High energy resolution observation of the Crab and AO535 plus 26 in the hard X-ray rangeA number of uncertainties exist currently regarding the existence of gamma-ray lines in the Crab spectrum. An investigation was, therefore, conducted, and the Crab was observed for eight hours during a balloon flight from Palestine, TX, on September 26, 1980. It appeared that the binary source AO535 plus 26 contaminated the Crab data. It was, however, possible to separate the two sources. The obtained results are discussed and evaluated. It is found that the possibility of a line at 73 keV with the intensity reported by Ling et al. (1979) can be excluded for the obtained data. The 400 keV line cannot be ruled out. The results concerning AO535 plus 26 are very different from those previously obtained.
Document ID
19820046847
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Hameury, J. M. (Commissariat a l'Energie Atomique Gif-sur-Yvette, France)
Boclet, D. (Commissariat a l'Energie Atomique Gif-sur-Yvette, France)
Durouchoux, P. (Commissariat a l'Energie Atomique, Section d'Astrophysique, Gif-sur-Yvette Essonne, France)
Cline, T. (Commissariat a l'Energie Atomique Gif-sur-Yvette, France)
Teegarden, B. (Commissariat a l'Energie Atomique Gif-sur-Yvette, France)
Tueller, J. (NASA Goddard Space Flight Center Laboratory for High Energy Astrophysics, Greenbelt, MD, United States)
Paciesas, W. (NASA Goddard Space Flight Center Laboratory for High Energy Astrophysics, Greenbelt; Maryland, University, College Park, MD, United States)
Haymes, R. (Rice University Houston, TX, United States)