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Dust Echoes from Gamma-Ray Bursts

Esin, Ann A. and Blandford, Roger (2000) Dust Echoes from Gamma-Ray Bursts. Astrophysical Journal, 534 (2). L151-L154. ISSN 0004-637X. doi:10.1086/312670.

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The deviation from the power-law decline of the optical flux observed in GRB 970228 and GRB 980326 has been used recently to argue in favor of the connection between gamma-ray bursts and supernovae. We consider an alternative explanation for this phenomenon, based on the scattering of a prompt optical burst by 0.1 M☉ dust located beyond its sublimation radius 0.1-1 pc from the burst. In both cases, the optical energy observed at the time of the first detection of the afterglow suffices to produce an echo after ~20-30 days, as observed. Prompt optical monitoring of future bursts and multiband photometry of the afterglows will enable us to test simple models of dust reprocessing quantitatively and to predict source redshift.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Blandford, Roger0000-0002-1854-5506
Additional Information:© 2000 The American Astronomical Society. Received 2000 February 15; accepted 2000 March 24; published 2000 May 2. We thank J. Bloom for helpful comments. This work was supported by NASA grant 5-2837, NSF grant AST 99-00866, and a Chandra Postdoctoral Fellowship grant (PF8-10002) awarded by the Chandra X-Ray Center, which is operated by the SAO for NASA under contract NAS8-39073.
Funding AgencyGrant Number
NSFAST 99-00866
NASA Chandra Postdoctoral FellowshipPF8-10002
Subject Keywords:dust, extinction—gamma rays: bursts
Issue or Number:2
Record Number:CaltechAUTHORS:20190604-101130819
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Official Citation:Ann A. Esin and Roger Blandford 2000 ApJ 534 L151
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96104
Deposited By: Tony Diaz
Deposited On:04 Jun 2019 18:07
Last Modified:16 Nov 2021 17:18

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