SAS-2 observations of celestial diffuse gamma radiation above 30 MeV

Details SAS-2 observations of celestial diffuse gamma radiation above 30 MeV SAS-2 observations of celestial diffuse gamma radiation above 30 MeV

Nov 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974csgr.conf...83t&link_type=abstract

In ESRO The Context and Status of Gamma Ray Astronomy p 83-88 (SEE N75-25813 16-93)

Astronomy and Astrophysics

Astronomy

Energy Spectra, Gamma Rays, Sas-2, Satellite Observation, Apollo 15 Flight, Astronomical Models, Big Bang Cosmology, Cosmic Rays, Diffuse Radiation, Flux Density, Red Shift, Sky Radiation, Spark Chambers, Spectrum Analysis

Scientific paper

The small astronomy satellite, SAS-2, used a 32-deck magnetic core digitized spark chamber to study gamma rays with energies above 30 MeV. Data for four regions of the sky away from the galactic plane were analyzed. These regions show a finite, diffuse flux of gamma rays with a steep energy spectrum, and the flux is uniform over all the regions. Represented by a power law, the differential energy spectrum shows an index of 2.5 + or - 0.4. The steep SAS-2 spectrum and the lower energy data are reasonably consistent with a neutral pion gamma-ray spectrum which was red-shifted (such as that proposed by some cosmological theories). It is concluded that the diffuse celestial gamma ray spectrum observed presents the possibility of cosmological studies and possible evidence for a residual cosmic ray density, and supports the galactic superclusters of matter and antimatter remaining from baryon-symmetric big bang.

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