Observability of gamma-ray pulsars

Astronomy and Astrophysics – Astronomy

Scientific paper

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Energy Spectra, Gamma Ray Astronomy, Pulsars, Angular Resolution, Astronomical Models, Doppler Effect, Neutron Stars, Positrons, Radio Sources (Astronomy), Stellar Rotation

Scientific paper

Attention is given to the Crab (PSR 0531 plus 21) and Vela (PSR 0833 minus 45) pulsars in a study of pulsed energy release in the gamma-ray channel; with a gamma-ray/radio luminosity ratio on the order of one million. SAS 2 and COS B data are analyzed in an attempt to detect possible gamma-ray emission from other known radio pulsars. A phenomenological approach is employed, whereby gamma photons are expressed as a fraction of the rotational energy. An efficiency parameter is also introduced in order to take rotational energy loss rate (due to a variety of factors, e.g., period, magnetic field, and the energy of emitting particles) into account.

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