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Open Access Publications from the University of California

Carnegie supernova project-II: Extending the near-infrared hubble diagram for type ia supernovae to z∼0.1

  • Author(s): Phillips, MM;
  • Contreras, C;
  • Hsiao, EY;
  • Morrell, N;
  • Burns, CR;
  • Stritzinger, M;
  • Ashall, C;
  • Freedman, WL;
  • Hoeflich, P;
  • Persson, SE;
  • Piro, AL;
  • Suntzeff, NB;
  • Uddin, SA;
  • Anais, J;
  • Baron, E;
  • Busta, L;
  • Campillay, A;
  • Castellón, S;
  • Corco, C;
  • Diamond, T;
  • Gall, C;
  • Gonzalez, C;
  • Holmbo, S;
  • Krisciunas, K;
  • Roth, M;
  • Serón, J;
  • Taddia, F;
  • Torres, S;
  • Anderson, JP;
  • Baltay, C;
  • Folatelli, G;
  • Galbany, L;
  • Goobar, A;
  • Hadjiyska, E;
  • Hamuy, M;
  • Kasliwal, M;
  • Lidman, C;
  • Nugent, PE;
  • Perlmutter, S;
  • Rabinowitz, D;
  • Ryder, SD;
  • Schmidt, BP;
  • Shappee, BJ;
  • Walker, ES
  • et al.

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The Carnegie Supernova Project-II (CSP-II) was an NSF-funded, four-year program to obtain optical and near-infrared observations of a “Cosmology” sample of ∼100 TypeIa supernovae located in the smooth Hubble flow (0.03<z<0.10). Light curves were also obtained of a “Physics” sample composed of 90 nearby TypeIa supernovae at z≤0.04 selected for near-infrared spectroscopic timeseries observations. The primary emphasis of the CSP-II is to use the combination of optical and near-infrared photometry to achieve a distance precision of better than 5%. In this paper, details of the supernova sample, the observational strategy, and the characteristics of the photometric data are provided. In a companion paper, the near-infrared spectroscopy component of the project is presented.

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