The Carnegie Supernova Project: The low-redshift survey

Mario Hamuy, Gastón Folatelli, Nidia I. Morrell, Mark M. Phillips, Nicholas B. Suntzeff, S. E. Persson, Miguel Roth, Sergio Gonzalez, Wojtek Krzeminski, Carlos Contreras, Wendy L. Freedman, D. C. Murphy, Barry F. Madore, P. Wyatt, José Maza, Alexei V. Filippenko, L. I. Weidong, P. A. Pinto

Research output: Contribution to journalReview articlepeer-review

230 Scopus citations

Abstract

Supernovae are essential to understanding the chemical evolution of the universe. Type la supernovae also provide the most powerful observational tool currently available for studying the expansion history of the universe and the nature of dark energy. Our basic knowledge of supernovae comes from the study of their photometric and spectroscopic properties. However, the presently available data sets of optical and nearinfrared light curves of supernovae are rather small and/or heterogeneous, and employ photometric systems that are poorly characterized. Similarly, there are relatively few supernovae whose spectral evolution has been well sampled, both in wavelength and phase, with precise spectrophotometric observations. The low-redshift portion of the Carnegie Supernova Project (CSP) seeks to remedy this situation by providing photometry and spectrophotometry of a large sample of supernovae taken on telescope/filter/detector systems that are well understood and well characterized. During a 5 year program that began in 2004 September, we expect to obtain high-precision u'g'r'i'BVYJHK s light curves and optical spectrophotometry for about 250 supernovae of all types. In this paper we provide a detailed description of the CSP survey observing and data reduction methodology. In addition, we present preliminary photometry and spectra obtained for a few representative supernovae during the first observing campaign.

Original languageEnglish (US)
Pages (from-to)2-20
Number of pages19
JournalPublications of the Astronomical Society of the Pacific
Volume118
Issue number839
DOIs
StatePublished - Jan 2006

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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