Extensive multiband study of the X-ray rich GRB 050408. A likely off-axis event with an intense energy injection

Details Extensive multiband study of the X-ray rich GRB 050408. A likely off-axis event with an intense energy injection Extensive multiband study of the X-ray rich GRB 050408. A likely off-axis event with an intense energy injection

2006-12-19

arxiv.org/abs/astro-ph/0612545v1

Astron.Astrophys. 462 (2007) L57-L60

Astronomy and Astrophysics

Astrophysics

9 pages, 4 figures, Accepted for publication in A&A Letters

Scientific paper

10.1051/0004-6361:20066660

Aims. Understand the shape and implications of the multiband light curve of GRB 050408, an X-ray rich (XRR) burst. Methods. We present a multiband optical light curve, covering the time from the onset of the gamma-ray event to several months after, when we only detect the host galaxy. Together with X-ray, millimetre and radio observations we compile what, to our knowledge, is the most complete multiband coverage of an XRR burst afterglow to date. Results. The optical and X-ray light curve is characterised by an early flattening and an intense bump peaking around 6 days after the burst onset. We explain the former by an off-axis viewed jet, in agreement with the predictions made for XRR by some models, and the latter with an energy injection equivalent in intensity to the initial shock. The analysis of the spectral flux distribution reveals an extinction compatible with a low chemical enrichment surrounding the burst. Together with the detection of an underlying starburst host galaxy we can strengthen the link between XRR and classical long-duration bursts.

Affiliated with

Also associated with

No associations

Rating

Extensive multiband study of the X-ray rich GRB 050408. A likely off-axis event with an intense energy injection 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 Extensive multiband study of the X-ray rich GRB 050408. A likely off-axis event with an intense energy injection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extensive multiband study of the X-ray rich GRB 050408. A likely off-axis event with an intense energy injection will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-314486