COMPTEL results on the 1.809 MeV gamma-ray line from the Galactic-center region
The COMPTEL experiment on the Compton Gamma-Ray Observatory is designed to image celestial gamma radiation in the energy range from 0.75–30 MeV within a field of view of 1 steradian. It can locate stronger point sources with an accuracy better than 0.5° and is capable of mapping diffuse emission as well. The Galactic-center region was observed by COMPTEL for several 2-week periods in 1991/1992. These observations show evidence for 1.8 MeV line emission along the Galactic disk (attributed to radioactive 26Al), extending over at least 40 degrees in longitude.
Advances in Space Research
Digital Object Identifier (DOI)
R. Diehl, K. Bennett, H. Bloemen, W. Collmar, W. Hermsen, G.G. Lichti, M. McConnell, D. Morris, J. Ryan, V. Schönfelder, H. Steinle, A.W. Strong, B.N. Swanenburg, M. Varendorff and C. Winkler. COMPTEL results on the 1.809 MeV gamma-ray line from the Galactic-center region. 1993, Adv. Space Research, 13, No. 12, pp. 723-726.