Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: VERITAS Search for Magnetically-Broadened Emission From Blazars   A non-zero intergalactic magnetic field (IGMF) would potentially produce
detectable effects on cascade emission from blazars. Depending on the strength
of the IGMF, the cascade emission may be time delayed or angularly broadened
compared to the blazar's primary, unscattered emission. Ground-based imaging
atmospheric-Cherenkov telescopes, such as VERITAS, have the precise angular
resolution needed to search for magnetically-broadened emission. We present the
latest VERITAS results on the search for extended gamma-ray emission, based on
observations of a number of strongly-detected TeV blazars at a range of
redshifts. The consequent constraints on the strength of the IGMF are
discussed.

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The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: quant-ph
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The categories of this paper are: nlin
26
The categories of this paper are: bayes-an