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Corsi, A, Cenko, SB, Kasliwal, MM, Quimby, R, Kulkarni, SR, Frail, DA, Goldstein, AM, Blagorodnova, N, Connaughton, V, Perley, DA, Singer, LP, Copperwheat, CM, Fremling, C, Kupfer, T, Piascik, AS, Steele, IA, Taddia, F, Vedantham, H, Kutyrev, A, Palliyaguru, NT , Roberts, O, Sollerman, J, Troja, E and Veilleux, S (2017) iPTF17cw: An Engine-driven Supernova Candidate Discovered Independent of a Gamma-Ray Trigger. Astrophysical Journal, 847 (1). ISSN 0004-637X
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iPTF17cw An Engine-driven Supernova Candidate Discovered Independent of a Gamma-Ray Trigger.pdf - Accepted Version Download (8MB) | Preview |
Abstract
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 |
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| Uncontrolled Keywords: | 0201 Astronomical And Space Sciences, 0305 Organic Chemistry, 0306 Physical Chemistry (Incl. Structural) |
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics Q Science > QD Chemistry |
| Divisions: | Astrophysics Research Institute |
| Publisher: | American Astronomical Society; IOP Publishing |
| Related URLs: | |
| Date Deposited: | 19 Oct 2017 11:40 |
| Last Modified: | 04 Sep 2021 11:05 |
| DOI or ID number: | 10.3847/1538-4357/aa85e5 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/7393 |
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