J/ApJ/895/118ivo://CDS.VizieR/J/ApJ/895/118doi:10.26093/cds/vizier.18950118CDSBurns C.R.Ashall C.Contreras C.Brown P.Stritzinger M.,Phillips M.M.Flores R.Suntzeff N.B.Hsiao E.Y.Uddin S.Simon J.D.,Krisciunas K.Campillay A.Foley R.J.Freedman W.L.Galbany L.,Gonzalez C.Hoeflich P.Holmbo S.Kilpatrick C.D.Kirshner R.P.,Morrell N.Munoz-elgueta N.Piro A.L.Rojas-bravo C.Sand D.,Vargas-gonzalez J.Ulloa N.Vilchez J.A.2022-03-10T07:11:09Z2021-10-07T07:21:45ZCDS support team

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

cds-question@unistra.frsupernovaeinfrared-photometryvisible-astronomyWide-band photometryWe present photometric and spectroscopic observations of SN2013aa and SN2017cbv, two nearly identical type Ia supernovae (SNeIa) in the host galaxy NGC5643. The optical photometry has been obtained using the same telescope and instruments used by the Carnegie Supernova Project. This eliminates most instrumental systematics and provides light curves in a stable and well-understood photometric system. Having the same host galaxy also eliminates systematics due to distance and peculiar velocity, providing an opportunity to directly test the relative precision of SNeIa as standard candles. The two SNe have nearly identical decline rates, negligible reddenings, and remarkably similar spectra, and, at a distance of ~20Mpc, they are ideal potential calibrators for the absolute distance using primary indicators such as Cepheid variables. We discuss to what extent these two SNe can be considered twins and compare them with other supernova "siblings" in the literature and their likely progenitor scenarios. Using 12 galaxies that hosted two or more SNe Ia, we find that when using SNeIa, and after accounting for all sources of observational error, one gets consistency in distance to 3%.2020ApJ...895..118Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/895/118CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/183 : UBVRI Photometric Standards (Landolt 1992)J/ApJ/645/488 : SN type Ia luminosities (Wang+, 2006)J/AJ/154/211 : The CSP (DR3) photometry of low-z SNe Ia (Krisciunas, 2017)J/ApJ/863/90 : Optical and NIR LCs of the nearby SN 2017cbv (Wee+, 2018)J/ApJ/869/167 : Improved empirical models for Type Ia SNe (Saunders+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/895/118https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/895/118http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/895/118https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/895/118https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/895/118http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/895/118GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/895/118/tablea2 (Optical local sequence photometry of SN2013aa and SN2017cbv)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/895/118/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/895/118/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/895/118/tablea2?GETtext/xml+votable180.050000true218.16180389-44.242950.005555555555555556Cone search capability for table J/ApJ/895/118/tablea3 (NIR local sequence photometry for SN2013aa)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/895/118/tablea3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/895/118/tablea3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/895/118/tablea3?GETtext/xml+votable180.050000true218.16194194-44.242981110.0055555555555555566/43339https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/895/118?format=asciiOpticalInfrareddefaultJ/ApJ/895/118/tablea1Natural system photometry of SN2013aa and SN2017cbvrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of the supernova (1)meta.id;meta.maincharMJD[56338/58309] Date of observation, JD-2400000.5dtime.epochdoubleFiltFilter used for observationinstr.setup;instr.filtercharOmag[11.6/22.7] Magnitude of observation in Filter (2)magphot.mag;em.opt.Bfloate_Omag[0.005/0.4] Uncertainty in the magnitudemagstat.error;phot.magfloatPhase[-18.4/542] Number of days relative to B maximumdmeta.numberdoubleJ/ApJ/895/118/tablea2Optical local sequence photometry of SN2013aa and SN2017cbvrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of supernovameta.id.parentcharID[1/44] Local sequence star ID numbermeta.id;meta.mainintRAJ2000[218.01/218.26] Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-44.3/-44.1] Declination (J2000)degpos.eq.dec;meta.mainBmag[12.2/19]? Standard B magnitude (1)magphot.mag;em.opt.Bfloatnullablee_Bmag[0.002/0.2]? 1-sigma error in B magnitudemagstat.error;phot.magfloatnullableVmag[11.6/18.2]? Standard V magnitude (1)magphot.mag;em.opt.Bfloatnullablee_Vmag[0.003/0.03]? 1-sigma error in V magnitudemagstat.error;phot.magfloatnullableupmag[13.1/19.5]? Standard u' magnitude (1)magphot.mag;em.opt.Ufloatnullablee_upmag[0.005/0.2]? 1-sigma error in u' magnitudemagstat.error;phot.magfloatnullablegpmag[11.9/18.5]? Standard g' magnitude (1)magphot.mag;em.opt.Bfloatnullablee_gpmag[0.003/0.02]? 1-sigma error in g' magnitudemagstat.error;phot.magfloatnullablerpmag[11.5/18]? Standard r' magnitude (1)magphot.mag;em.opt.Rfloatnullablee_rpmag[0.003/0.02]? 1-sigma error in r' magnitudemagstat.error;phot.magfloatnullableipmag[11.3/17.9]? Standard i' magnitude (1)magphot.mag;em.opt.Ifloatnullablee_ipmag[0.002/0.02]? 1-sigma error in i' magnitudemagstat.error;phot.magfloatnullablebmag[12.2/19]? Natural B magnitude (2)magphot.mag;em.opt.Bfloatnullablee_bmag[0.002/0.2]? 1-sigma error in b magnitudemagstat.error;phot.magfloatnullablevmag[11.6/18.2]? Natural V magnitude (2)magphot.mag;em.opt.Bfloatnullablee_vmag[0.003/0.03]? 1-sigma error in v magnitudemagstat.error;phot.magfloatnullableumag[13/19.5]? Natural u magnitude (2)magphot.mag;em.opt.Ufloatnullablee_umag[0.005/0.2]? 1-sigma error in u magnitudemagstat.error;phot.magfloatnullablegmag[11.9/18.6]? Natural g magnitude (2)magphot.mag;em.opt.Bfloatnullablee_gmag[0.003/0.02]? 1-sigma error in g magnitudemagstat.error;phot.magfloatnullablermag[11.5/18]? Natural r magnitude (2)magphot.mag;em.opt.Rfloatnullablee_rmag[0.003/0.03]? 1-sigma error in r magnitudemagstat.error;phot.magfloatnullableimag[11.3/17.9]? Natural i magnitude (2)magphot.mag;em.opt.Ifloatnullablee_imag[0.002/0.02]? 1-sigma error in i magnitudemagstat.error;phot.magdoublenullableJ/ApJ/895/118/tablea3NIR local sequence photometry for SN2013aarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/114] Local sequence star ID numbermeta.id;meta.mainintRAJ2000[218.1/218.17] Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-44.25/-44.19] Declination (J2000)degpos.eq.dec;meta.mainYmag[12.4/16.3] Standard Y magnitude (1)magphot.mag;em.IR.Jfloate_Ymag[0.03/0.06] 1-sigma error in Y magnitudemagstat.error;phot.magfloatJmag[12/16] Standard J magnitude (2)magphot.mag;em.IR.Jfloate_Jmag[0.02/0.08] 1-sigma error in J magnitudemagstat.error;phot.magfloatHmag[11.3/15.8] Standard H magnitude (2)magphot.mag;em.IR.Hfloate_Hmag[0.02/0.2] 1-sigma error in H magnitudemagstat.error;phot.magfloatjmag[12/16] Natural J magnitude (1)magphot.mag;em.IR.Jfloate_jmag[0.02/0.08] 1-sigma error in j magnitudemagstat.error;phot.magfloathmag[11.3/15.8] Natural H magnitude (1)magphot.mag;em.IR.Hfloate_hmag[0.02/0.2] 1-sigma error in h magnitudemagstat.error;phot.magdouble