Where are the prompt emitting regions of long GRBs?

Details Where are the prompt emitting regions of long GRBs? Where are the prompt emitting regions of long GRBs?

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ap%26ss.333...89z&link_type=abstract

Astrophysics and Space Science, Volume 333, Issue 1, pp.89-98

Astronomy and Astrophysics

Astrophysics

Gamma-Ray Burst: General, Methods: Data Analysis

Scientific paper

We have used a simple method to estimate the prompt emission radii of 27 Swift and 37 pre-Swift long gamma-ray bursts with known redshift and jet break time. The prompt γ-rays are found to emit mainly from a beamed jet with dynamic open angle narrower than its geometric open angle, suggesting an obviously dynamic evolution from prompt to follow-up phases for the jetted outflow. Under condition of the external shock scenario, we confirm that long gamma-ray bursts are produced at a larger radius of ˜1016 cm, which puts a strict constraint on the currently theoretical models.

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