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Observations of the X-ray burst source MXB 1636-53X-ray bursts have been observed from MXB 1636-53, almost certainly associated with the strong steady X-ray source 2S 1636-536 (Norma X-1, 3U 1636-53). The steady source was observed in January 1977 at roughly half the intensity reported in the 3U catalog and showed about 15% variability on a time scale of hours. The spectra of the X-ray bursts are well fitted by blackbody radiation whose temperature rises rapidly to a maximum of approximately 28 million K and then cools slowly. If the source is at a distance of 10 kpc, the radius of the projected burst emission region is about 10 km, similar to the size of a neutron star.
Document ID
19770067741
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hoffman, J. A.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Lewin, W. H. G.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Doty, J.
(MIT Cambridge, Mass., United States)
Date Acquired
August 9, 2013
Publication Date
October 1, 1977
Publication Information
Publication: Astrophysical Journal
Subject Category
Astronomy
Accession Number
77A50593
Funding Number(s)
CONTRACT_GRANT: NAS5-11450
Distribution Limits
Public
Copyright
Other

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