J/ApJ/949/75ivo://CDS.VizieR/J/ApJ/949/75doi:10.26093/cds/vizier/ba-xn-2bCDSVazquez J.Kilpatrick C.D.Dimitriadis G.Foley R.J.Piro A.L.,Rest A.Rojas-Bravo C.2026-07-02T11:59:24Z2025-08-28T12:20:11ZCDS support team

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

cds-question@unistra.frsupernovaeinfrared-photometryvisible-astronomybroad-band-photometryspectroscopyWe present pre- and postexplosion observations of the Type II-P supernova (SN II-P) 2019mhm located in NGC 6753. Based on optical spectroscopy and photometry, we show that SN 2019mhm exhibits broad lines of hydrogen with a velocity of -8500R+/-200km/s and a 111+/-2d extended plateau in its luminosity, typical of the Type II-P subclass. We also fit its late-time bolometric light curve and infer that it initially produced a ^56^Ni mass of 1.3x10^-2^+/-5.5x10^-4^M_{sun}_. Using imaging from the Wide Field Planetary Camera 2 on the Hubble Space Telescope obtained 19yr before explosion, we aligned to a postexplosion Wide Field Camera 3 image and demonstrate that there is no detected counterpart to the SN to a limit of >24.53mag in F814W, corresponding to an absolute magnitude limit of M_F814W_{<}-7.7mag. Comparing to massive-star evolutionary tracks, we determine that the progenitor star had a maximum zero-age main-sequence mass <17.5M_{sun}_, consistent with other SN II-P progenitor stars. SN 2019mhm can be added to the growing population of SNe II-P with both direct constraints on the brightness of their progenitor stars and well-observed SN properties.2023ApJ...949...75Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/949/75CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)VIII/89 : Northern HI Parkes All Sky Survey Catalogue (HIPASS) (Wong+, 2006)J/MNRAS/433/1871 : UBVRI griz light curves of SN 2012aw (Bose+, 2013)J/MNRAS/445/2677 : Peculiar velocities in 6dFGS (Springob+, 2014)J/MNRAS/459/3939 : Type II supernova light curves (Valenti+, 2016)J/MNRAS/461/2003 : SN 2013ej LCs 1 to 450d after explosion (Yuan+, 2016)J/MNRAS/478/3138 : Cool supergiants in Magellanic Clouds (Davies+, 2018)J/ApJ/885/43 : UBVRI & ugriz phot. of supernova SN 2017gmr (Andrews+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/949/75https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/949/75http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/949/75https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/949/75https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/949/75http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/949/75GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/ApJ/949/75/table1Photometry of SN 2019mhmrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJD[58697.8/59309.9] Modified Julian Date of observation (JD-2400000.5)dtime.epochdoubleFiltFilter (B, V, u, g, r, i, F300X, or F814W)meta.id;instr.filtercharl_omagLimit flag on omagmeta.code.error;phot.magcharomag[16.53/27.21] Observed AB magnitude in Filtmagphot.magfloate_omag[0.013/0.4]? Uncertainty in omagmagstat.error;phot.magfloatnullableTelSource (1)meta.id;instr.telchar