Investigation of X-ray Objects with Astro-D and ROSAT
Grant-in-Aid for Overseas Scientific Survey.
|Allocation Type||Single-year Grants|
|Research Institution||The Institute of Space and Astronautical Science|
INOUE Hajime ISAS : Assistant Professor, 宇宙圏研究系, 助教授 (40092142)
VOGES W. MPI : Scientist, 研究員
HASINGER G. MPI : Scientist, 研究員
FINK H. MPI : Scientist, 研究員
BRINKMANN W. MPI : Chief Scientist, 主任研究員
TRUEMPER J. MPI : Professor, 教授
DOTANI Tadayasu ISAS : Assistant, 宇宙圏研究系, 助手 (30211410)
MITSUDA Kazuhisa ISAS : Assistant, 宇宙圏研究系, 助手 (80183961)
NAGASE Fumiaki ISAS : Professor, 宇宙圏研究系, 教授 (00022690)
TANAKA Yasuo ISAS : Professor, 宇宙圏研究系, 教授 (10022534)
|Project Period (FY)
Completed(Fiscal Year 1993)
|Keywords||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.
Research Output (2results)