Статья

THE CARNEGIE SUPERNOVA PROJECT: LIGHT-CURVE FITTING WITH SNooPy

Chris R. BurnsCarnegie ObservatoriesM. StritzingerDark Cosmology Center, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen Ø, DenmarkM. M. PhillipsCarnegie Institution of Washington, Las Campanas Observatory, Colina El Pino, Casilla 601, ChileShiAnne KattnerAstronomy Department, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USAS. E. PerssonObservatories of the Carnegie Institution for Science, 813 Santa Barbara St., Pasadena CA 91101, USABarry F. MadoreObservatories of the Carnegie Institution for Science, 813 Santa Barbara St., Pasadena CA 91101, USAWendy L. FreedmanObservatories of the Carnegie Institution for Science, 813 Santa Barbara St., Pasadena CA 91101, USALuis BoldtCarnegie Institution of Washington, Las Campanas Observatory, Colina El Pino, Casilla 601, ChileA. CampillayCarnegie Institution of Washington, Las Campanas Observatory, Colina El Pino, Casilla 601, ChileC. ContrerasCentre for Astrophysics & Supercomputing, Swinburne University of Technology, P.O. Box 218, Victoria 3122, AustraliaG. FolatelliCarnegie Institution of Washington, Las Campanas Observatory, Colina El Pino, Casilla 601, ChileS. GonzalezCarnegie Institution of Washington, Las Campanas Observatory, Colina El Pino, Casilla 601, ChileW. KrzemińskiCarnegie Institution of Washington, Las Campanas Observatory, Colina El Pino, Casilla 601, ChileN. MorrellCarnegie Institution of Washington, Las Campanas Observatory, Colina El Pino, Casilla 601, ChileF. SalgadoCarnegie Institution of Washington, Las Campanas Observatory, Colina El Pino, Casilla 601, ChileN. B. SuntzeffGeorge P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, Department of Physics and Astronomy, College Station, TX 77843, USA

2010en

ABI

Аннотация

In providing an independent measure of the expansion history of the Universe, the Carnegie Supernova Project (CSP) has observed 71 high-z Type Ia supernovae (SNe Ia) in the near-infrared bands Y and J. These can be used to construct rest-frame i-band light curves which, when compared to a low-z sample, yield distance moduli that are less sensitive to extinction and/or decline-rate corrections than in the optical. However, working with NIR observed and i-band rest frame photometry presents unique challenges and has necessitated the development of a new set of observational tools in order to reduce and analyze both the low-z and high-z CSP sample. We present in this paper the methods used to generate uBVgriYJH light-curve templates based on a sample of 24 high-quality low-z CSP SNe. We also present two methods for determining the distances to the hosts of SN Ia events. A larger sample of 30 low-z SNe Ia in the Hubble Flow are used to calibrate these methods. We then apply the method and derive distances to seven galaxies that are so nearby that their motions are not dominated by the Hubble flow.

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Идентификаторы

DOI: 10.1088/0004-6256/141/1/19

Цитирования и источники

Цитирований: 5Использованных источников: 0

Показатели — AkademScholar