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A search for quasi-periodic oscillations in 4U/MXB 1735-44A search for quasi-periodic oscillations (QPOs) in 4U/MXB 1735-44 was performed using Exosat observations during which the source was in a horizontal branch of the spectral hardness-intensity diagram for about 8 hr and in a normal branch type of behavior for about 46 hr. No QPOs or low-frequency noise was found in the horizontal branch state. It is suggested that this absence is due to either low luminosity or the fact that the companion in 1735-44 is a main-sequence star.
Document ID
19890054129
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Penninx, Wim (MIT, Cambridge, MA; Amsterdam, Universiteit Netherlands)
Hasinger, Guenther (Max-Planck-Institut fuer extraterrestrische Physik Garching, Federal Republic of Germany, United States)
Lewin, Walter H. G. (MIT Cambridge, MA, United States)
Van Paradijs, Jan (Amsterdam, Universiteit Netherlands)
Van Der Klis, Michiel (EXOSAT Observatory Noordwijk, Netherlands)
Date Acquired
August 14, 2013
Publication Date
May 15, 1989
Publication Information
Publication: Royal Astronomical Society, Monthly Notices
Volume: 238
ISSN: 0035-8711
Subject Category
Astrophysics
Accession Number
89A41500
Funding Number(s)
CONTRACT_GRANT: NSG-7643
CONTRACT_GRANT: NAG8-571
CONTRACT_GRANT: NAG8-674
Distribution Limits
Public
Copyright
Other

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