Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: BeppoSAX follow-up search for the X-ray afterglow of GRB970111   The BeppoSAX satellite has recently opened a new way towards the solution of
the long standing gamma-ray bursts' (GRBs) enigma, providing accurate
coordinates few hours after the event thus allowing for multiwavelength
follow-up observational campaigns. The BeppoSAX Narrow Field Instruments
observed the region of sky containing GRB970111 16 hours after the burst. In
contrast to other GRBs observed by BeppoSAX no bright afterglow was
unambiguously observed. A faint source (1SAXJ1528.1+1937) is detected in a
position consistent with the BeppoSAX Wide Field Camera position, but
unconsistent with the IPN annulus. Whether 1SAXJ1528.1+1937 is associated with
GRB970111 or not, the X-ray intensity of the afterglow is significantly lower
than expected, based on the properties of the other BeppoSAX GRB afterglows.
Given that GRB970111 is one of the brightest GRBs observed, this implies that
there is no obvious relation between the GRB gamma-ray peak flux and the
intensity of the X-ray afterglow.

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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-th
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The categories of this paper are: math
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The categories of this paper are: nlin
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The categories of this paper are: hep-ex
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The categories of this paper are: nucl-ex
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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: math-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: stat
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: mtrl-th