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Hubble Space Telescope Observations of the Afterglow, Supernova, and Host Galaxy Associated with the Extremely Bright GRB 130427A

Levan, A. J. and Tanvir, N. R. and Fruchter, A. S. and Hjorth, J. and Pian, E. and Mazzali, P. and Hounsell, R. A. and Perley, D. A. and Cano, Z. and Graham, J. and Cenko, S. B. and Fynbo, J. P. U. and Kouveliotou, C. and Pe'er, A. and Misra, K. and Wiersema, K. (2014) Hubble Space Telescope Observations of the Afterglow, Supernova, and Host Galaxy Associated with the Extremely Bright GRB 130427A. Astrophysical Journal, 792 (2). Art. No. 115. ISSN 0004-637X. http://resolver.caltech.edu/CaltechAUTHORS:20140925-115944467

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Abstract

We present Hubble Space Telescope (HST) observations of the exceptionally bright and luminous Swift gamma-ray burst (GRB), GRB 130427A. At z = 0.34, this burst affords an excellent opportunity to study the supernova (SN) and host galaxy associated with an intrinsically extremely luminous burst (E_(iso) > 10^(54) erg): more luminous than any previous GRB with a spectroscopically associated SN. We use the combination of the image quality, UV capability, and invariant point-spread function of HST to provide the best possible separation of the afterglow, host, and SN contributions to the observed light ~17 rest-frame days after the burst, utilizing a host subtraction spectrum obtained one year later. Advanced Camera for Surveys grism observations show that the associated SN, SN 2013cq, has an overall spectral shape and luminosity similar to SN 1998bw (with a photospheric velocity, v_(ph) ~ 15,000 km s^(–1)). The positions of the bluer features are better matched by the higher velocity SN 2010bh (v_(ph) ~ 30,000 km s^(–1)), but this SN is significantly fainter and fails to reproduce the overall spectral shape, perhaps indicative of velocity structure in the ejecta. We find that the burst originated ~4 kpc from the nucleus of a moderately star forming (1 M_☉ yr^(–1)), possibly interacting disk galaxy. The absolute magnitude, physical size, and morphology of this galaxy, as well as the location of the GRB within it, are also strikingly similar to those of GRB 980425/SN 1998bw. The similarity of the SNe and environment from both the most luminous and least luminous GRBs suggests that broadly similar progenitor stars can create GRBs across six orders of magnitude in isotropic energy.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://arxiv.org/abs/1307.5338arXivDiscussion Paper
http://iopscience.iop.org/0004-637X/792/2/115PublisherArticle
http://dx.doi.org/10.1088/0004-637X/792/2/115DOIArticle
ORCID:
AuthorORCID
Perley, D. A.0000-0001-8472-1996
Cenko, S. B.0000-0003-1673-970X
Additional Information:© 2014 American Astronomical Society. Received 2013 July 19; accepted 2014 June 18; published 2014 August 22. We thank Matt Mountain and the STScI staff for rapidly scheduling our observations. A.J.L. thanks the Leverhulme Trust. A.J.L., N.R.T., and K.W. are supported by STFC. The Dark Cosmology Centre is funded by the DNRF. Based on observations made with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. These observations are associated with program Nos. 13230, 13110, and 13117.
Funders:
Funding AgencyGrant Number
Science and Technology Facilities Council (STFC)UNSPECIFIED
Danish National Research FoundationUNSPECIFIED
NASANAS 5-26555
Subject Keywords: gamma-ray burst: general; supernovae: general
Record Number:CaltechAUTHORS:20140925-115944467
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20140925-115944467
Official Citation:Hubble Space Telescope Observations of the Afterglow, Supernova, and Host Galaxy Associated with the Extremely Bright GRB 130427A
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50033
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:25 Sep 2014 21:31
Last Modified:27 Oct 2017 23:52

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