A Caltech Library Service

SN2020bvc: a Broad-lined Type Ic Supernova with a Double-peaked Optical Light Curve and a Luminous X-ray and Radio Counterpart

Ho, Anna Y. Q. and Kulkarni, S. R. and Perley, Daniel A. and Cenko, S. Bradley and Corsi, Alessandra and Schulze, Steve and Lunnan, Ragnhild and Sollerman, Jesper and Gal-Yam, Avishay and Anand, Shreya and Barbarino, Cristina and Bellm, Eric C. and Bruch, Rachel J. and Burns, Eric and De, Kishalay and Dekany, Richard and Delacroix, Alexandre and Duev, Dmitry A. and Fremling, Christoffer and Goldstein, Daniel A. and Golkhou, V. Zach and Graham, Matthew J. and Hale, David and Kasliwal, Mansi M. and Kupfer, Thomas and Laher, Russ R. and Martikainen, Julia and Masci, Frank J. and Neill, James D. and Rusholme, Ben and Shupe, David L. and Soumagnac, Maayane T. and Strotjohann, Nora L. and Taggart, Kirsty and Tartaglia, Leonardo and Yan, Lin and Zolkower, Jeffry (2020) SN2020bvc: a Broad-lined Type Ic Supernova with a Double-peaked Optical Light Curve and a Luminous X-ray and Radio Counterpart. . (Unpublished)

[img] PDF - Submitted Version
See Usage Policy.


Use this Persistent URL to link to this item:


We present optical, radio, and X-ray observations of SN2020bvc (=ASASSN20bs; ZTF20aalxlis), a nearby (z = 0.0252; d = 114 Mpc) broad-lined (BL) Type Ic supernova (SN). Our observations show that SN2020bvc shares several properties in common with the Ic-BL SN2006aj, which was associated with the low-luminosity gamma-ray burst (LLGRB) 060218. First, the 10 GHz radio light curve is on the faint end of LLGRB-SNe (L_(radio) ≈ 10³⁷ erg/s): we model our VLA observations (spanning 13-43 d) as synchrotron emission from a mildly relativistic (v≳0.3c) forward shock. Second, with Swift and Chandra we detect X-ray emission (L_X ≈ 10⁴¹ erg/s) that is not naturally explained as inverse Compton emission or as part of the same synchrotron spectrum as the radio emission. Third, high-cadence (6×/night) data from the Zwicky Transient Facility (ZTF) shows a double-peaked optical light curve, the first peak from shock-cooling emission from extended low-mass material (mass M < 10⁻² M_⊙ at radius R > 10¹² cm) and the second peak from the radioactive decay of Ni-56. SN2020bvc is the first confirmed double-peaked Ic-BL SN discovered without a GRB trigger, and shows X-ray and radio emission similar to LLGRB-SNe: this is consistent with models in which the same mechanism produces both the LLGRB and the shock-cooling emission. For four of the five other nearby (z ≲ 0.05) Ic-BL SNe with ZTF high-cadence data, we rule out a first peak like that seen in SN2006aj and SN2020bvc, i.e. that lasts ≈ 1d and reaches a peak luminosity M ≈ −18. X-ray and radio follow-up observations of future such events will establish whether double-peaked optical light curves are indeed predictive of LLGRB-like X-ray and radio emission.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Ho, Anna Y. Q.0000-0002-9017-3567
Kulkarni, S. R.0000-0001-5390-8563
Perley, Daniel A.0000-0001-8472-1996
Cenko, S. Bradley0000-0003-1673-970X
Corsi, Alessandra0000-0001-8104-3536
Schulze, Steve0000-0001-6797-1889
Lunnan, Ragnhild0000-0001-9454-4639
Sollerman, Jesper0000-0003-1546-6615
Gal-Yam, Avishay0000-0002-3653-5598
Barbarino, Cristina0000-0002-3821-6144
Bellm, Eric C.0000-0001-8018-5348
De, Kishalay0000-0002-8989-0542
Dekany, Richard0000-0002-5884-7867
Duev, Dmitry A.0000-0001-5060-8733
Fremling, Christoffer0000-0002-4223-103X
Goldstein, Daniel A.0000-0003-3461-8661
Golkhou, V. Zach0000-0001-8205-2506
Graham, Matthew J.0000-0002-3168-0139
Kasliwal, Mansi M.0000-0002-5619-4938
Kupfer, Thomas0000-0002-6540-1484
Laher, Russ R.0000-0003-2451-5482
Masci, Frank J.0000-0002-8532-9395
Neill, James D.0000-0002-0466-1119
Rusholme, Ben0000-0001-7648-4142
Shupe, David L.0000-0003-4401-0430
Soumagnac, Maayane T.0000-0001-6753-1488
Strotjohann, Nora L.0000-0002-4667-6730
Taggart, Kirsty0000-0002-5748-4558
Tartaglia, Leonardo0000-0003-3433-1492
Yan, Lin0000-0003-1710-9339
Additional Information:A.Y.Q.H. was supported by the GROWTH project funded by the National Science Foundation under PIRE Grant No. 1545949, as well as by the Heising-Simons Foundation. She would like to thank A. Jaodand and M. Brightman for their assistance with the Chandra data reduction, Y. Yao for her assistance with the shock-cooling modeling, D. Dong for his help with imaging VLA data, and E. Ofek for his helpful comments on the manuscript. R.L. is supported by a Marie Skłodowska-Curie Individual Fellowship within the Horizon 2020 European Union (EU) Framework Programme for Research and Innovation (H2020-MSCA-IF-2017-794467). AGYs research is supported by the EU via ERC grant No. 725161, the ISF GW excellence center, an IMOS space infrastructure grant and BSF/Transformative and GIF grants, as well as The Benoziyo Endowment Fund for the Advancement of Science, the Deloro Institute for Advanced Research in Space and Optics, The Veronika A. Rabl Physics Discretionary Fund, Paul and Tina Gardner, Yeda-Sela and the WIS-CIT joint research grant; AGY is the recipient of the Helen and Martin Kimmel Award for Innovative Investigation. C. F. gratefully acknowledges support of his research by the Heising-Simons Foundation (#2018-0907). Based on observations obtained with the Samuel Oschin Telescope 48-inch and the 60-inch Telescope at the Palomar Observatory as part of the Zwicky Transient Facility project. ZTF is supported by the National Science Foundation under Grant No. AST-1440341 and a collaboration including Caltech, IPAC, the Weizmann Institute for Science, the Oskar Klein Center at Stockholm University, the University of Maryland, the University of Washington, Deutsches Elektronen-Synchrotron and Humboldt University, Los Alamos National Laboratories, the TANGO Consortium of Taiwan, the University of Wisconsin at Milwaukee, and Lawrence Berkeley National Laboratories. Operations are conducted by COO, IPAC, and UW. The scientific results reported in this article are based on observations made by the Chandra X-ray Observatory. This research has made use of software provided by the Chandra X-ray Center (CXC) in the application packages CIAO and Sherpa. This work made use of data supplied by the UK Swift Science Data Centre at the University of Leicester. SED Machine is based upon work supported by the National Science Foundation under Grant No. 1106171. The Submillimeter Array is a joint project between the Smithsonian Astrophysical Observatory and the Academia Sinica Institute of Astronomy and Astrophysics and is funded by the Smithsonian Institution and the Academia Sinica. The Liverpool Telescope is operated on the island of La Palma by Liverpool John Moores University in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias with financial support from the UK Science and Technology Facilities Council. Based on observations made with the Nordic Optical Telescope, operated by the Nordic Optical Telescope Scientific Association at the Observatorio del Roque de los Muchachos, La Palma, Spain, of the Instituto de Astrofisica de Canarias. This work made use of the data products generated by the NYU SN group, and released under DOI:10.5281/zenodo.58767, available at Funding for the Sloan Digital Sky Survey IV has been provided by the Alfred P. Sloan Foundation, the U.S. Department of Energy Office of Science, and the Participating Institutions. SDSS-IV acknowledges support and resources from the Center for High-Performance Computing at the University of Utah. The SDSS web site is SDSS-IV is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS Collaboration including the Brazilian Participation Group, the Carnegie Institution for Science, Carnegie Mellon University, the Chilean Participation Group, the French Participation Group, Harvard-Smithsonian Center for Astrophysics, Instituto de Astrofísica de Canarias, The Johns Hopkins University, Kavli Institute for the Physics and Mathematics of the Universe (IPMU) / University of Tokyo, the Korean Participation Group, Lawrence Berkeley National Laboratory, Leibniz Institut für Astrophysik Potsdam (AIP), Max-Planck-Institut für Astronomie (MPIA Heidelberg), Max-Planck-Institut für Astrophysik (MPA Garching), Max-Planck-Institut für Extraterrestrische Physik (MPE), National Astronomical Observatories of China, New Mexico State University, New York University, University of Notre Dame, Observatário Nacional / MCTI, The Ohio State University, Pennsylvania State University, Shanghai Astronomical Observatory, United Kingdom Participation Group, Universidad Nacional Autónoma de México, University of Arizona, University of Colorado Boulder, University of Oxford, University of Portsmouth, University of Utah, University of Virginia, University of Washington, University of Wisconsin, Vanderbilt University, and Yale University. Facilities: CXO, Hale, Swift, EVLA, VLA, Liverpool:2m, PO:1.2m, PO:1.5m, NOT Software: CASA (McMullin et al. 2007), astropy (Astropy Collaboration et al. 2013, 2018), matplotlib (Hunter 2007), scipy (Virtanen et al. 2020), Sherpa (Freeman et al. 2011),
Group:Astronomy Department, Infrared Processing and Analysis Center (IPAC), Zwicky Transient Facility
Funding AgencyGrant Number
Heising-Simons Foundation2018-0907
Marie Curie FellowshipH2020-MSCA-IF-2017- 794467
European Research Council (ERC)725161
Israel Science FoundationUNSPECIFIED
Israel Ministry of ScienceUNSPECIFIED
Binational Science Foundation (USA-Israel)UNSPECIFIED
German-Israeli Foundation for Research and DevelopmentUNSPECIFIED
Benoziyo Endowment FundUNSPECIFIED
Deloro Institute for Advanced Research in Space and OpticsUNSPECIFIED
Veronika A. Rabl Physics Discretionary FundUNSPECIFIED
Paul and Tina Gardner FundUNSPECIFIED
Weizmann Institute of ScienceUNSPECIFIED
Helen and Martin Kimmel AwardUNSPECIFIED
ZTF partner institutionsUNSPECIFIED
Smithsonian Astrophysical ObservatoryUNSPECIFIED
Academia SinicaUNSPECIFIED
Science and Technology Facilities Council (STFC)UNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Participating InstitutionsUNSPECIFIED
Subject Keywords:supernovae: general, supernovae:individual (SN2020bvc) - surveys
Record Number:CaltechAUTHORS:20200604-151430667
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103708
Deposited By: George Porter
Deposited On:05 Jun 2020 17:20
Last Modified:05 Jun 2020 17:20

Repository Staff Only: item control page