Accession Number : AD0694460

Title :   ENERGETIC GAMMA RAY EMISSION FROM THE GENERAL DIRECTION OF THE CYGNUS CONSTELLATION.

Descriptive Note : Technical rept.,

Corporate Author : MINNESOTA UNIV MINNEAPOLIS COSMIC RAY GROUP

Personal Author(s) : Valdez,J. V. ; Freier,P. S. ; Waddington,C. J.

Report Date : JUL 1969

Pagination or Media Count : 16

Abstract : A combination nuclear emulsion and spark chamber gamma ray telescope has been flown on a high altitude balloon to study a region in the constellation Cygnus for evidence of possible point source or line source emission of E > 100 MeV gamma rays. The region surveyed in this observation covers approximately 280 degrees to 315 degrees R. A. and 25 degrees N to 45 degrees N declination. In this region lie two potential point sources, Cyg A and Cyg XR-1, together with a section of the galactic plane covering galactic longitudes of 60 to 90 degrees. The response of the detector has been calculated using a Monte-Carlo simulation. This enables us to derive an energy spectrum and flux value for the general background of gamma rays, which are presumably atmospheric in origin. (Author)

Descriptors :   (*COSMIC RAYS, *GAMMA RAY SPECTRA), GAMMA COUNTERS, GALAXIES, BACKGROUND, NUMERICAL ANALYSIS

Subject Categories : Astrophysics
      Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE