Are short GRBs really hard?

T. Sakamoto*, L. Barbier, S. Barthelmy, J. Cummings, E. Fenimore, N. Gehrels, D. Hullinger, H. Krimm, C. Markwardt, D. Palmer, A. Parsons, G. Sato, J. Tueller, R. Aptekar, T. Cline, S. Golenetskii, E. Mazets, V. Pal'Shin, G. Ricker, D. LambJ. L. Atteia, N. Kawai


研究成果: Conference contribution

5 被引用数 (Scopus)


Thanks to the rapid position notice and response by HETE-2 and Swift, the X-ray afterglow emissions have been found for four recent short gamma-ray bursts (GRBs; GRB 050509b, GRB 050709, GRB 050724, and GRB 050813). The positions of three out of four short GRBs are coincident with galaxies with no current or recent star formation. This discovery tightens the case for a different origin for short and long GRBs. On the other hand, from the prompt emission point of view, a short GRB shows a harder spectrum comparing to that of the long duration GRBs according to the BATSE observations. We investigate the prompt emission properties of four short GRBs observed by Swift/BAT. We found that the hardness of all four BAT short GRBs is in between the BATSE range for short and long GRBs. We will discuss the spectral properties of short GRBs including the short GRB sample of Konus-Wind and HETE-2 to understand the hard nature of the BATSE short GRBs.

ホスト出版物のタイトルAIP Conference Proceedings
出版ステータスPublished - 2006 5月 19
イベントGAMMA-RAY BURSTS IN THE SWIFT ERA: 16th Maryland Astrophysics Conference - Washington, D.C.
継続期間: 2005 11月 292005 12月 2


OtherGAMMA-RAY BURSTS IN THE SWIFT ERA: 16th Maryland Astrophysics Conference
CityWashington, D.C.

ASJC Scopus subject areas

  • 物理学および天文学一般


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