Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978natur.276..249v&link_type=abstract
Nature, vol. 276, Nov. 16, 1978, p. 249. NASA-supported research.
Astronomy and Astrophysics
Astronomy
1
Astronomical Models, Bursts, X Ray Sources, Interstellar Extinction, Interstellar Matter
Scientific paper
Four reasons for ruling out the Alcock and Hatchett (1978) proposal concerning the tails of X-ray bursts are advanced. This proposal suggests that the tails of X-ray bursts observed during burst decay are due to the small-angle scattering of the original pulse of X-rays on interstellar dust grains; grains with a typical size of approximately 3 microns are assumed. The arguments against this theory involve differences in burst tail sizes sometimes observed for bursts from the same source; the different kinds of bursts emitted by MXB 1730-335 (rapid burster); an indication that MXB 1730-335 bursts have tails less than 2 s long; and the lack of correlation between relative strength of burst tails and the interstellar absorption.
Lewin Walter H. G.
Paradijs Jan van
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