Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 512, Issue 3, Pages 3195-3214Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stac723
Keywords
supernovae: general; galaxies: distances and redshifts
Categories
Funding
- NSF
- Richard and Rhoda Goldman Fund
- TABASGO Foundation
- Christopher R. Redlich Fund
- UC Berkeley Miller Institute for Basic Research in Science
- National Natural Science Foundation of China (NSFC) [11673006]
- Guangxi Science Foundation [2016GXNSFFA380006, 2017AD22006]
- NASA
- NASA [NNX08AR22G]
- National Science Foundation [AST1238877]
- Alfred P. Sloan Foundation
- U.S. Department of Energy
- Japanese Monbukagakusho
- Max Planck Society
- University of Chicago
- Institute for Advanced Study
- Japan Participation Group
- Johns Hopkins University
- Los Alamos National Laboratory
- Max-Planck-Institute for Astronomy (MPIA)
- Max-Planck-Institute for Astrophysics (MPA)
- New Mexico State University
- University of Pittsburgh
- Princeton University
- United States Naval Observatory
- University of Washington
- Fermilab
- NASA [NNX08AR22G, 95405] Funding Source: Federal RePORTER
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This paper presents the BVRI and unfiltered light curves of 70 stripped-envelope supernovae observed from 2003 to 2020. The study finds that SNe Ic have lower ejecta masses and velocities but higher Ni-56 masses compared to SNe Ib and IIb.
We present BVRI and unfiltered (Clear) light curves of 70 stripped-envelope supernovae (SESNe), observed between 2003 and 2020, from the Lick Observatory Supernova Search follow-up program. Our SESN sample consists of 19 spectroscopically normal SNe Ib, 2 peculiar SNe Ib, six SNe Ibn, 14 normal SNe Ic, 1 peculiar SN Ic, 10 SNe Ic-BL, 15 SNe IIb, 1 ambiguous SN IIb/Ib/c, and 2 superluminous SNe. Our follow-up photometry has (on a per-SN basis) a mean coverage of 81 photometric points (median of 58 points) and a mean cadence of 3.6 d (median of 1.2 d). From our full sample, a subset of 38 SNe have pre-maximum coverage in at least one passband, allowing for the peak brightness of each SN in this subset to be quantitatively determined. We describe our data collection and processing techniques, with emphasis toward our automated photometry pipeline, from which we derive publicly available data products to enable and encourage further study by the community. Using these data products, we derive host-galaxy extinction values through the empirical colour evolution relationship and, for the first time, produce accurate rise-time measurements for a large sample of SESNe in both optical and infrared passbands. By modelling multiband light curves, we find that SNe Ic tend to have lower ejecta masses and lower ejecta velocities than SNe Ib and IIb, but higher Ni-56 masses.
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