Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...446..261k&link_type=abstract
Astrophysical Journal v.446, p.261
Astronomy and Astrophysics
Astronomy
1
Gamma Rays: Bursts, Ism: Dust, Extinction
Scientific paper
Following a recent suggestion in the literature (Paczyn´ski 1991; Schaefer 1993), we investigate the potential of the soft X-ray flashes, which are observed to accompany gamma-ray bursts (GRBs), as a tool to constrain the distance scale of the bursters. If the bursters are located in a Galactic corona or at cosmological distances, then the bursts must cross the interstellar medium of the whole Galaxy on their way to the observer. Based on a model of the Galactic dust and gas distribution from Chi & Wolfendale (1991) we demonstrate how in this case at energies around 1 keV scattering by the dust and absorption by the gas would influence the angular distribution of the observed X-ray flashes dependent on their Galactic latitude. We finally discuss promises and limitations of the observations of X-ray flashes as well as the search for dust-scattered transient X-ray halos of GRBs.
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