SAS-2 High energy gamma-ray observations of the VELA pulsar

Details SAS-2 High energy gamma-ray observations of the VELA pulsar SAS-2 High energy gamma-ray observations of the VELA pulsar

Apr 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975stin...7523421t&link_type=abstract

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Astronomy and Astrophysics

Astronomy

Gamma Rays, Pulsars, Sas, Extremum Values, Luminous Intensity, Radiation, Radio Emission, Radio Telescopes, Supernova Remnants

Scientific paper

The second Small Astronomy Satellite high-energy (35 MeV) gamma-ray telescope detected pulsed gamma-ray emission at the radio period from PSR 0833-45, the Vela pulsar, as well as an unpulsed flux from the Vela region. The pulsed emission consists of two peaks, one following the radio peak by about 13 msec, and the other 0.4 period after the first. The luminosity of the pulsed emission above 100 MeV from Vela is about 0.1 that of the pulsar NP0532 in the Crab nebula, whereas the pulsed emission from Vela at optical wavelengths is less than 0.0004 that from the Crab. The relatively high intensity of the pulsed gamma-ray emission and the double peak structure, compared to the single pulse in the radio emission, suggests that the high energy gamma-ray pulsar emission may be produced under different conditions from those found at lower energies.

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