Carnegie Supernova Project-II: Extending the Near-infrared Hubble Diagram for Type Ia Supernovae to z ∼ 0.1∗ ∗ This paper includes data gathered with the 6.5 meter Magellan telescopes at Las Campanas Observatory, Chile.
- Phillips, MM;
- Contreras, Carlos;
- Hsiao, EY;
- Morrell, Nidia;
- Burns, Christopher R;
- Stritzinger, Maximilian;
- Ashall, C;
- Freedman, Wendy L;
- Hoeflich, P;
- Persson, SE;
- Piro, Anthony L;
- Suntzeff, Nicholas B;
- Uddin, Syed A;
- Anais, Jorge;
- Baron, E;
- Busta, Luis;
- Campillay, Abdo;
- Castellón, Sergio;
- Corco, Carlos;
- Diamond, T;
- Gall, Christa;
- Gonzalez, Consuelo;
- Holmbo, Simon;
- Krisciunas, Kevin;
- Roth, Miguel;
- Serón, Jacqueline;
- Taddia, F;
- Torres, Simón;
- Anderson, JP;
- Baltay, C;
- Folatelli, Gastón;
- Galbany, L;
- Goobar, A;
- Hadjiyska, Ellie;
- Hamuy, Mario;
- Kasliwal, Mansi;
- Lidman, C;
- Nugent, Peter E;
- Perlmutter, S;
- Rabinowitz, David;
- Ryder, Stuart D;
- Schmidt, Brian P;
- Shappee, BJ;
- Walker, Emma S
- et al.
Abstract
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 TypeIa 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 TypeIa 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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