Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: XMM-Newton observations of the supernova remnant RX J0852.0-4622/GRO
  J0852-4642   RX J0852.0-4622 is a shell type supernova remnant with a power law spectrum
in the south-eastern corner of the Vela supernova remnant. We report XMM-Newton
observations of three fields centered on the rim of the remnant and confirm the
power law shape of the spectra with no prominent emission lines as previously
obtained with ASCA. The emission line feature at ~4.1 keV indicated in the
ASCA/SIS spectrum of the northern field is detected and found in the southern
and western fields, as well, with a total significance of slightly more than 4
sigmas. The line position is improved and the feature is centered on 4.45 +/-
0.05 keV. We suggest this line feature to be emission from Ti and Sc. The
measured X-ray flux is consistent with the Ti gamma-ray flux previously
measured with COMPTEL. We discuss various physical processes which may lead to
the creation of these lines, and we discuss the implications for the progenitor
and the supernova type.

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The categories of this paper are: q-fin
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The categories of this paper are: funct-an
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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
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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: nucl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: cs
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The categories of this paper are: math
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The categories of this paper are: quant-ph
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The categories of this paper are: q-bio
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The categories of this paper are: solv-int
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The categories of this paper are: cond-mat