X-ray observations from the space shuttle |
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| Institution: | 1. Department of Physics, Xiangtan University, Xiangtan 411105, China;2. Institute for Advanced Study, 1 Einstein Drive, Princeton, NJ 08540, USA;3. Department of Astronomy, University of Wisconsin, 475 North Charter Street, Madison, WI 53706, USA;4. Centro de Investigación en Astronomía, Universidad Bernardo O''Higgins, Santiago, General Gana 1760, 8370993, Chile;5. Escola de Artes, Ciências e Humanidades, Universidade de São Paulo, Av. Arlindo Béttio, 1000 – Vila Guaraciaba, CEP: 03828-000, São Paulo - SP, Brazil |
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| Abstract: | The flight of the University of Birmingham X-ray Telescope, which took place between 29th July and 6 August 1985 is reviewed. Despite the competing demands of twelve other investigations on-board, it was found possible to plan an observing programme for the XRT which enabled a good (43%) utilisation of the total operating time to be achieved, and then to carry out this programme with high efficiency. An important element here was the inclusion within the XRT of a pointing mount, which enabled it to point with a degree of independence of the Orbiter vehicle. The background of spurious events in the detector, due mainly to energetic particles, was found to be low and well-behaved, except for occasional events which are not easy to distinguish from X-ray bursts. The spectral intensity of unrejected background varies from about 2.10−3/cm2sec keV at 8 keV to 5.10−4/cm2 sec keV at 25 keV. |
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