2010ae optical spectra (Stritzinger+, 2014)J/MNRAS/446/3895 : The rising light curves of Type Ia supernovae (Firth+, 2015)J/A+A/675/A195 : ZTF DR11 classif. in ZTF/4MOST sky (Sanchez-Saez+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/925/217https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/925/217http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/925/217https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/925/217https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/925/217http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/925/217GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/ApJ/925/217/fig2HCT, GIT and DOT photometry of SN 2020sckrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTelTelescope (1)meta.id;instr.telcharJDJulian Date of observationdtime.epochdoubleDateObservation Datetime.epoch;obsnullablePhase[-5.38/127.56] Phase; time since B-band maximum (2459098.84)dtime.phasefloatFiltFilter (UBVRIgrir')meta.notecharomag[16/21.4] Observed magnitude in Filtmagphot.magfloate_omag[0.005/0.3] Uncertainty in omagmagstat.error;phot.magfloatJ/ApJ/925/217/table9Log of spectroscopic observations of SN 2020sck from the 2.0m Himalayan Chandra Telescope (HCT)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJD[93.31/126.34] Julian Date; JD-2459000dtime.epochfloatDateDate of observation (UT)time.epochnullablePhase[-5.53/27.5] Phase; time since B-band maximum (JD2459098.84)dtime.phasefloatRange1Wavelength range in {AA} (grism Gr7)0.1nminstr.bandwidthcharRange2Wavelength range in {AA} (grism Gr8)0.1nminstr.bandwidthcharspDownload the ASCII file of the spectrummeta.ref.urlchar