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X-Ray Afterglows of GRBs 050318 and 060124 and their External Shock Origin
Jin Zhang1; Yi PingQin2; Fu WenZhang1; Bin BinZhang1
2007
Source PublicationChinese Journal of Astronomy and Astrophysics
ISSN1009-9271
Volume7Issue:4Pages:516
AbstractThe observations with Swift X-ray telescope (XRT) challenge the conventional gamma-ray burst model in many aspects. The XRT light curves are generally composed of four consecutive segments, i.e., a steep decay segment, a shallow decay segment, a normal decay segment, a jet-like steep decay segment, and sometimes erratic flares as well. The phys-ical origin of the X-ray emission is highly debatable. We focus here on the physical origin of the X-ray emissions of GRBs 050318 and 060124. We present the XRT light curves and spectra of the two bursts. The light curve decay slopes of the two bursts are normal, and their relations to the spectral indices are consistent with the prediction of the standard forward shock model. The multi-wavelength light curves at 0.5keV, 1.0keV, 2.0keV and 4.0keV can be reproduced by this model with an isotropic kinetic energy E_k = 2.2×10~(52) erg, ε_e = 0.04, B = 0.01 for GRB 050318 and E_k = 4.2×10~(53) erg, ε_e = 0.05, B = 0.01 for GRB 060124. These facts suggest that the normal decay phases of the X-rays for the two bursts are of the forward shock origin.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/40655
Collection中国科学院国家天文台
Affiliation1.中国科学院国家天文台
2.广州大学
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Jin Zhang,Yi PingQin,Fu WenZhang,et al. X-Ray Afterglows of GRBs 050318 and 060124 and their External Shock Origin[J]. Chinese Journal of Astronomy and Astrophysics,2007,7(4):516.
APA Jin Zhang,Yi PingQin,Fu WenZhang,&Bin BinZhang.(2007).X-Ray Afterglows of GRBs 050318 and 060124 and their External Shock Origin.Chinese Journal of Astronomy and Astrophysics,7(4),516.
MLA Jin Zhang,et al."X-Ray Afterglows of GRBs 050318 and 060124 and their External Shock Origin".Chinese Journal of Astronomy and Astrophysics 7.4(2007):516.
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