Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Galactic survey of 44Ti sources with the IBIS telescope onboard INTEGRAL   We report the results of the deepest Galactic Plane (|b| < 17.5 deg) survey
in the 67.9 and 78.4 keV nuclear de-excitation lines of titanium-44 (44Ti)
performed using the data acquired with the IBIS/ISGRI instrument onboard the
INTEGRAL satellite during 12 years of operation. The peak sensitivity of our
survey reached an unprecedented level of $4.8\times10^{-6}$ erg s$^{-1}$
cm$^{-2}$ (3 sigma) that improves the sensitivity of the survey done by
CGRO/COMPTEL by a factor of ~5. As a result, constraining upper limits for all
sources from the catalog of Galactic supernova remnants (SNRs; Green 2014) are
derived. These upper limits can be used to estimate the exposure needed to
detect 44Ti emission from any known SNR using existing and prospective X- and
gamma-ray telescopes. Among the youngest Galactic SNRs, only Cas A shows
significant 44Ti emission flux in good agreement with the NuSTAR measurements.
We did not detect any other sources of titanium emission in the Galactic Plane
at significance level higher than 5 sigma confirming previous claims of the
rarity of such 44Ti-producing SNRs.

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The categories of this paper are: hep-lat
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The categories of this paper are: math
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The categories of this paper are: hep-th
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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: q-bio
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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: patt-sol
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The categories of this paper are: math-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: plasm-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: econ
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The categories of this paper are: q-alg