Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The complete Z-diagram of LMC X-2   We present results from four Rossi X-ray Timing Explorer (RXTE) observations
of the bright low mass X-ray binary LMC X-2. During these observations, which
span a year and include over 160 hrs of data, the source exhibits clear
evolution through three branches on its hardness-intensity and color-color
diagrams, consistent with the flaring, normal, and horizontal branches (FB, NB,
HB) of a Z-source, and remarkably similar to Z-tracks derived for GX 17+2, Sco
X-1 and GX 349+2. LMC X-2 was observed in the FB, NB, and HB for roughly 30%,
40%, and 30% respectively of the total time covered. The source traces out the
full extent of the Z in ~1 day, and the Z-track shows evidence for secular
shifts on a timescale in excess of a few days. Although the count rate of LMC
X-2 is low compared with the other known Z-sources due to its greater distance,
the power density spectra selected by branch show very-low-frequency noise
characteristics at least consistent with those from other Z-sources. We thus
confirm the identification of LMC X-2 as a Z-source, the first identified
outside our Galaxy.

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The categories of this paper are: supr-con
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The categories of this paper are: q-alg
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The categories of this paper are: ao-sci
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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: acc-phys
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-th
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ph
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The categories of this paper are: eess
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The categories of this paper are: econ
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The categories of this paper are: physics
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The categories of this paper are: cond-mat
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The categories of this paper are: q-bio