Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Using Gamma Ray Monitoring to Avoid Missing the Next Milky Way Type Ia
  Supernova   A Milky-Way Type Ia Supernova (SNIa) could be unidentified or even initially
unnoticed, being dim in radio, X-rays, and neutrinos, and suffering large
optical/IR extinction in the Galactic plane. But SNIa emit nuclear gamma-ray
lines from $^{56}{\rm Ni}\to ^{56}{\rm Co}\to ^{56}{\rm Fe}$ radioactive
decays. These lines fall within the Fermi/GBM energy range, and the $^{56}{\rm
Ni}$ 158 keV line is detectable by Swift/BAT. Both instruments frequently
monitor the Galactic plane, which is transparent to gamma rays. Thus GBM and
BAT are ideal Galactic SNIa early warning systems. We simulate SNIa MeV light
curves and spectra to show that GBM and BAT could confirm a Galactic SNIa
explosion, followed by Swift localization and observation in X-rays and UVOIR
band. The time of detection depends sensitively on the $^{56}{\rm Ni}$
distribution, and can be as early as a few days if $\gtrsim$ 10% of the
$^{56}{\rm Ni}$ is present in the surface as suggested by SN2014J gamma data.

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The categories of this paper are: mtrl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph
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The categories of this paper are: cs
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The categories of this paper are: solv-int
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The categories of this paper are: q-bio
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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: hep-lat
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The categories of this paper are: nlin
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The categories of this paper are: hep-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: ao-sci
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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn