U.S.-European-Japanese Workshop on Space Cooperation Summary Report (1999) / Chapter Skim
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F: Perspectives on ASCA
F: Perspectives on ASCA
Pages 51-63
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Appendix F Perspectives on ASCA 51
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~. Japanese institutions participating in the ASCA mission include ISAS, University of Tokyo, Tokyo Metropolitan University, Nagoya University, Osaka University, Kyoto University, RIKEN (The Institute for Physical and Chemical Research)
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It was also an entirely `domestic project. Though rather short lived, Tenma produced a number of fine spectroscopic results, carrying an on-board gas scintillation proportional counter newly developed at ISAS.
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2.5 Collaboration on the CCD Cameras As to the focal plane instruments on board As~o-D, two different types of detectors were selected. One is the gas scintillation proportional counter, which was developed in Japan and was used successfully in Tenma.
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The latter, under development at Osaka University, was thought to have by far the better position resolution and a significantly better energy resolution than the PIN device then available, but high-quality X-ray-sensitive CCD chips were not expected to become available domestically in time. At that time the first space-borne X-ray CCD was chosen as the focal plane detector for the Soft X-Ray Telescope experiment, a joint U.S.-]
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Makishima of Tokyo University, with collaborators at ISAS and several other Japanese institutions. GIS is a position-sensitive gas scintillation proportional counter, newly developed as an extension of the technology previously developed for the Tenma satellite.
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3.5 Data Sharing ir' the Guest Observation Phase When the PV phase ended, all the ASCA observing time became open to guest observations based on competitive proposals. The available observing time, after reserving about 5 percent for the spacecraft and hardware maintenance, was divided into three sectors: 60 percent for the Japanese investigations, 15 percent for the U.S.
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Senior Review in 1996, which awarded ASCA the second ranking, after the newly launched ISO mission, among various astrophysics missions in which NASA was involved. One particular benefit brought about by the cooperation is mutual exchange of scientific cultures between Japan and the United States.
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, foil mirrors (Goddard Space Flight Center (GSFC)
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Conical Mirror Developme'`t at GSFC (SerlemitsosJ · fate 1970s NASA SR&T funding led to the development of a lightweight X-ray mirror using thin plastic reflectors in the conical approximation. First test of this type of mirror done in 1978 at the X-ray calibration facility of Marshall Space Flight Center · Early 19SOs Successful proposal for a shuttle attached payload experiment called the Broadband X-ray Telescope (BBXRT)
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emphasizing imaging analysis. Largely under the ASCA program, GSFC developed a software system for X-ray data analysis based on the multimission concept involving generic software tools that can be used by different missions.
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This might require the development of more extensive ground calibration facilities. Acknowledgments ~ would like to acknowledge useful discussions with Pete Seriemitsos, George Ricker, Steve Kahn, and Pat Henry on venous aspects of the ASCA mission.
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