AN ANALYSIS of CHANDRA DEEP FOLLOW-UP GAMMA-RAY BURSTS: IMPLICATIONS for OFF-AXIS JETS

Bin Bin Zhang, Hendrik Van Eerten, David N. Burrows, Geoffrey Scott Ryan, Philip A. Evans, Judith L. Racusin, Eleonora Troja, Andrew Macfadyen

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

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.

Original languageEnglish (US)
Article number15
JournalAstrophysical Journal
Volume806
Issue number1
DOIs
StatePublished - Jun 10 2015

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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