@inproceedings{oai:jaxa.repo.nii.ac.jp:00005284,
 author = {Burrows, David N.},
 book = {宇宙航空研究開発機構特別資料, JAXA Special Publication: Astrophysics with All-Sky X-Ray observations: 3rd International MAXI Workshop},
 month = {Feb},
 note = {Astrophysics with All-Sky X-Ray observations: 3rd International MAXI Workshop (RIKEN, 10-12 June 2008), I review recent results on GRB X-ray afterglows measured by the Swift X-ray Telescope (XRT). The XRT had observed over 290 X-ray afterglows of GRBs at the time of this meeting, obtaining > 80 % of the world total of GRB X-ray afterglows and > 70 % of the world total of GRBs with redshifts. I discuss general characteristics of X-ray afterglows as observed by Swift, and will then focus on a few of our most interesting discoveries. One of the most exciting of these was the recent "naked-eye" burst, GRB 080319B, with the brightest optical counterpart ever seen and one of the best-observed X-ray and optical light curves ever obtained. We interpret the bright prompt emission as the result of an extremely large bulk Lorentz factor, combined with a very narrow jet beamed directly at us, with Synchrotron Self-Compton emission from the UV/optical photons accounting for the gamma-ray emission. The X-ray and optical afterglows are interpreted as the result of a two-component jet, with the wide jet accounting for the optical afterglow, while the X-ray afterglow is initially dominated by the narrow jet until that component fades following its jet break., Physical characteristics: Original contains color illustrations, 資料番号: AA0064306045, レポート番号: JAXA-SP-08-014E},
 pages = {228--233},
 publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)},
 title = {Recent results of GRB X-ray afterglows},
 volume = {JAXA-SP-08-014E},
 year = {2009}
}