Making a Short Gamma-Ray Burst from a Long one: Implications for the Nature of GRB 060614

Details Making a Short Gamma-Ray Burst from a Long one: Implications for the Nature of GRB 060614 Making a Short Gamma-Ray Burst from a Long one: Implications for the Nature of GRB 060614

2006-12-08

arxiv.org/abs/astro-ph/0612238v1

Astrophys.J.655:L25-L28,2007

Astronomy and Astrophysics

Astrophysics

7 pages, 3 figures, to appear in ApJ Letters

Scientific paper

10.1086/511781

The absence of a supernova accompanying the nearby long GRB 060614 poses a great puzzle about the progenitor of this event and challenges the current GRB classification scheme. This burst displays a short-hard emission episode followed by extended soft emission with strong spectral evolution. Noticing that this burst has an isotropic gamma-ray energy only ~8 times that of GRB 050724, a good candidate of merger-type short GRBs, we generate a ``pseudo'' burst that is ~8 times less energetic than GRB 060614 based on the spectral properties of GRB 060614 and the Ep ~ Eiso^{1/2} (Amati) relation. We find that this pseudo-burst would have been detected by BATSE as a marginal short-duration GRB, and would have properties in the Swift BAT and XRT bands similar to GRB 050724. This suggests that GRB 060614 is likely a more intense event in the traditional short-hard GRB category as would be detected by BATSE. Events like GRB 060614 that seem to defy the traditional short vs. long classification of GRBs may require modification of our classification terminology for GRBs. By analogy with supernova classifications, we suggest that GRBs be classified into Type I (typically short and associated with old populations) and Type II (typically long and associated with young populations). We propose that GRB 060614 belongs to Type I, and predict that similar events will be detected in elliptical galaxies.

Affiliated with

Also associated with

No associations

Rating

Making a Short Gamma-Ray Burst from a Long one: Implications for the Nature of GRB 060614 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Making a Short Gamma-Ray Burst from a Long one: Implications for the Nature of GRB 060614, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Making a Short Gamma-Ray Burst from a Long one: Implications for the Nature of GRB 060614 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-440263