High energy X-ray observations of the 38-second pulsar
Author(s) -
P. F. Byrne,
A. M. Levine,
M. Bautz,
S. K. Howe,
F. L. Lang,
F. A. Primini,
W. H. G. Lewin,
D. E. Gruber,
F. K. Knight,
P. L. Nolan
Publication year - 1981
Publication title -
the astrophysical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.376
H-Index - 489
eISSN - 1538-4357
pISSN - 0004-637X
DOI - 10.1086/158988
Subject(s) - pulsar , physics , astrophysics , astronomy , energy spectrum , x ray pulsar , stars , spectral line
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.
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