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A detailed analysis of the high energy gamma-ray emission from the Crab pulsar and nebula.

Grenier, I. A.; Hermsen, W.; Bennett, K. +4 more

The gamma-ray emissions from the Crab pulsar and nebula are analyzed. The data were collected from 1975-1982 in the Galactic anticenter region by COS-B in the energy range 50-3000 MeV. The temporal behavior of the pulsed gamma-ray flux from PSR 0531 + 21 and the unpulsed gamma-ray emissions from the Crab region are examined. It is determined that …

High-energy gamma-ray and hard X-ray observations of CYG X-3.

Strong, A. W.; Hermsen, W.; Pollock, A. M. T. +7 more

High-energy (70 MeV < E < 5 GeV) gamma-ray observations of Cyg X-3 by the ESA satellite COS-B and hard X-ray (14 keV < E < 140 keV) observations by the Leiden-MIT balloon experiment, Leimit, are presented. A comparison with, and a study of earlier results over the 14 decades in energy from 1 keV up to ≡10¹⁷eV indicates that …

High-Energy Gamma Rays Probing Cosmic-Ray Spectral Differences thoughout the Galaxy

Bloemen, J. B. G. M.

Detailed spectra of the Galactic γ-ray emission (50 MeV-6 GeV) are derived from a combination of all the observations obtained with the COS-B satellite. These spectra indicate that the cosmic-ray (CR) proton spectrum is on average flatter in the outer Galaxy than in the inner Galaxy and locally by approximately ∝ E^0.4, and maybe more, s…

The final COS-B database - In-flight calibration of sensitivity and instrumental background behaviour

Strong, A. W.; Hermsen, W.; Lebrun, F. +3 more

This is one in a series of papers prepared in association with the release of the final COS-B database. Various aspects of the performance of the COS-B gamma-ray telescope are studied using in-flight data. First, the time-variation of the sensitivity and background over the 6.7 years of the mission is investigated. COS-B observed many regions of t…

Cosmic ray gradients in the outer Galaxy

Wolfendale, A. W.; Mayer, C. J.; Richardson, K. M. +2 more

The release of basic cosmic gamma ray data from the COS B satellite experiment has enabled a more detailed analysis than hitherto of the problem of variations of cosmic ray intensity locally and in the Outer Galaxy. It is found that there is still evidence for a modest cosmic ray gradient, particularly at the highest gamma ray energies where the p…

COS-B upper limit to the greater than 70 MeV gamma-ray flux from a gamma-ray burst event of 1979 November 9

Clements, D. L.; Williams, O. R.; Sumner, T. J. +1 more

Using the COS-B data base an upper limit of 2×10^-7cm^-2s^-1keV^-1 has been set to the high energy (70 - 1000 MeV) gamma-ray burst flux from a gamma-ray burst event of 1979 November 9. This limit is consistent with a power law extension from the lower energy data with a differential index of ≤-1.39. An upper…