Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-10-31
Astrophys.J.653:L81-L84,2006
Astronomy and Astrophysics
Astrophysics
9 pages in emulateapj format, including 4 figures and 1 table, accepted for publication in ApJ Letters
Scientific paper
10.1086/510516
The spectral and temporal properties of the non-thermal emission ofthe nearby XRF 060218 in 0.3-150 keV band are studied. We show that both the spectral energy distribution and the light curve properties suggest the same origin of the non-thermal emission detected by {\em Swift} BAT and XRT. This event has the longest pulse duration and spectral lag observed to date among the known GRBs. The pulse structure and its energy dependence are analogous to typical GRBs. By extrapolating the observed spectral lag to the {\em CGRO/BATSE} bands we find that the hypothesis that this event complies with the same luminosity-lag relation with bright GRBs cannot be ruled out at $2\sigma$ significance level. These intriguing facts, along with its compliance with the Amati-relation, indicate that XRF 060218 shares the similar radiation physics as typical GRBs.
Dai Gao Z.
Gehrels Neil
Liang E.-W.
Norris Jay
Stamatikos Mike
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