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Title: The X-ray afterglows of gamma-ray bursts GRB001025A and GRB010220 observed with XMM-Newton
Authors: Watson, D.
Reeves, J.N.
Osborne, Julian P.
O'Brien, Paul T.
Pounds, Kenneth A.
Tedds, Jonathan A.
Santos-Lleó, M.
Ehle, M.
First Published: 1-Oct-2002
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.
DOI Link: 10.1051/0004-6361:20021132
ISSN: 0004-6361
eISSN: 1432-0746
Version: Publisher Version
Status: Peer-reviewed
Type: Article
Rights: © ESO 2002. Reproduced with permission from Astronomy & Astrophysics.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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