Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: X-ray outburst of CI Cam/XTE J0421+560: RXTE observations   We present the results of observations of XTE J0421+560 X-ray transient with
Rossi X-ray Timing Explorer in the beginning of April 1998. Lightcurve,
obtained by ASM all-sky monitor, shows unusually fast decrease in the object's
luminosity. Spectra from series of observations by PCA and HEXTE experiments
were studied in detail. Two emission line regions with energies around 6.5 keV
and around 8 keV have been mentioned in the spectra. The possibility of
generation of the observed emission in relativistic plasma jet has been
discussed. Some analogy is found with known Galactic jet source SS433.

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The categories of this paper are: eess
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The categories of this paper are: cs
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The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: stat
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The categories of this paper are: chao-dyn
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The categories of this paper are: econ
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
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The categories of this paper are: chem-ph
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The categories of this paper are: math-ph
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The categories of this paper are: q-alg
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The categories of this paper are: funct-an