2006A&A...449..203T


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.11CEST22:13:38

2006A&A...449..203T - Astronomy and Astrophysics, volume 449, 203-209 (2006/4-1)

Dust-scattered X-ray halos around gamma-ray bursts: GRB 031203 revisited and the new case of GRB 050713A.

TIENGO A. and MEREGHETTI S.

Abstract (from CDS):

Scattering by interstellar dust grains can produce time variable X-ray halos around gamma-ray bursts (GRB). In particular, an X-ray expanding ring is expected when a short pulse of X-ray radiation is scattered by a narrow layer of dust in our Galaxy. We present a new method for detecting and analyzing dust-scattering expanding rings around gamma-ray bursts, using as an example the XMM-Newton data of GRB 031203. Consistent with previous reports, we found that the two expanding rings observed in this burst are due to dust unevenly distributed in two layers at distances of 870 and 1384pc, with the more distant one responsible for 70% of the total optical depth. Our modelling of the rings indicates that the prompt X-ray emission of GRB 031203 was consistent with a power law spectrum with photon index Γ=2.1±0.2 and 1-2keV fluence of (3.6±0.2)x10–7erg/cm2. Thanks to the sensitivity of our technique, we discovered an expanding ring around another burst recently observed with XMM-Newton, GRB 050713A. In this case the dust layer is located at a distance of 364 pc, and we derived a GRB fluence of (1.2±0.3)x10–7erg/cm2 (1-2keV). A search for similar halos in twelve other bursts observed with XMM-Newton gave negative results.

Abstract Copyright:

Journal keyword(s): gamma rays: bursts - methods: data analysis

Simbad objects: 15

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Number of rows : 15

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 GRB 050326 gB 00 27 49.110 -71 22 16.40   20.55       ~ 56 0
2 GRB 010220 gB 02 36 59.0 +61 46 00           ~ 40 0
3 GRB 030227 gB 04 57 32.2 +20 29 54           ~ 71 0
4 SN 2003lw SN* 08 02 30.1 -39 51 03       20.23   SNIc: 508 0
5 GRB 050820B gB 09 02 25.370 -72 38 43.69           ~ 32 0
6 GRB 011211 gB 11 15 16 -21 56.0           ~ 285 1
7 GRB 040106 gB 11 52 12.3 -46 47 16           ~ 34 0
8 GRB 050730 gB 14 08 17.090 -03 46 18.90   20.32 17.68     ~ 283 1
9 GRB 040827 gB 15 16 59.8 -16 08 21           ~ 32 0
10 GRB 020321 gB 16 11 56.7 -83 39 57           ~ 26 0
11 GRB 050724 gB 16 24 44.400 -27 32 27.90     19.70     ~ 385 1
12 GRB 040223 gB 16 39 30.2 -41 56 00           ~ 32 0
13 GRB 020322 gB 18 00 48.5 +81 06 13           ~ 42 0
14 GRB 050223 gB 18 05 32.200 -62 28 20.40           ~ 100 0
15 GRB 050713A gB 21 22 09.530 +77 04 29.50           ~ 111 0

    Equat.    Gal    SGal    Ecl

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2020.08.11-22:13:38

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