Carnegie Supernova Project-II: Extending the Near-infrared Hubble Diagram for Type Ia Supernovae to z ∼ 0.1

HSIAO, E. Y.; STRITZINGER, MAXIMILIAN; HOEFLICH, P.; SUNTZEFF, NICHOLAS B.; BARON, E.; CASTELLÓN, SERGIO; GALL, CHRISTA; KRISCIUNAS, KEVIN; TADDIA, F.; BALTAY, C.; GOOBAR, A.; KASLIWAL, MANSI; PERLMUTTER, S.; SCHMIDT, BRIAN P.; PHILLIPS, M. M.; MORRELL, NIDIA; ASHALL, C.; PERSSON, S. E.; CONTRERAS, CARLOS; UDDIN, SYED A.; BURNS, CHRISTOPHER R.; BUSTA, LUIS; FREEDMAN, WENDY L.; CORCO, CARLOS; PIRO, ANTHONY L.; GONZALEZ, CONSUELO; ANAIS, JORGE; ROTH, MIGUEL; CAMPILLAY, ABDO; TORRES, SIMÓN; DIAMOND, T.; FOLATELLI, GASTÓN; HOLMBO, SIMON; HADJIYSKA, ELLIE; SERÓN, JACQUELINE; LIDMAN, C.; ANDERSON, J. P.; RABINOWITZ, DAVID; GALBANY, L.; SHAPPEE, B. J.; HAMUY, MARIO; NUGENT, PETER E.; RYDER, STUART D.; WALKER, EMMA S.

PUBL. ASTRON. SOC. PAC.

PASP

Año: 2019 vol. 131

0004-6280

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.