Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Swift BAT Look at Super-Orbital X-ray Binaries   We present the results of a study with the Swift Burst Alert Telescope in the
14 - 195 keV range of the long-term variability of 5 low mass X-ray binaries
with reported or suspected super-orbital periods -- 4U 1636-536, 4U 1820-303,
4U 1916-053, Cyg X-2 and Sco X-1. No significant periodic modulation was
detected around the previously reported values in the 4U 1916-053, Cyg X-2 or
Sco X-1 light curves. The $\sim$170 d period of 4U 1820-303 was detected up to
24 keV, consistent with the proposed triple system model. The $\sim$46 d period
in 4U 1636-536 was detected up to 100 keV, clearly inconsistent with variable
photoelectric absorption via a warped precessing disc. We speculate that the
appearance of this modulation after 4U 1636-536 entered the low/hard state
indicates that this variability could be linked to jet precession such as
observed in SS 433.

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The categories of this paper are: hep-th
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
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The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
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The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
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The categories of this paper are: funct-an
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The categories of this paper are: stat
12
The categories of this paper are: nucl-th
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The categories of this paper are: q-bio
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The categories of this paper are: patt-sol
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The categories of this paper are: nlin
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The categories of this paper are: q-fin