Very High Energy Astrophysics

极高能量γ射线的探测已经成为实际可能，可以与天体物理现象的观测研究结合起来。在1995至1998财政年度，我们尝试利用“高能天体”优先领域资助基金，促进高能γ射线和宇宙射线的研究，并特别注意发展和建立与其他电磁辐射波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。我们的工作包括两个主要项目（发展对最高能量宇宙射线的观测和促进对极高能量γ射线的观测），以及在宇宙射线、γ射线观测和理论研究领域的一些较小规模的其他项目。如2000年1月发表的报告所述，这些项目的成果和成果已在1999年进行了审查，更多的内容总结为；(1)我们的努力有助于最近建立观测高能γ射线领域的进展，例如，通过发现几种发射这种γ射线的源；(2)在四年内组织了六次国内和一次国际研讨会，讨论γ射线天文学，这将有可能形成一个不断增长的（国内）社区，以促进日本高能γ射线天体物理学的进一步发展。下一步，我们计划建立一个由4台100 GeV的甚高能γ射线望远镜组成的系统，该方案已获得资助，作为科研资助“卓越中心”项目之一，并于1999财政年度开始建设。东京大学宇宙射线研究所同意推进探测最高能量（超过1020ev）的项目。因此，我们的努力并非徒劳，我们相信今后几年将会有一个良好的前景。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