Detailed characteristics of the high-energy gamma radiation from PSR 0833-45 measured by COS-B

Details Detailed characteristics of the high-energy gamma radiation from PSR 0833-45 measured by COS-B Detailed characteristics of the high-energy gamma radiation from PSR 0833-45 measured by COS-B

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....90..163k&link_type=abstract

Astronomy and Astrophysics, vol. 90, no. 1-2, Oct. 1980, p. 163-169. Bundesministerium für Forschung und Technologie

Astronomy and Astrophysics

Astronomy

50

Cos-B Satellite, Gamma Ray Astronomy, Gamma Rays, Pulsars, Radiant Flux Density, Radiation Measurement, Emission Spectra, Light Curve, Periodic Variations, Polynomials, Spectral Energy Distribution, Spectral Resolution, Spectrum Analysis, Temporal Resolution

Scientific paper

A series of COS-B observations of the high-energy gamma-ray emission from PSR 0833-45 has been combined to derive detailed temporal and spectral characteristics of this source. The gamma-ray period of the pulsar was determined for the observations spanning the time interval October 1975 to June 1977. The variation of the period with time can be expressed as a second-order polynomial including a second derivative or as an exponential function describing the post-glitch behavior of the pulsar. The spectrum of PSR 0833-45 can be represented by a power law of index 1.89 plus or minus 0.06 in the energy range 50 MeV to 3 GeV, but indications of a spectral flattening at low energies and a steepening above a few hundred MeV exist. The pulsed components emitted at different pulsar phases show marked spectral differences. No evidence of a steady gamma-ray emission from the direction of PSR 0833-45 was found.

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