Extinction properties of the X-ray bright/optically faint afterglow of GRB 020405

Details Extinction properties of the X-ray bright/optically faint afterglow of GRB 020405 Extinction properties of the X-ray bright/optically faint afterglow of GRB 020405

2005-06-17

arxiv.org/abs/astro-ph/0506411v1

Astronomy and Astrophysics

Astrophysics

6 pages, 5 figures, accepted for publication on A&A

Scientific paper

10.1051/0004-6361:20053302

We present an optical-to-X-ray spectral analysis of the afterglow of GRB 020405. The optical spectral energy distribution not corrected for the extragalactic extinction is significantly below the X-ray extrapolation of the single powerlaw spectral model suggested by multiwavelength studies. We investigate whether considerable extinction could explain the observed spectral ``mismatch'' by testing several types of extinction curves. For the first time we test extinction curves computed with time-dependent numerical simulations of dust grains destruction by the burst radiation. We find that an extinction law weakly depen dent on wavelength can reconcile the unabsorbed optical and X-ray data with the expected synchrotron spectrum. A gray extinction law can be provided by a dust grain size distribution biased toward large grains.

Affiliated with

Also associated with

No associations

Rating

Extinction properties of the X-ray bright/optically faint afterglow of GRB 020405 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 Extinction properties of the X-ray bright/optically faint afterglow of GRB 020405, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extinction properties of the X-ray bright/optically faint afterglow of GRB 020405 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-448664