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Vela X-1 pulse timing. II - Variations in pulse frequencyThe pulsed X-ray emission of Vela X-1 during May 1978 and December-January 1978-1979 is investigated analytically on the basis of published satellite observations. The data are compiled in tables and graphs and discussed in detail, with reference to data for the entire 1975-1982 period. Variations in pulse frequency are identified on time scales from 2 to 2600 days; the lower nine octaves are characterized as white noise (or random walk in pulse frequency), while the longer-period variations are attributed to changes in neutron-star rotation rates.
Document ID
19890035332
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1086/167017
Authors
Deeter, J. E. (Washington Univ. Seattle, WA, United States)
Boynton, P. E. (Washington, University Seattle, United States)
Lamb, F. K. (Washington Univ. Seattle, WA, United States)
Zylstra, G. (Illinois, University Urbana, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 336
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
89A22703
Funding Number(s)
CONTRACT_GRANT: NSF PHY-86-00377
CONTRACT_GRANT: NSF PHY-78-04404
CONTRACT_GRANT: NSF PHY-81-18387
CONTRACT_GRANT: NSF AST-80-01471
CONTRACT_GRANT: NAG8-608
CONTRACT_GRANT: NAS8-33360
CONTRACT_GRANT: NSF PHY-80-25605
CONTRACT_GRANT: NAGW-1133
CONTRACT_GRANT: NSF AST-82-16661
CONTRACT_GRANT: NSG-7653
Distribution Limits
Public
Copyright
Other

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