High-energy gamma-ray light curve of PSR0531+21

Details High-energy gamma-ray light curve of PSR0531+21 High-energy gamma-ray light curve of PSR0531+21

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982natur.296..723w&link_type=abstract

Nature, vol. 296, Apr. 22, 1982, p. 723-726.

Astronomy and Astrophysics

Astronomy

39

Gamma Rays, Light Curve, Pulsars, Cos-B Satellite, Crab Nebula, Energy Spectra

Scientific paper

The Crab pulsar was selected as the first object of detailed study by ESA's gamma-ray astronomy satellite COS B, whose first six years of operations have yielded five 30-40 day duration observations in which the pulsar was within 15 deg of the field of view center. The first of the observations confirmed the SAS2 experiment result that the gamma-ray light curve for energies above a few tens of MeV consisted of two equally strong peaks, although subsequent measurements found a decrease in the strength of the second peak relative to the first. The simultaneously measured 2-12 keV X-ray light curve showed no change. The five observations offer the first evidence of interpulse emission between two peaks in the 50-3000 MeV energy range.

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