Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26as..120c..13s&link_type=abstract
Astronomy and Astrophysics Supplement, v.120, p.13-21
Astronomy and Astrophysics
Astronomy
22
Gamma-Ray Astronomy, Pulsar, Interstellar Medium, Nucleosynthesis, Active Galactic Nuclei, Gamma-Ray Bursts, Solar Flares, Cosmic Background Radiation
Scientific paper
The Imaging Compton Telescope (COMPTEL) aboard NASA's Compton Gamma-Ray Observatory has opened the 1 to 30MeV γ-ray energy range as a new window to astronomy. The first-ever broadband all-sky maps in this energy range now exist. A variety of γ-ray emitting objects are visible, namely spin-down pulsars, stellar black-hole candidates, supernova remnants, extended regions of interstellar space, nuclei of active galaxies, γ-ray bursts, and the Sun during solar flares. Moreover, the MeV range is rich in γ-ray lines. Here, COMPTEL has achieved a major breakthrough by generating the first all-sky map of the 1.8MeV line from radioactive ^26^Al. In addition, COMPTEL succeeded in the first detection of the 1.156MeV line from radioactive ^44^Ti from a supernova remnant (Cas A), and - again for the first time - detected MeV emission from the Orion complex that can be ascribed to nuclear interaction lines from excited ^12^C and ^16^O nuclei. Recently, indications of two ^56^Co lines at 847 and 1.238MeV were found in the measurement of SN 1991T.
Bennett Kevin
Bloemen Hans
Diehl Roland
Hermsen Willem
Lichti Giselher G.
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