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. (27th November 2018)

• Record Type: Journal Article
• Authors: Phillips, M. M.; Contreras, Carlos; Hsiao, E. Y.; Morrell, Nidia; Burns, Christopher R.; Stritzinger, Maximilian; Ashall, C.; Freedman, Wendy L.; Hoeflich, P.; Persson, S. E.; 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, J. P.; 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, B. J.; Walker, Emma S.;
• Is Part Of: Publications of the Astronomical Society of the Pacific. Volume 131:Number 995(2019)
• Publication Date: 2018-11-27
• Subjects: cosmology: observations -- galaxies: distances and redshifts -- (stars:) supernovae: general; Astronomy -- Periodicals; Astronomy; Periodicals; Periodicals; 520.5
• DOI: 10.1088/1538-3873/aae8bd
• Languages: English
• ISSNs: 0004-6280

Abstract

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 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.