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Carnegie Supernova Project-II: Extending the Near-Infrared Hubble Diagram for Type Ia Supernovae to zsim0.1

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arxiv 1810.09252 v1 pith:AAMH74LO submitted 2018-10-18 astro-ph.HE

Carnegie Supernova Project-II: Extending the Near-Infrared Hubble Diagram for Type Ia Supernovae to zsim0.1

M. M. Phillips , Carlos Contreras , E. Y. Hsiao , Nidia Morrell , Christopher R. Burns , Maximilian Stritzinger , C. Ashall , Wendy L. Freedman
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P. Hoeflich S. E. Persson Anthony L. Piro Nicholas B. Suntzeff Syed A. Uddin Jorge Anais E. Baron Luis Busta Abdo Campillay Sergio Castell\'on Carlos Corco T. Diamond Christa Gall Consuelo Gonzalez Simon Holmbo Kevin Krisciunas Miguel Roth Jacqueline Ser\'on F. Taddia Sim\'on Torres J. P. Anderson C. Baltay Gast\'on Folatelli L. Galbany A. Goobar Ellie Hadjiyska Mario Hamuy Mansi Kasliwal C. Lidman Peter E. Nugent S. Perlmutter David Rabinowitz Stuart D. Ryder Brian P. Schmidt B. J. Shappee Emma S. Walker
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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 $\sim100$ Type Ia supernovae located in the smooth Hubble flow ($0.03 \lesssim z \lesssim 0.10$). Light curves were also obtained of a "Physics" sample composed of 90 nearby Type Ia supernovae at $z \leq 0.04$ selected for near-infrared spectroscopic time-series 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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