Search Publications
Gamma-Ray Emission from the Orion Cloud Complex and the Ratio CO/H2
Catala, C.; Masnou, J. L.; Strong, A.
A new value for the density ratio of H2/(C-13)O is derived by making a comparison between the COS-B gamma-ray survey above 100 MeV and the CO survey of the Orion cloud complex. Results rely on the assumption that the gamma-ray emissivity above 100 MeV is uniform over the whole cloud complex and its surroundings, and has the local value derived by …
COS-B Results on a Search for Pulsed Gamma-ray Emission from Radio Pulsars
Bignami, G. F.; Hermsen, W.; Boella, G. +14 more
Gamma-ray data from ESA's satellite COS-B have been used in a search for pulsed gamma-ray emission from sources located in regions near the galactic plane. For this search, the radio data from a number of pulsars were used. Due to the inadequacy of the available radio pulsar parameters, which had to be derived by extrapolation from observations ma…
Gamma Ray Astronomy
Pinkau, K.
Results of gamma-ray astronomy in the energy range above 1 MeV are reviewed. COS-B observations of galactic and extragalactic gamma rays are described. It is concluded that: (1) the cosmic-ray intensity in the galactic disk appears to decrease in the anticenter direction beyond the sun; (2) supernova or pulsar production of a sudden injection of c…
A Test for the Origin of Galactic Gamma Rays
Schlickeiser, R.; Thielheim, K. O.
From measured COS B gamma-ray data it is possible to derive the variation of the ratio of the galactic gamma-ray flux in the two energy intervals 70-300 MeV and 300-2000 MeV as a function of galactic latitude for two longitudinal regions. It is shown that this energy ratio is a good test to discriminate between a more proton and a more electron in…
COS-B Observations of Localised Gamma-Ray Emission
Bignami, G. F.; Hermsen, W.; Masnou, J. L. +12 more
The ESA gamma-ray satellite COS-B has completed a survey of the galactic plane. The long exposure time combined with the effective angular resolution of ~2.5 deg (FWHM) for gamma rays above 100 MeV permits a detailed study of the spatial distribution of the radiation. In four observation periods a search for localised gamma-ray emission has been p…
COS-B Observations of Galactic Gamma-Ray Emission (Large Scale)
Bignami, G. F.; Hermsen, W.; Lebrun, F. +10 more
Most of the reqions of the sky already observed by COS-B contain part of the galactic disc. Detailed analysis has been completed of the data from many of these observation periods. In several cases a manual scanning, effective in removinq the background events has been incorporated in the processing sequence. The data collected during most of thes…