Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978spfl...20...42c&link_type=abstract
Spaceflight, vol. 20, Feb. 1978, p. 42-47. Research supported by the Science Research Council.
Astronomy and Astrophysics
Astronomy
Ariel 5 Satellite, Satellite-Borne Instruments, X Ray Astronomy, Energy Spectra, Instrument Packages, X Ray Spectra
Scientific paper
The Ariel 5 satellite has proven effective in measuring cosmic X-rays across a wide band of energy levels. Solid crystals are used to produce scintillations corresponding to X-rays of energies from 2 keV to 1 MeV. Two broad sets of experiments are built into the satellite. The first, or pointing set, is aligned with the satellite spin-axis and includes: a high energy scintillation counter, measuring X-rays between 30 keV and 1 MeV; a low energy scintillation counter, sensitive from 30 down to 2 keV; a proportional counter to locate the position of X-ray sources; and a Bragg spectrometer to analyze discrete X-ray packets emanating from specific elements. The second, or scanning set, is pointed orthogonally to the spin-axis and includes: two proportional counters to scan the sky around the satellite's equator, and an all-sky monitor with a resolution of one hour (rather than a few minutes). The scientific yield has thus far provided information on transient X-ray sources, established sources, and X-ray bursts.
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