Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...246..951b&link_type=abstract
Astrophysical Journal, Part 1, vol. 246, June 15, 1981, p. 951-954.
Astronomy and Astrophysics
Astronomy
10
Binary Stars, Pulsars, X Ray Sources, Heao 1, Position (Location), Pulse Duration, Spaceborne Astronomy, Stellar Spectra
Scientific paper
The results of observations of the 38-second pulsar obtained at high X-ray energies (13-180 keV) with the UCSD/MIT instrument aboard HEAO 1 are reported. The results include a measurement of the source location, measurement of the pulse profile, and determination of the average intensity and spectrum during each of three time intervals spanning a baseline of 1 year. The total intensity of the pulsar is seen to vary on a 6-month time scale. The spectrum is hard but, like other X-ray pulsars, steepens at energies above 20 keV.
Bautz Marshall
Byrne P. F.
Gruber Duane E.
Howe S. K.
Knight Frederick K.
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