Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The multiwavelength counterparts of fast radio bursts   The engines that produce extragalactic fast radio bursts (FRBs), and the
mechanism by which the emission is generated, remain unknown. Many FRB models
predict prompt multi-wavelength counterparts, which can be used to refine our
knowledge of these fundamentals of the FRB phenomenon. However, several
previous targeted searches for prompt FRB counterparts have yielded no
detections, and have additionally not reached sufficient sensitivity with
respect to the predictions. In this work, we demonstrate a technique to
estimate the ratio, $\eta$, between the energy outputs of FRB counterparts at
various wavelengths and the radio-wavelength emission. Our technique combines
the fluence distribution of the FRB population with results from several
wide-field blind surveys for fast transients from the optical to the TeV bands.
We present constraints on $\eta$ that improve upon previous observations even
in the case that all unclassified transient events in existing surveys are FRB
counterparts. In some scenarios for the FRB engine and emission mechanism, we
find that FRB counterparts should have already been detected, thus
demonstrating that our technique can successfully test predictions for $\eta$.
However, it is possible that FRB counterparts are lurking amongst catalogs of
unclassified transient events. Although our technique is robust to the present
uncertainty in the FRB fluence distribution, its ultimate application to
accurately estimate or bound $\eta$ will require the careful analysis of all
candidate fast-transient events in multi-wavelength survey data sets.

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The categories of this paper are: q-alg
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The categories of this paper are: eess
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The categories of this paper are: comp-gas
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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: atom-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: gr-qc
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The categories of this paper are: quant-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: nlin