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Author Corsi, A. ♦ Palliyaguru, N. T. ♦ Cenko, S. B. ♦ Singer, L. P. ♦ Kutyrev, A. ♦ Kasliwal, M. M. ♦ Kulkarni, S. R. ♦ Blagorodnova, N. ♦ Kupfer, T. ♦ Vedantham, H. ♦ Quimby, R. ♦ Frail, D. A. ♦ Goldstein, A. M. ♦ Connaughton, V. ♦ Perley, D. A. ♦ Copperwheat, C. M. ♦ Piascik, A. S. ♦ Steele, I. A. ♦ Fremling, C. ♦ Taddia, F.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ♦ BOLOMETERS ♦ BY-PRODUCTS ♦ CLASSIFICATION ♦ CONFIGURATION ♦ COSMIC GAMMA BURSTS ♦ GAMMA RADIATION ♦ GRAVITATIONAL WAVES ♦ LUMINOSITY ♦ RELATIVISTIC RANGE ♦ TYPE I SUPERNOVAE ♦ VISIBLE RADIATION ♦ X RADIATION ♦ X-RAY DETECTION
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.
ISSN 0004637X
Educational Use Research
Learning Resource Type Article
Publisher Date 2017-09-20
Publisher Place United States
Journal Astrophysical Journal
Volume Number 847
Issue Number 1


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