Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for the time evolution of the synchrotron X-ray spectrum of the
  youngest Galactic supernova remnant G1.9+0.3 using Suzaku   G1.9+0.3 is the youngest known Galactic supernova remnant (SNR) and dominated
by X-ray synchrotron emission. Synchrotron X-rays can be a useful tool to study
the electron acceleration in young SNRs. The X-ray spectra of young SNRs give
us information about the particle acceleration at the early stages of evolution
of SNRs. In this work, we investigate the time evolution of roll-off frequency
of the synchrotron spectrum from SNR G1.9+0.3 using Suzaku. For this analysis,
we use ~101 ks (2011) and ~92 ks (2015) observations with the X-ray Imaging
Spectrometer. We find that there are no significant differences in the spectral
parameters and interpret our results.

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The categories of this paper are: gr-qc
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The categories of this paper are: econ
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The categories of this paper are: patt-sol
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The categories of this paper are: comp-gas
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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-th
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The categories of this paper are: q-bio
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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: cs
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The categories of this paper are: math-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: bayes-an