Study of Gamma-ray Bursts by the Follow-up Observations Cooperated with the HETE2 Satellite

HETE2卫星后续观测对伽玛射线爆发的研究

• 批准号: 13640293
• 负责人: YAMAUCHI Makoto
• 金额: $ 0.96万
• 依托单位: University of Miyazaki
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13640293/
• 关键词: international collaboration; transient; gamma-ray burst; satellite; observation; x-ray spectrum; optical; afterglow; 分光

HETE2 satellite has started the static observation since early 2001. It has already found about 300 gamma-ray bursts(grbs). For about 70 bursts among them, HETE2 made a multi-wavelength follow up observation possible by delivering their precise positions to all over the world within a few dozens of second via Internet. Almost half of these grbs were found to have the x-ray, optical, or radio afterglow. The distance to the burst was also determined for about half of them. According to these results, the relation between grbs and type Ic supernovae becomes fairly certain.Grbs found and observed by HETE2 can be divided into three categories : typical grb, x-ray rich grb, or x-ray flash by their spectra. But there is no clear boundary among them, and their spectra found to be distributed continuously. Furthermore the relation between the peak energy and the isotropic energy found for typical grbs is also valid for x-ray flashes. So these results show the origin of three kinds of burst is possibly identical.We have successfully observed the optical afterglows of GRB030329 and GRB041006 using the automatic follow up observatory by receiving the HETE2 alert. Especially for GRB041006,we got the optical afterglow at only 70 seconds after the burst. This was the earliest observation among the world. We found that two breaks in its light curve are well explained by synchrotron shock model and a forward shock plays an important roll in generating the optical afterglow.

HETE2卫星自2001年初开始进行静态观测。它已经发现了大约300个伽马射线暴（grbs）。其中约有70次爆发，HETE2通过互联网在几十秒内将其精确位置传递给世界各地，使多波长跟踪观测成为可能。几乎一半的grbs被发现有x射线、光学或射电余辉。其中大约一半的爆炸距离也被确定。根据这些结果，grbs和Ic型超新星之间的关系变得相当确定。HETE2发现和观测到的grb根据光谱可分为典型grb、富x射线grb和x射线闪光三类。但它们之间没有明显的边界，光谱呈连续分布。此外，典型grbs的峰值能量与各向同性能量之间的关系也适用于x射线闪光。因此，这些结果表明三种爆发的起源可能是相同的。我们通过接收HETE2预警，利用自动跟踪天文台成功观测了GRB030329和GRB041006的光学余辉。特别是对于GRB041006，我们在爆发后仅70秒就获得了光学余辉。这是世界上最早的观察。我们发现同步加速器激波模型可以很好地解释其光曲线的两次中断，并且正向激波在光学余辉的产生中起着重要作用。

项目成果

Design and Performance of the Wide-Field X-Ray Monitor on Board the High-Energy Transient Explorer 2

高能瞬态探测器 2 上的广域 X 射线监视器的设计和性能

• 发表时间: 2003
• 期刊: Publications of the Astronomical Society of Japan 55・5
• 作者: M.Matsuoka;N.Kawai;T.Sakamoto;D.Q.Lamb;D.Q.Lamb;M.Matsuoka;N.Kawai;D.Q.Lamb;Y.Shirasaki;N.Kawai;Y.Shirasaki
• 通讯作者: Y.Shirasaki

Y.Shirasaki: "Design and Performance of the Wide-Field X-Ray Monitor on Board the High-Energy Transient Explorer 2"Publications of the Astronomical Society of Japan. 55・5. 1033-1049 (2003)

Y. Shirasaki：“高能瞬态探测器 2 上的广域 X 射线监视器的设计和性能”日本天文学会出版物 55・5（2003 年）。

G.Crew: "HETE-2 Localization and Observation of the Bright, X-Ray-rich Gamma-Ray Burst GRB 021211"The Astrophysical Journal. 599・1. 387-393 (2003)

G.Crew：“HETE-2 明亮、富含 X 射线的伽马射线爆发 GRB 021211 的定位和观测”《天体物理学杂志》599・1（2003 年）。

In-Orbit Performance of WXM(Wide-field X-Ray Monitor)

WXM（宽视场X射线监视器）在轨性能

• 发表时间: 2003
• 期刊: Proceedings of the AIP Conference 662
• 作者: M.Matsuoka;N.Kawai;T.Sakamoto;D.Q.Lamb;D.Q.Lamb;M.Matsuoka;N.Kawai;D.Q.Lamb;Y.Shirasaki;N.Kawai;Y.Shirasaki;G.Crew;N.Kawai
• 通讯作者: N.Kawai

RIBOTS : An Automatic Telescope System for Gamma-ray Burst Follow-up Observation

RIBOTS：用于伽马射线暴后续观测的自动望远镜系统

• 发表时间: 2001
• 期刊: Proceedings of ASP (Astronomical Society of the Pacific) Conference 251
• 作者: M.Matsuoka;N.Kawai;T.Sakamoto;D.Q.Lamb;D.Q.Lamb;M.Matsuoka;N.Kawai;D.Q.Lamb;Y.Shirasaki;N.Kawai;Y.Shirasaki;G.Crew;N.Kawai;G.Crew;G.Ricker;N.Kawai;M.Kohama
• 通讯作者: M.Kohama