2381/808
D. Watson
D.
Watson
J.N. Reeves
J.N.
Reeves
Julian P. Osborne
Julian P.
Osborne
Paul T. O'Brien
Paul T.
O'Brien
Kenneth A. Pounds
Kenneth A.
Pounds
Jonathan A. Tedds
Jonathan A.
Tedds
M. Santos-Lleó
M.
Santos-Lleó
M. Ehle
M.
Ehle
The X-ray afterglows of gamma-ray bursts GRB001025A
and GRB010220 observed with XMM-Newton
University of Leicester
2009
gamma rays: bursts
supernovae: general
X-rays: general
2009-12-08 16:25:15
Journal contribution
https://figshare.le.ac.uk/articles/journal_contribution/The_X-ray_afterglows_of_gamma-ray_bursts_GRB001025A_and_GRB010220_observed_with_XMM-Newton/10090397
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.