Geminga pulsar observations with gamma-telescope GAMMA-1

Details Geminga pulsar observations with gamma-telescope GAMMA-1 Geminga pulsar observations with gamma-telescope GAMMA-1

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993adspr..13..739a&link_type=abstract

Advances in Space Research (ISSN 0273-1177), vol. 13, no. 12, p. (12)739-(12)742

Astronomy and Astrophysics

Astronomy

Energy Spectra, Gamma Ray Astronomy, Light Curve, Phase Diagrams, Statistical Analysis, Astronomical Satellites, Cos-B Satellite, Gamma Ray Telescopes

Scientific paper

The Geminga light curve obtained with the 'Gamma-1' telescope features two peaks separated by 0.5 +/- 0.03 period. The light curve is pronounced for gamma-quanta energies higher than 400 MeV. The pulsed flux upper limit (1 sigma) in the energy interval 50 - 300 MeV is 6 x 10-7((sq cm)(sec)). For energies greater than 300 MeV the pulsed component power law spectrum has an exponent 1.1-0.3+1.1 and an integral flux (1.1 +/- 0.3) x 10-6/((sq cm)(sec)). The Geminga gamma-ray source was a secondary target of the 'Gamma-1' telescope in the period from 30 Nov 1990 to 2 Feb 1991. A total exposure (after taking into account the dead tme of the telescope) was 508824 s.

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