Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: GW151226: Observation of Gravitational Waves from a 22-Solar-Mass Binary
  Black Hole Coalescence   We report the observation of a gravitational-wave signal produced by the
coalescence of two stellar-mass black holes. The signal, GW151226, was observed
by the twin detectors of the Laser Interferometer Gravitational-Wave
Observatory (LIGO) on December 26, 2015 at 03:38:53 UTC. The signal was
initially identified within 70 s by an online matched-filter search targeting
binary coalescences. Subsequent off-line analyses recovered GW151226 with a
network signal-to-noise ratio of 13 and a significance greater than 5 $\sigma$.
The signal persisted in the LIGO frequency band for approximately 1 s,
increasing in frequency and amplitude over about 55 cycles from 35 to 450 Hz,
and reached a peak gravitational strain of $3.4_{-0.9}^{+0.7} \times 10^{-22}$.
The inferred source-frame initial black hole masses are $14.2_{-3.7}^{+8.3}
M_{\odot}$ and $7.5_{-2.3}^{+2.3} M_{\odot}$ and the final black hole mass is
$20.8_{-1.7}^{+6.1} M_{\odot}$. We find that at least one of the component
black holes has spin greater than 0.2. This source is located at a luminosity
distance of $440_{-190}^{+180}$ Mpc corresponding to a redshift
$0.09_{-0.04}^{+0.03}$. All uncertainties define a 90 % credible interval. This
second gravitational-wave observation provides improved constraints on stellar
populations and on deviations from general relativity.

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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: comp-gas
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The categories of this paper are: chem-ph
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The categories of this paper are: econ
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The categories of this paper are: alg-geom
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The categories of this paper are: stat
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The categories of this paper are: q-alg
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The categories of this paper are: funct-an
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The categories of this paper are: nlin
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The categories of this paper are: supr-con
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The categories of this paper are: quant-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: cmp-lg