Very High Energy Astrophysics

超高能γ射线的探测实际上已有可能加入天体物理现象的观测研究。在1995年至1998财政年度，我们利用优先领域补助基金，试图促进对甚高能γ射线和宇宙射线的研究，特别注意发展和建立与其他电磁辐射频段以及邻近粒子物理和理论研究领域的工作人员的合作联系。我们的努力包括两个主要项目(发展最高能量宇宙射线观测和促进甚高能γ射线观测)，以及在宇宙射线领域的其他一些较小规模的项目，γ-射线观测和理论研究。正如2000年1月发表的报告所述，这些项目的结果和成果已在1999年内进行了审查，…更多的内容概括为：(1)我们的努力为建立甚高能γ射线观测领域的最新进展做出了贡献，例如，通过发现几种发射这种γ射线的源；(2)在四年的时间里组织了六次国内和一次国际研讨会，讨论γ-射线天文学，来自邻近领域的许多人可能会形成一个不断增长的(国内)社区，以鼓励日本甚高能γ-射线天体物理学的进一步发展。我们计划下一步建立一个由四个望远镜组成的系统，用于100GeV的甚高能γ-射线，该建议被资助并被采纳为科学研究补助金“卓越中心”计划之一，并于1999财政年度开始建设。一个探测最高能量(超过1020 eV)的项目被同意作为东京大学宇宙线研究所的一项重大计划加以推进。因此，我们的努力并不是徒劳的，我们相信未来几年会有一个良好的前景。较少

Detection of very high energy γ-rays has been made practically possible to join observational study of astrophysical phenomena. We have attempted, by using the fund of Grant-in-Aid for the Field of Prioriy, "very high energy celestial objects", from 1995 to 1998 fiscal years, to promote the study of very high energy γ-rays and cosmic rays paying a special attention to develop and establish a collaborative link with people working in the other bands of electromagnetic radiation as well as those in the neighboring fields of particle physics and theoretical studies.Our efforts consist of two major projects (for developing observation of highest energy cosmic rays and for promoting observation of very high energy γ-rays) combined with a number of other projects of smaller sizes in the area of cosmic rays, γ-ray observation and theoretical studies. The results and outcomes of these projects have been reviewed during the 1999 year as described in the report published in January 2000, and the … More contents are summarized as ; (1) our efforts have contributed to the recent progress of establishing the field of observing very high energy γ-rays, for instance, by discovering several sources of emitting such γ-rays ; (2) six domestic and one international symposium are organized during the four years for discussing γ-ray astronomy among many from neighboring fields, which would potentially form a growing (domestic) community to encourage further development of very high energy γ-ray astrophysics in Japan.We have planned as the next step to have a system of four telescopes for very high energy γ-rays of 100 GeV, and the proposal was funded, adopted as one of the "Center of Excellence" program of Grant-in-Aid for scientific researches, and the construction was commenced in the 1999 fiscal years. A project for detecting the highest energy (beyond 1020 eV is agreed to be promoted as a major plan of Institute for Cosmic Ray Research, University of Tokyo. Thus, our efforts were not useless and we believe a good prospect will follow in the years to come. Less