Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Magnetar Flare in the BATSE Catalog?   To identify extragalactic magnetar flares, we have searched for their
periodic tails by generating Lomb periodograms of the emission following short
bursts detected by the Burst and Transient Source Experiment (BATSE). Out of
358 short bursts examined, one has a significant tail periodicity (T = 13.8 s,
P = 4 x 10^-5). The most probable host galaxy for this burst is "The Fireworks
Galaxy" NGC 6946 (d = 5.9 Mpc). At this distance, the energy of the spike, (2.7
+/- 0.3) x 10^44 ergs, is akin to those of the galactic magnetar giant flares,
as are its duration (~ 0.4 s) and temperature (250 +/- 60 keV). For the tail
emission, however, our estimated temperature of 60 +/- 5 keV is harder and the
energy release of (4.3 +/- 0.8) x 10^45 ergs is larger than those of the
galactic magnetar flares. Regardless of the host, such a large ratio of
tail-to-spike energy would imply that magnetar flare tails might be detectable
out to further distances than previously thought.

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The categories of this paper are: cs
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
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The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
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The categories of this paper are: q-alg
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The categories of this paper are: comp-gas
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-th
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The categories of this paper are: hep-ex
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The categories of this paper are: math
32
The categories of this paper are: atom-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: solv-int
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The categories of this paper are: ao-sci