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|Title:||The X-ray afterglows of gamma-ray bursts GRB001025A and GRB010220 observed with XMM-Newton|
Osborne, Julian P.
O'Brien, Paul T.
Pounds, Kenneth A.
|Publisher:||EDP Sciences for European Southern Observatory (ESO)|
|Citation:||Astronomy and Astrophysics, 2002, 393 (1), pp.L1-L5|
|Abstract:||The X-ray afterglows of GRB 001025A and GRB 010220 were detected by XMM-Newton with an average 0.2-10.0 keV flux of 4.4 and 3.3 X 10[superscript -14] erg cm[superscript -2] s[superscript -1] respectively; the afterglow of GRB 001025A is observed to decay. Afterglows at other wavelengths were not detected for either burst. A set of broadened soft X-ray emission lines are detected in the afterglow of GRB 001025A, at 5.0 σ significance above a Galactic-absorbed power-law continuum. The spectra of both afterglows are significantly better fit by a variable abundance thermal plasma model than by an absorbed power-law and are consistent with the observations of GRB 011211, indicating that thermal emission from light elements may be common in the early X-ray afterglows of GRBs.|
|Rights:||© ESO 2002. Reproduced with permission from Astronomy & Astrophysics.|
|Appears in Collections:||Published Articles, Dept. of Physics and Astronomy|
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|10.1051_0004-6361_20021132.pdf||Published (publisher PDF)||129.82 kB||Adobe PDF||View/Open|
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