Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: First LOFAR Observations of Gamma-Ray Binaries   A few binary systems display High Energy (100 MeV - 100 GeV) and/or Very High
Energy (> 100 GeV) gamma-ray emission. These systems also display non-thermal
radio emission that can be resolved with long-baseline radio interferometers,
revealing the presence of outflows. It is expected that at very low frequencies
the synchrotron radio emission covers larger angular scales than has been
reported up to now. Here we present preliminary results of the first deep radio
observations of the gamma-ray binary LS I +61 303 with LOFAR, which is
sensitive to extended structures on arcsecond to arcminute scales.

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The categories of this paper are: alg-geom
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The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con
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The categories of this paper are: hep-th
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The categories of this paper are: cond-mat
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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: bayes-an
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The categories of this paper are: patt-sol
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The categories of this paper are: math-ph
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The categories of this paper are: eess
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The categories of this paper are: adap-org
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The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-lat