The ANDICAM-SOFI Near-infrared and Optical type Ia Supernova (ASNOS) sample: Description and data release
Type Ia supernovae (SNe Ia) provide the robustest means of measuring extragalactic distances. While increasing the number of SNe Ia observed in the optical has received most effort so far, near-infrared (NIR) observations remain scarce despite their advantages. The dust extinction in NIR observations is lower and the behavior of standard candles is more intrinsic and therefore requires little to no empirical corrections. We present the ANDICAM-SOFI Near-infrared and Optical type Ia Supernova (ASNOS) dataset with sample size of 1482 epochs in the BVRIYJH filters from the ANDICAM instrument on the 1.3-meter SMARTS telescope at Cerro Tololo Inter-American Observatory, along with 125 JHK epochs from the SOFI instrument on the 3.58-meter New Technology Telescope on the La Silla Observatory. Additionally, we incorporate optical forced photometry from the Zwicky Transient Facility and the Asteroid Terrestrial-impact Last Alert System. The sample comprises 41 SNe Ia in total, including 29 normal events, eight 1991T-like objects, and four peculiar subtypes, all located at redshifts z <0.085. We provide a detailed overview of the ASNOS sample selection, data reduction, SN photometry, construction of the global and local host-galaxy spectral energy distribution, and SN light-curve fitting using three methods: SALT3-NIR, SNooPy, and BayeSN. A companion paper will present the cosmological analysis.
Authors
- J. P. Anderson (ORCID: https://orcid.org/0000-0003-0227-3451)
- P. J. Pessi (ORCID: https://orcid.org/0000-0002-8041-8559)
- L. Galbany (ORCID: https://orcid.org/0000-0002-1296-6887)
- M. Gromadzki (ORCID: https://orcid.org/0000-0002-1650-1518)
- T. E. Müller-Bravo (ORCID: https://orcid.org/0000-0003-3939-7167)
- Francisco Javier Castander (ORCID: https://orcid.org/0000-0001-7316-4573)
- C. R. Burns (ORCID: https://orcid.org/0000-0003-4625-6629)
- M. Stritzinger (ORCID: https://orcid.org/0000-0002-5571-1833)
- S. Bose (ORCID: https://orcid.org/0000-0003-3529-3854)
- Cristina Jiménez-Palau (ORCID: https://orcid.org/0000-0002-4374-0661)
- Kim Phan (ORCID: https://orcid.org/0000-0001-6383-860X)
- K. C. Chambers
- J. Johansson (ORCID: https://orcid.org/0000-0001-5975-290X)
- Chris Ashall (ORCID: https://orcid.org/0000-0002-5221-7557)
- Camilla T. G. Sørensen
- T. W. Chen (ORCID: https://orcid.org/0000-0002-1066-6098)
Institutions
- University of Hawaiʻi at Mānoa (US)
- University of Hawaii System (US)
- Stockholm University (SE)
- Carnegie Institution for Science (US)
- Aarhus University (DK)
- Trinity College Dublin (IE)
- National Central University (TW)
- Institut d'Estudis Espacials de Catalunya (ES)
- Institute of Space Sciences (ES)
- Institute of Astronomy (RU)
- Astronomical Observatory (RS)
- University of Warsaw (PL)
- Arturo Prat University (CL)
Publication Details
- Journal
- Astronomy and Astrophysics
- Published
- 2026-01-08
- DOI
- https://doi.org/10.1051/0004-6361/202556113
- Primary Topic
- Gamma-ray bursts and supernovae
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Science Foundation
- National Aeronautics and Space Administration
- California Institute of Technology
- Aarhus Universitet
- Aarhus Universitets Forskningsfond
- Generalitat de Catalunya
- Ministerio de Ciencia e Innovación
- Jet Propulsion Laboratory
- Agencia Estatal de Investigación