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The γ -ray Emissivity of the Local Interstellar Medium from Correlations with Gas at Intermediate Latitudes

Strong, A. W.; Wolfendale, A. W.

A survey of recent studies of the correlation between γ -rays from latitudes |b| > 10 degrees and gas tracers is presented. Results for the ranges 35-100 MeV and above 100 MeV from the SAS-2 satellite, and for energies between 70 and 5000 MeV from the COS-B satellite, are used to obtain an estimate of the γ -ray emissivity spectrum for all form…

Low-Latitude Galactic γ -ray Emission: A Probe, not a Proof

Bignami, G. F.

The emission of high energy (above 70 MeV) γ -rays from the galactic disc has been mapped by the COS-B mission with unprecedented detail. The results for |b| < 15 degrees are seen to contain evidence of structures correlated with the Galaxy on various scales, from the `grand design' down to granularities, showing that the diffuse interstellar m…

On the Evidence for High Energy γ -ray Emission from the Orion Nebula Stemming from COS-B Observations

Caraveo, P. A.

The E.S.A. COS-B satellite performed a one-month observation pointing in the direction of M42 in Orion, during July-August 1978. An excess of high energy (above 100 MeV) photons is seen in the data, well coinciding with the Orion cloud complex. Features of such an excess are discussed, such as flux value, spectral shape and possible spatial extens…