J/MNRAS/433/2240ivo://CDS.VizieR/J/MNRAS/433/2240doi:10.26093/cds/vizier.74332240CDSGaneshalingam M.Li W.Filippenko A.V.2024-07-22T20:13:19Z2014-09-03T13:53:50ZCDS support team

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

cds-question@unistra.frsupernovaestellar-distanceWe present a cosmological analysis of the Lick Observatory Supernova Search (LOSS) Type Ia supernova (SN Ia) photometry sample introduced by Ganeshalingam et al. (2010ApJS..190..418G, Cat. J/ApJS/190/418). These supernovae (SNe) provide an effective anchor point to estimate cosmological parameters when combined with data sets at higher redshift. The data presented by Ganeshalingam et al. have been rereduced in the natural system of the Katzman Automatic Imaging Telescope (KAIT) and Nickel telescopes to minimize systematic uncertainties. We have run the light-curve-fitting software SALT2 on our natural-system light curves to measure light-curve parameters for LOSS light curves and available SN Ia data sets in the literature. We present a Hubble diagram of 586 SNe in the redshift range z=0.01-1.4 with a residual scatter of 0.176mag. Of the 226 low-z SNe Ia in our sample, 91 objects are from LOSS, including 45 without previously published distances. Assuming a flat Universe, we find that the best fit for the dark energy equation-of-state parameter w=-0.86^+0.13^_-0.16_(stat)+/-0.11(sys) from SNe alone, consistent with a cosmological constant. Our data prefer a Universe with an accelerating rate of expansion with 99.999% confidence. When looking at Hubble residuals as a function of host-galaxy morphology, we do not see evidence for a significant trend, although we find a somewhat reduced scatter in Hubble residuals from SNe residing within a projected distance <10kpc of the host-galaxy nucleus ({sigma}=0.156mag). Similar to the results of Blondin, Mandel and Kirshner and Silverman et al. (2012AJ....143..126B, Cat. J/AJ/143/126), we find that Hubble residuals do not correlate with the expansion velocity of SiII{lambda}6355 measured in optical spectra near maximum light. Our data are consistent with no presence of a local "Hubble bubble". Improvements in cosmological analyses within low-z samples can be achieved by better constraining calibration uncertainties in the zero-points of photometric systems.2013MNRAS.433.2240Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/433/2240CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/143/126 : Spectroscopy of 462 nearby Type Ia supernovae (Blondin+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/433/2240https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/433/2240http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/433/2240https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/433/2240https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/433/2240http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/433/2240GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/433/2240/table3 (SALT2 parameters and distances for SNe)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/433/2240/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/433/2240/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/433/2240/table3?GETtext/xml+votable180.050000true268.711416718.33069440.0055555555555555566/34 224 626 1700 1796 2038 2142 2169 2227 2232 2251 2254 2340 2347 2353 2379 2391 2473 2608 2641 3393 4416 4577 4583 4684 4719 5095 5100 5129 5680 5995 6101 6114 6178 6501 6549 6585 6877 6962 7044 7091 7166 7450 7681 7747 7923 8341 8403 8435 8479 8526 8927 9036 9136 9449 9560 9614 9640 9698 9751 9794 9840 10144 10232 10397-10398 10428 10563 10734 10767 10789 11064 11158 11181 11252 11273 11403 11424-11425 11427-11428 11672 12103 12123 12367 12455 12585 13313 13350 13399 13505 13514 13536 14009 14733 14882 14907 15085 16584 16690 16852 17152 17197 17239 17401 17500 17662-17663 17683 17686 17689 17692 17727 17750 17752-17754 17756 17765 17770 17776-17778 17811 17813 17816 17818 17827 17831 17837 17840 17856-17857 17981 17999 18001-18002 18007 18010 18014 18020-18022 18033 18063 18065-18066 18072 18077 18083-18086 18091 18093-18094 18097 18112 18394 18535 18686-18687 18735 18749 18751 18753 18769 18792 18794 18800 18836 18841 18843 18851 18856 18882 19031 19034-19036 19038 19041 19043 19048-19049 19051-19052 19054 19062 19087 19090-19091 19094 19098 19102 19107-19108 19115 19120 19227 19241 19283 19298 19387 19456-19458 19515 19551 19554 19560 19729 19797 19848 20090 20140 20237 20283 20353 20370 21138 21857 22425 22826 23013 23028 23102 23179 23182 23186 23192 23197 23203 23205 23211 23214 23294 23916 24131 24716 24920 24969 25079 25333 25439 25491 25615 25889 25982 26268 26392 26563 27174 27247 27256 27258-27259 27348 27420 27491 27634 27761 27906 27910 28040 28075 28089 28112 28249 28353 28356 28368 28414 28453 28498 30034-30035 30037-30038 30042 30044 30049 30055 30065 31218 31293 31313 32129 32136 32307 32340 32561 32569 32602 32620 33628 33839 34530 34554 34897 35629 35844 35935 36253 36473 36805 36861 36863 37580 38613 38683 40882 43713 43827-43828 43855 43877 44001 44359 45041 45418 45500 45744 45821 45823 45844 45983 46394 46561 46882 47170 48075 48478-48479 48500-48501 48898https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/433/2240?format=asciiOpticaldefaultJ/MNRAS/433/2240/table3SALT2 parameters and distances for SNeSNSN namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintzCMBRedshift in CMB framesrc.redshiftfloatBmagB magnitudemagphot.mag;meta.modelledfloate_Bmag1-{sigma} uncertainty on Bmagmagstat.error;phot.mag;em.opt.Bfloatx1SALT2 light-curve widthmagstat.fit.paramfloate_x11-{sigma} uncertainty on x1magstat.errorfloatcSALT2 colour (related to (B-V)_max_)magstat.fit.paramfloate_c1-{sigma} uncertainty on cmagstat.errorfloatmuDistance modulusmagphot.mag.distModfloate_mu1-{sigma} uncertainty on mumagstat.errorfloatSampleSample name (1)meta.id;src.samplecharRefReference (2)meta.ref;pos.frameintNEDSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainSimbadNameSimbad column added by the CDSmeta.idchar