J/A+A/698/A70ivo://CDS.VizieR/J/A+A/698/A70doi:10.26093/cds/vizier/bc-nt/lhaCDSZeng X.Luo Y.Wang X.Yang Y.Li X.Huang Y.Zheng S.Zheng S.,Huang Y.Li S.Howell D.A.Bostroem K.A.McCully C.Esamdin A.,Andrews M.Farah R.J.Newsome M.Zhang H.Zhang P.Hu L.2026-08-03T06:55:11Z2025-05-28T09:50:57ZCDS support team

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

cds-question@unistra.frsupernovaephotometryvisible-astronomyWe conducted an exhaustive analysis combining optical photometry and spectroscopy of the type Ia supernova designated SN 2023xqm. Our observational period spanned from the two weeks preceding to 88 days after the B-band peak luminosity time. We determined the peak brightness in the B-band to be -18.90+/-0.50mag, and it is accompanied by a moderately slow decay rate of 0.90+/-0.07mag. The maximum quasi-bolometric luminosity was estimated to be 1.52x10^43^erg/s and correlated with a calculated 56Ni mass of 0.74+/-0.05M_{sun}_, aligning with the modestly reduced rate of light curve decay. A plateau that can be observed in the r-i color curve might correlate with the minor elevation noted between the principal and secondary peaks of the i-band light curve. An initial spectral analysis of SN 2023xqm revealed distinct high-velocity features (HVFs) in CaII that contrast with the subdued HVFs observed in SiII. Such attributes may stem from variations in ionization or temperature or from scenarios involving enhanced element abundance, suggesting a naturally lower photospheric temperature for SN 2023xqm, which could be indicative of incomplete burning during the white dwarf's detonation. The observed traits in the light curve and the spectral features offer significant insights into the variability among type Ia supernovae and their explosion dynamics.2025A&A...698A..70Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/698/A70CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/698/A70https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/698/A70http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/698/A70https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/698/A70https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/698/A70http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/698/A70GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/698/A70/table1Photometric standards used in the SN 2023xqm fieldrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar sequential numbermeta.id;meta.mainintUmagU magnitudemagphot.mag;em.opt.Ufloate_UmagU magnitude errormagstat.error;phot.magfloatBmagB magnitudemagphot.mag;em.opt.Bfloate_BmagB magnitude errormagstat.error;phot.magfloatVmagV magnitudemagphot.mag;em.opt.Vfloate_VmagV magnitude errormagstat.error;phot.magfloatgmagg magnitudemagphot.mag;em.opt.Bfloate_gmagg magnitude errormagstat.error;phot.magfloatrmagr magnitudemagphot.mag;em.opt.Rfloate_rmagr magnitude errormagstat.error;phot.magfloatimagi magnitudemagphot.mag;em.opt.Ifloate_imagi magnitude errormagstat.error;phot.magfloatJ/A+A/698/A70/table2Optical photometric observations (UBVgri) of SN 2023xqmrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian datedtime.epochdoubleUmag? U magnitudemagphot.mag;em.opt.Ufloatnullablee_Umag? U magnitude errormagstat.error;phot.magfloatnullableBmagB magnitudemagphot.mag;em.opt.Bfloate_BmagB magnitude errormagstat.error;phot.magfloatVmagV magnitudemagphot.mag;em.opt.Vfloate_VmagV magnitude errormagstat.error;phot.magfloatgmagg magnitudemagphot.mag;em.opt.Bfloate_gmagg magnitude errormagstat.error;phot.magfloatrmagr magnitudemagphot.mag;em.opt.Rfloate_rmagr magnitude errormagstat.error;phot.magfloatimagi magnitudemagphot.mag;em.opt.Ifloate_imagi magnitude errormagstat.error;phot.magfloat