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iPTF17cw: An Engine-driven Supernova Candidate Discovered Independent of a Gamma-Ray Trigger

Corsi, A. and Cenko, S. B. and Kasliwal, M. M. and Quimby, R. and Kulkarni, S. R. and Frail, D. A. and Goldstein, A. M. and Blagorodnova, N. and Connaughton, V. and Perley, D. A. and Singer, L. P. and Copperwheat, C. M. and Fremling, C. and Kupfer, T. and Piascik, A. S. and Steele, I. A. and Taddia, F. and Vedantham, H. and Kutyrev, A. and Palliyaguru, N. T. and Roberts, O. and Sollerman, J. and Troja, E. and Veilleux, S. (2017) iPTF17cw: An Engine-driven Supernova Candidate Discovered Independent of a Gamma-Ray Trigger. Astrophysical Journal, 847 (1). Art. No. 54. ISSN 1538-4357.

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We present the discovery, classification, and radio-to-X-ray follow-up observations of iPTF17cw, a broad-lined (BL) type Ic supernova (SN) discovered by the intermediate Palomar Transient Factory (iPTF). Although it is unrelated to the gravitational wave trigger, this SN was discovered as a happy by-product of the extensive observational campaign dedicated to the follow-up of Advanced LIGO event GW 170104. The spectroscopic properties and inferred peak bolometric luminosity of iPTF17cw are most similar to the gamma-ray-burst (GRB)-associated SN, SN 1998bw, while the shape of the r-band light curve is most similar to that of the relativistic SN, SN 2009bb. Karl G. Jansky Very Large Array (VLA) observations of the iPTF17cw field reveal a radio counterpart ≈10 times less luminous than SN 1998bw, and with a peak radio luminosity comparable to that of SN 2006aj/GRB 060218 and SN 2010bh/GRB 100316D. Our radio observations of iPTF17cw imply a relativistically expanding outflow. However, further late-time observations with the VLA in its most extended configuration are needed to confirm fading of the iPTF17cw radio counterpart at all frequencies. X-ray observations carried out with Chandra reveal the presence of an X-ray counterpart with a luminosity similar to that of SN 2010bh/GRB 100316D. Searching the Fermi catalog for possible γ-rays reveals that GRB 161228B is spatially and temporally compatible with iPTF17cw. The similarity to SN 1998bw and SN 2009bb, the radio and X-ray detections, and the potential association with GRB 161228B all point to iPTF17cw being a new candidate member of the rare sample of optically discovered engine-driven BL-Ic SNe associated with relativistic ejecta.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Corsi, A.0000-0001-8104-3536
Cenko, S. B.0000-0003-1673-970X
Kasliwal, M. M.0000-0002-5619-4938
Quimby, R.0000-0001-9171-5236
Kulkarni, S. R.0000-0001-5390-8563
Goldstein, A. M.0000-0002-0587-7042
Blagorodnova, N.0000-0003-0901-1606
Perley, D. A.0000-0001-8472-1996
Singer, L. P.0000-0001-9898-5597
Fremling, C.0000-0002-4223-103X
Kupfer, T.0000-0002-6540-1484
Steele, I. A.0000-0001-8397-5759
Taddia, F.0000-0002-2387-6801
Vedantham, H.0000-0002-0872-181X
Kutyrev, A.0000-0002-2715-8460
Palliyaguru, N. T.0000-0002-4828-0262
Sollerman, J.0000-0003-1546-6615
Troja, E.0000-0002-1869-7817
Veilleux, S.0000-0002-3158-6820
Additional Information:© 2017 The American Astronomical Society. Received 2017 May 15; revised 2017 August 8; accepted 2017 August 9; published 2017 September 20. A.C. and N.T.P. acknowledge support from the National Science Foundation under CAREER Grant No. 1455090. A.C. and N.T.P. also acknowledge partial support from the Swift Cycle 12 GI program (Grant No. NNX17AF93G). Support for this work was in part provided by the National Aeronautics and Space Administration through Chandra Award No. 19500451 issued by the Chandra X-ray Observatory Center, which is operated by the Smithsonian Astrophysical Observatory for and on behalf of the National Aeronautics Space Administration under contract NAS8-03060. This work was also supported by the GROWTH project funded by the National Science Foundation under grant No. 1545949. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. These results made use of the Discovery Channel Telescope at Lowell Observatory. Lowell is a private, non-profit institution dedicated to astrophysical research and public appreciation of astronomy and operates the DCT in partnership with Boston University, the University of Maryland, the University of Toledo, Northern Arizona University, and Yale University. The upgrade of the DeVeny optical spectrograph has been funded by a generous grant from John and Ginger Giovale. This work made use of data supplied by the UK Swift Science Data Centre at the University of Leicester. This work is partially based on observations collected with the Liverpool Telescope, which 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 Astrofisica de Canarias with financial support from the UK Science and Technology Facilities Council. The Pan-STARRS1 Surveys (PS1) have been made possible through contributions of the Institute for Astronomy, the University of Hawaii, the Pan-STARRS Project Office, the Max-Planck Society and its participating institutes, the Max-Planck Institute for Astronomy, Heidelberg and the Max-Planck Institute for Extraterrestrial Physics, Garching, The Johns Hopkins University, Durham University, the University of Edinburgh, Queen's University Belfast, the Harvard-Smithsonian Center for Astrophysics, the Las Cumbres Observatory Global Telescope Network Incorporated, the National Central University of Taiwan, the Space Telescope Science Institute, the National Aeronautics and Space Administration under grant No. NNX08AR22G issued through the Planetary Science Division of the NASA Science Mission Directorate, the National Science Foundation under grant No. AST-1238877, the University of Maryland, and Eotvos Lorand University (ELTE).
Funding AgencyGrant Number
Science and Technology Facilities Council (STFC)UNSPECIFIED
Subject Keywords:gamma-ray burst: individual (GRB 161228B) ; gravitational waves; supernovae: individual (iPTF17cw)
Issue or Number:1
Record Number:CaltechAUTHORS:20170921-111939822
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Official Citation:A. Corsi et al 2017 ApJ 847 54
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:81682
Deposited By: Tony Diaz
Deposited On:21 Sep 2017 19:54
Last Modified:22 Nov 2019 00:32

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