2005A&A...441...83S


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.15CEST22:57:04

2005A&A...441...83S - Astronomy and Astrophysics, volume 441, 83 (2005/10-1)

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

STRATTA G., PERNA R., LAZZATI D., FIORE F., ANTONELLI L.A. and CONCIATORE M.L.

Abstract (from CDS):

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 dependent 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.

Abstract Copyright:

Journal keyword(s): gamma-rays: bursts - ISM: dust, extinction

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9483 1
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5703 1
3 GRB 980329 gB 07 02 41 +38 50.7           ~ 264 1
4 SN 2003lw SN* 08 02 30.1 -39 51 03       20.23   SNIc: 508 0
5 SN 2002lt SN* 08 08 59.858 +06 43 37.52           SNIc: 338 1
6 SN 2003dh SN* 10 44 50.030 +21 31 18.15     16.2     SNIcpec 1118 2
7 GRB 971214 gB 11 56 26.4 +65 12 01           ~ 434 1
8 GRB 020405 gB 13 58 03.12 -31 22 22.2   21.9 21.5     ~ 236 1
9 SN 1998bw SN* 19 35 03.17 -52 50 46.1   14.09       SNIc 1654 2
10 GRB 980703 gB 23 59 06.7 +08 35 07           ~ 421 1

    Equat.    Gal    SGal    Ecl

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2020.08.15-22:57:04

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