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The Blue Supergiant Progenitor of the Supernova Imposter AT 2019krl

https://doi.org/10.3847/1538-4357/ac09e1

Andrews, Jennifer E.; Jencson, Jacob E.; Van Dyk, Schuyler D.; Smith, Nathan; Neustadt, Jack M.; Sand, David J.; Kreckel, K.; Kochanek, C. S.; Valenti, S.; Strader, Jay; et al (August 2021, The Astrophysical Journal)
null (Ed.)
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Luminous Type II Short-Plateau Supernovae 2006Y, 2006ai, and 2016egz: A Transitional Class from Stripped Massive Red Supergiants

https://doi.org/10.3847/1538-4357/abf6d6

Hiramatsu, Daichi; Howell, D. Andrew; Moriya, Takashi J.; Goldberg, Jared A.; Hosseinzadeh, Griffin; Arcavi, Iair; Anderson, Joseph P.; Gutiérrez, Claudia P.; Burke, Jamison; McCully, Curtis; et al (May 2021, The Astrophysical Journal)
null (Ed.)
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The electron-capture origin of supernova 2018zd

https://doi.org/10.1038/s41550-021-01384-2

Hiramatsu, Daichi; Howell, D. Andrew; Van Dyk, Schuyler D.; Goldberg, Jared A.; Maeda, Keiichi; Moriya, Takashi J.; Tominaga, Nozomu; Nomoto, Ken’ichi; Hosseinzadeh, Griffin; Arcavi, Iair; et al (June 2021, Nature Astronomy)
null (Ed.)
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Supernova 2018cuf: A Type IIP Supernova with a Slow Fall from Plateau

https://doi.org/10.3847/1538-4357/abc417

Dong, Yize; Valenti, S.; Bostroem, K. A.; Sand, D. J.; Andrews, Jennifer E.; Galbany, L.; Jha, Saurabh W.; Eweis, Youssef; Kwok, Lindsey; Hsiao, E. Y.; et al (January 2021, The Astrophysical Journal)
null (Ed.)
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Carnegie Supernova Project-II: Extending the Near-infrared Hubble Diagram

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.; et al (January 2019, Publications of the Astronomical Society of the Pacific)

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.
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