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 journalArticle

    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

    Fingerprint

    gamma ray bursts
    light curve
    edge effect
    Monte Carlo method
    expansion
    simulation
    effect

    Keywords

    • gamma-ray burst: general
    • methods: numerical

    ASJC Scopus subject areas

    • Space and Planetary Science
    • Astronomy and Astrophysics

    Cite this

    Zhang, B. B., Eerten, H. V., Burrows, D. N., Ryan, G. S., Evans, P. A., Racusin, J. L., ... Macfadyen, A. (2015). AN ANALYSIS of CHANDRA DEEP FOLLOW-UP GAMMA-RAY BURSTS: IMPLICATIONS for OFF-AXIS JETS. Astrophysical Journal, 806(1), [15]. https://doi.org/10.1088/0004-637X/806/1/15

    AN ANALYSIS of CHANDRA DEEP FOLLOW-UP GAMMA-RAY BURSTS : IMPLICATIONS for OFF-AXIS JETS. / Zhang, Bin Bin; Eerten, Hendrik Van; Burrows, David N.; Ryan, Geoffrey Scott; Evans, Philip A.; Racusin, Judith L.; Troja, Eleonora; Macfadyen, Andrew.

    In: Astrophysical Journal, Vol. 806, No. 1, 15, 10.06.2015.

    Research output: Contribution to journalArticle

    Zhang, BB, Eerten, HV, Burrows, DN, Ryan, GS, Evans, PA, Racusin, JL, Troja, E & Macfadyen, A 2015, 'AN ANALYSIS of CHANDRA DEEP FOLLOW-UP GAMMA-RAY BURSTS: IMPLICATIONS for OFF-AXIS JETS', Astrophysical Journal, vol. 806, no. 1, 15. https://doi.org/10.1088/0004-637X/806/1/15
    Zhang, Bin Bin ; Eerten, Hendrik Van ; Burrows, David N. ; Ryan, Geoffrey Scott ; Evans, Philip A. ; Racusin, Judith L. ; Troja, Eleonora ; Macfadyen, Andrew. / AN ANALYSIS of CHANDRA DEEP FOLLOW-UP GAMMA-RAY BURSTS : IMPLICATIONS for OFF-AXIS JETS. In: Astrophysical Journal. 2015 ; Vol. 806, No. 1.
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