Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apjs...92..351g&link_type=abstract
The Astrophysical Journal Supplement Series, vol. 92, no. 2, p. 351-362
Astronomy and Astrophysics
Astronomy
14
Active Galactic Nuclei, Gamma Ray Astronomy, Gamma Ray Bursts, Gamma Ray Observatory, Gamma Ray Telescopes, Spaceborne Astronomy, Spaceborne Telescopes, Pulsars, Satellite-Borne Instruments, Supernova 1987A, X Ray Binaries
Scientific paper
The Arthur Holly Compton Gamma Ray Observatory Compton) is the second in NASA's series of great Observatories. Launched on 1991 April 5, Compton represents a dramatic increase in capability over previous gamma-ray missions. The spacecraft and scientific instruments are all in good health, and many significant discoveries have already been made. We describe the capabilities of the four scientific instruments, and the observing program of the first 2 years of the mission. Examples of early discoveries by Compton are enumerated, including the discovery that gamma-ray bursts are isotropic but spatially inhomogeneous in their distribution; the discovery of a new class of high-energy extragalacatic gamma-ray sources, the gamma-ray AGNs; the discovery of emission from SN 1987A in the nuclear line of Co-57; and the mapping of emission from Al-26 in the interstellar medium (ISM) near the Galactic center. Future observations will include deep surveys of selected regions of the sky, long-tem studies of individual objects, correlative studies of objects at gamma-ray and other energies, a Galactic plane survey at intermediate gamma-ray energies, and improved statistics on gamma-ray bursts to search for small anisotropies. After completion of the all-sky survey, a Guest Investigator program is in progress with guest observers' time share increasing from 30% upward for the late mission phases.
Chipman Eric
Gehrels Neil
Kniffen Donald
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