Abstract
Abstract We present final natural-system optical (ugriBV) and near-infrared (YJH) photometry of 134 supernovae (SNe) with probable white dwarf progenitors that were observed in 2004–2009 as part of the first stage of the Carnegie Supernova Project (CSP-I). The sample consists of 123 Type Ia SNe, 5 Type Iax SNe, 2 super-Chandrasekhar SN candidates, 2 Type Ia SNe interacting with circumstellar matter, and 2 SN 2006bt-like events. The redshifts of the objects range from to 0.0835; the median redshift is 0.0241. For 120 (90%) of these SNe, near-infrared photometry was obtained. Average optical extinction coefficients and color terms are derived and demonstrated to be stable during the five CSP-I observing campaigns. Measurements of the CSP-I near-infrared bandpasses are also described, and near-infrared color terms are estimated through synthetic photometry of stellar atmosphere models. Optical and near-infrared magnitudes of local sequences of tertiary standard stars for each supernova are given, and a new calibration of Y-band magnitudes of the Persson et al. standards in the CSP-I natural system is presented.
Highlights
Type Ia supernovae (SNe) are generally agreed to be the result of a carbon–oxygen white dwarf that undergoes a thermonuclear runaway (Hoyle & Fowler 1960) owing to mass accretion in a binary system (Wheeler & Hansen 1971)
This combined data set represents the definitive version of the Carnegie Supernova Project I (CSP-I) photometry for low-redshift white dwarf SNe and supersedes the light curves published in Papers I and II, as well as those published for a few individual objects by Prieto et al (2007), Phillips et al (2007), Schweizer et al (2008), Stritzinger et al (2010), Taddia et al (2012), Stritzinger et al (2014), and Gall et al (2017)
In this paper we have presented the third and final data release of optical and NIR photometry of the 134 nearby (0.004 z 0.08) white dwarf SNe observed during the CSP-I
Summary
Type Ia supernovae (SNe) are generally agreed to be the result of a carbon–oxygen white dwarf that undergoes a thermonuclear runaway (Hoyle & Fowler 1960) owing to mass accretion in a binary system (Wheeler & Hansen 1971). We provide updated optical and NIR photometry of the 85 previously published low-redshift SNe in the CSP-I sample since, in several cases, we have eliminated bad data points, improved the photometric calibrations, and obtained better host-galaxy reference images This combined data set represents the definitive version of the CSP-I photometry for low-redshift white dwarf SNe and supersedes the light curves published in Papers I and II, as well as those published for a few individual objects by Prieto et al (2007), Phillips et al (2007), Schweizer et al (2008), Stritzinger et al (2010), Taddia et al (2012), Stritzinger et al (2014), and Gall et al (2017). Other useful optical and near-IR observations of Type Ia SNe include the photometry obtained by the Center for Astrophysics group (Hicken et al 2009, 2012; Friedman et al 2015)
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