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Long-term studies with the Ariel 5 ASM. II - The strong Cygnus sourcesThe three bright 3-6 keV X-ray sources in Cygnus are examined for regular temporal variability with a 1300 day record from the Ariel 5 All-Sky Monitor. The only periods consistently observed are 5.6 days for Cyg X-1, 11.23 days for Cyg X-2, and 4.8 hours for Cyg X-3. The 78.4 day period of Kemp, Herman, and Barbour for Cyg X-1, the 9.843 day period of Cowley, Crampton, and Hutchings for Cyg X-2, and the 16.75 day period of Holt et al. for Cyg X-3 are not confirmed.
Document ID
19800026543
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Holt, S. S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kaluzienski, L. J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Boldt, E. A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Serlemitsos, P. J.
(NASA Goddard Space Flight Center Laboratory for High Energy Astrophysics, Greenbelt, Md., United States)
Date Acquired
August 10, 2013
Publication Date
October 1, 1979
Publication Information
Publication: Astrophysical Journal
Subject Category
Astrophysics
Accession Number
80A10713
Distribution Limits
Public
Copyright
Other

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