Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992sao..reptr....s&link_type=abstract
Final Report, 1 Oct. 1984 - 30 Sep. 1991 Smithsonian Astrophysical Observatory, Cambridge, MA.
Astronomy and Astrophysics
Astronomy
Astronomy, Collimators, Data Bases, Heao 1, Modulation, Modulators, Proportional Counters, Scanners, X Ray Sources, Emission, Energy Bands, Losses, Position (Location), X Rays
Scientific paper
The hardware specification for the Scanning Modulation Collimator (MC) experiment on HEAO-1 was to measure positions of bright (greater than 10-11 ergs/cm2s), hard (1 to 15 keV) x-ray sources to 5-10 arcsec, and to measure their size and structure in three energy bands down to 10 arcsec resolution. The scientific purpose of this specification was to enable the identification of these x-ray sources with optical and radio objects in order to elucidate the x-ray emission mechanism and the nature of the candidate astronomical system. The experiment was an outstanding success. Hardware systems functioned perfectly although loss of one (out of eight) proportional counters degraded our sensitivity by about 10 percent. Our aspect solution of 7 arcsec precision, allowed us to achieve statistic-limited location precision for all but the strongest sources. We vigorously pursued a strategy of determining the scientific importance of each identification, and of publishing each scientific result as it came along.
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