GRB990123: multiwavelength afterglow study

Details GRB990123: multiwavelength afterglow study GRB990123: multiwavelength afterglow study

2005-05-02

arxiv.org/abs/astro-ph/0505026v2

Nuovo Cim.C28:525-528,2005

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, 1 table. Poster presented at the 4th Workshop Gamma-Ray Bursts in the Afterglow Era, Rome,18-22 October 20

Scientific paper

10.1393/ncc/i2005-10098-0

We report on the BeppoSAX and multiwavelength data analysis of the afterglow of Gamma-Ray Burst (GRB) 990123. Mainly due to its exceptional brightness, this is the only source for which the Wide Field Cameras have allowed an early detection of the X-ray afterglow between about 20 and 60 min after the GRB trigger. Besides, again for the first time, high-energy emission from the afterglow was detected up to 60 keV. The backwards extrapolation of the afterglow decay smoothly reconnects with the late GRB emission, thus indicating that both are consistent with being produced by the same phenomenon. For the X-ray afterglow we found a power-law decay with index alpha_X = 1.46 +/- 0.04; the spectrum has a power-law shape with photon index Gamma about 2. An extensive set of multiwavelength observations on the afterglow, collected from the literature and made during the BeppoSAX pointing, allowed constructing a Spectral Flux Distribution. We performed an analysis of the GRB afterglow emission in the context of the "fireball" model.

Affiliated with

Also associated with

No associations

Rating

GRB990123: multiwavelength afterglow study 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 GRB990123: multiwavelength afterglow study, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and GRB990123: multiwavelength afterglow study will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-480018