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Title: An analysis of Chandra deep follow-up gamma-ray bursts: implications for off-axis jets
Authors: Zhang, Bin-Bin
van Eerten, Hendrik
Burrows, David N.
Ryan, Geoffrey Scott
Evans, Philip A.
Racusin, Judith L.
Troja, Eleonora
MacFadyen, Andrew
First Published: 3-Jun-2015
Publisher: American Astronomical Society / IOP Publishing
Citation: Astrophysical Journal, 2015, 806 (1)
Abstract: We present a sample of 27 gamma-ray bursts (GRBs) with detailed Swift light curves supplemented by late-time Chandra observations. To answer the missing jet-break problem in general, we develop a numerical-simulation-based model that can be directly fit to the data using Monte Carlo methods. Our numerical model takes into account all the factors that can shape a jet break: (i) lateral expansion, (ii) edge effects, and (iii) off-axis effects. Our results provide improved fits to the light curves and constraints on physical parameters. More importantly, our results suggest that off-axis effects are important and must be included in interpretations of GRB jet breaks.
DOI Link: 10.1088/0004-637X/806/1/15
ISSN: 0004-637X
eISSN: 1538-4357
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: © 2015. The American Astronomical Society. All rights reserved. Deposited with reference to the publisher’s open access archiving policy.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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