Report
Global Properties of X-Ray Flashes and X-Ray-Rich Gamma-Ray Bursts Observed by Swift
| العنوان: | Global Properties of X-Ray Flashes and X-Ray-Rich Gamma-Ray Bursts Observed by Swift |
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| المؤلفون: | Sakamoto, T., Hullinger, D., Sato, G., Yamazaki, R., Barbier, L., Barthelmy, S. D., Cummings, J. R., Fenimore, E. E., Gehrels, N., Krimm, H. A., Lamb, D. Q., Markwardt, C. B., Osborne, J. P., Palmer, D. M., Parsons, A. M., Stamatikos, M., Tueller, J. |
| سنة النشر: | 2008 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics |
| الوصف: | We describe and discuss the spectral and temporal characteristics of the prompt emission and X-ray afterglow emission of X-ray flashes (XRFs) and X-ray-rich gamma-ray bursts (XRRs) detected and observed by Swift between December 2004 and September 2006. We compare these characteristics to a sample of conventional classical gamma-ray bursts (C-GRBs) observed during the same period. We confirm the correlation between Epeak_obs and fluence noted by others and find further evidence that XRFs, XRRs and C-GRBs form a continuum. We also confirm that our known redshift sample is consistent with the correlation between the peak energy in the GRB rest frame (Epeak_src) and the isotropic radiated energy (Eiso), so called the Epeak_src-Eiso relation. The spectral properties of X-ray afterglows of XRFs and C-GRBs are similar, but the temporal properties of XRFs and C-GRBs are quite different. We found that the light curves of C-GRB afterglows show a break to steeper indices (shallow-to-steep break) at much earlier times than do XRF afterglows. Moreover, the overall luminosity of XRF X-ray afterglows is systematically smaller by a factor of two or more compared to that of C-GRBs. These distinct differences between the X-ray afterglows of XRFs and C-GRBs may be the key to understanding not only the mysterious shallow-to-steep break in X-ray afterglow light curves, but also the unique nature of XRFs. Comment: 50 pages, 22 figures, Accepted for publication in ApJ |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1086/586884 |
| URL الوصول: | http://arxiv.org/abs/0801.4319 |
| رقم الانضمام: | edsarx.0801.4319 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1086/586884 |
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