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High energy X-ray observations of the 38-second pulsarThe 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.
Document ID
19810055403
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1086/158988
Authors
Byrne, P. F. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Levine, A. M. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Bautz, M. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Howe, S. K. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Lang, F. L. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Primini, F. A. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Lewin, W. H. G. (MIT Cambridge, MA, United States)
Gruber, D. E. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Knight, F. K. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Nolan, P. L. (California, University La Jolla, CA, United States)
Date Acquired
August 11, 2013
Publication Date
June 15, 1981
Publication Information
Publication: Astrophysical Journal
Subject Category
Astronomy
Accession Number
81A39807
Funding Number(s)
CONTRACT_GRANT: NAS8-27974
CONTRACT_GRANT: NAS8-27975
Distribution Limits
Public
Copyright
Other

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