Investigation of X-ray Objects with Astro-D and ROSAT

使用 Astro-D 和 ROSAT 研究 X 射线物体

• 批准号: 05044211
• 负责人: INOUE Hajime
• 金额: --
• 依托单位: The Institute of Space and Astronautical Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Overseas Scientific Survey.
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05044211/
• 关键词: X-Ray Astronomy; Space Observatory; Supernova; Clusters of Galaxies; Cosmic X-Ray Background

The Japan's fourth X-ray astronomy satellite, Astro-D was successfully launched on Feb. 20, 1993, and was named ASCA. The key elements of ASCA were successively turned on in orbit and it started its observatory work since April, 1993. The performance verification observations were done from April to October and not only the performance of the scientific instruments but also the scientific capability wes verified. After then, the guest observations based on proposals by astronomers in the world started.ASCA is the first X-ray astronomy satellite capable of imaging the X-ray sky in the wide energy range over 0.5 to 12 keV, although the image size of the X-ray telescope is approximately 1 arcminutes FWHM. The sensitivity of ASCA is much better than that of non-imaging instruments such as the large area counters on board Ginga. Furthermore, the CCD camera was carried into orbit for the first time by ASCA and has an outstanding spectral resolution. On the other hand, the German X-ray astronomy satellite ROSAT which has been in orbit for about four years has much better imaging capability and higher sensitivity in the energy range below 0.5 keV than ASCA. ASCA and ROSAT are complementary to each other and several simultaneous observations were already performed both in the performance verification period and the guest observation period. The results of the all sky survey done by ROSAT have also been useful to several ASCA pointing observations. The yields of these collaborations were presented in the international symposium "New Horizon in X-Ray Astronomy-First Rsults from ASCA-" held at the Tokyo Metropolitan University by Institute of Space and Astronautical Science in March, 1994.

日本第四颗X射线天文卫星Astro-D于1993年2月20日成功发射，命名为ASCA。 ASCA关键部件陆续在轨开机，自1993年4月起开始观测工作。4月至10月进行了性能验证观测，不仅验证了科学仪器的性能，也验证了科学能力。随后，根据全球天文学家建议进行的客座观测开始了。ASCA是第一颗能够在0.5至12keV的宽能量范围内对X射线天空进行成像的X射线天文卫星，尽管X射线望远镜的图像尺寸约为1角分半峰宽。 ASCA 的灵敏度比 Ginga 上的大面积计数器等非成像仪器好得多。此外，该CCD相机首次被ASCA送入轨道，具有出色的光谱分辨率。另一方面，已在轨运行约四年的德国X射线天文卫星ROSAT在0.5 keV以下的能量范围内比ASCA具有更好的成像能力和更高的灵敏度。 ASCA和ROSAT是互补的，在性能验证期和客座观察期都已经进行了多次同步观察。 ROSAT 进行的全天空巡天结果也对一些 ASCA 指向观测有用。这些合作的成果于1994年3月在东京都立大学空间与宇宙科学研究所举办的国际研讨会“X射线天文学的新视野-ASCA的第一个成果-”上发表。