Other
Scientific paper
May 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979phdt.........2f&link_type=abstract
Ph.D. Thesis Iowa State Univ. of Science and Technology, Ames.
Other
Cygnus Constellation, Hadrons, Spectrum Analysis, X Ray Sources, Calorimeters, Cosmic Rays, Heat Measurement, Sas, Time Series Analysis
Scientific paper
Two separate research projects are described, the first of which was an experimental investigation of cosmic ray hadrons at ground level (atmosphere depth 990 g/sq cm) in the energy range 30 to 1000 GeV. The principal elements of the experimental apparatus were a shallow calorimeter to give a measure of incident energy and a threshold Cerenkov counter to provide velocity information. The second research project described is a study of the time variation of the periodically variable X-ray source Cygnus X-3. Data is presented from observations taken with the SAS-3 satellite in Jan. 1978 which, when combined with earlier data of other observers, indicates that the source's 4.8-hr period P is changing at a rate Dotted P/P = (5.1 + or - 1.3) times 10 to the -6th power/yr.
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