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A large area telescope for balloon-borne hard X-ray astronomy |
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| Authors: | RE Baker G Barbaglia A Bazzano L Boccaccini A Bussini A Carzaniga A Court AJ Dean NA Dipper G Ferrandi N Haskell C Lapadula RA Lewis D Maccagni M Mastropietro R Patriarca F Perotti VF Polcaro E Quadrini D Ramsden S Sembay R Spicer P Ubertini G Villa D Whatley |
| Affiliation: | 1. Department of Physics, The University, Southampton, U.K.;2. Istituto di Fisica Cosmica, Milan, Italy;3. Istituto Astrofisica Spaziale, Frascati, Italy |
| Abstract: | A balloon-borne hard X-ray telescope is described that has been designed to make highly sensitive observations of cosmic sources in the energy range 15 to 300 keV. The payload is characterized by a combination of NaI(Tl) based detector of a novel design and spectroscopic proportional counters, providing a total sensitive area of 5000 cm2 and a 1 standard deviation sensitivity at the level of about 4 × 10−6 photons cm−2 s−1 keV−1. All of the telescope sub-systems are described including the micro-processor based orientation platform that provides a pointing stability of better than 10 arc min. The physical characteristics of the detectors are included along with a summary of the telescope performance during a balloon flight in 1982. |
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