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Spark-chamber observation of galactic γ-radiation

Published online by Cambridge University Press:  14 August 2015

G. W. Hutchinson ,
A. J. Pearce ,
D. Ramsden  and
R. D. Wills
G. W. Hutchinson
Affiliation:
Physics Department, University of Southampton, England
A. J. Pearce
Affiliation:
Physics Department, University of Southampton, England
D. Ramsden
Affiliation:
Physics Department, University of Southampton, England
R. D. Wills
Affiliation:
Physics Department, University of Southampton, England

Abstract

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A γ-Ray telescope incorporating an acoustic spark chamber is included in the payload of the OGO-5 spacecraft. The performance of the instrument, which is sensitive to photons of energy 25 to 100 MeV, is discussed.

Observations are limited to a portion of the sky near Cygnus, but the first month's data indicate a variation of intensity showing a maximum in the direction of the galactic plane. If this plane contains a line source of radiation, its intensity is found to be (9 ± 5) × 10−4 photons cm−2 sec−1 rad−1 above an energy of 40 MeV.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 37: Non-Solar X- and Gamma-Ray Astronomy , 1970 , pp. 300 - 305
Copyright
Copyright © Reidel 1970 

References

Clark, G. W., Garmire, G. P., and Kraushaar, W. L.: 1968, Astrophys. J. 153, L203–L207.Google Scholar
Dean, A. J., Hutchinson, G. W., Ramsden, D., Taylor, B. G., and Wills, R. D.: 1968, Nucl. Instr. Meths. 65, 293–300.Google Scholar
Kraushaar, W. L.: 1970, this volume.Google Scholar