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|Title:||An analysis of Chandra deep follow-up gamma-ray bursts: implications for off-axis jets|
van Eerten, Hendrik
Burrows, David N.
Ryan, Geoffrey Scott
Evans, Philip A.
Racusin, Judith L.
|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.|
|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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|apj_806_1_15.pdf||Published (publisher PDF)||1.01 MB||Adobe PDF||View/Open|
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