Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Estimating the black hole mass of NGC1313 X-1 based on the spectral and
  timing properties   The discovery of 3:2 quasi-periodic oscillations (QPOs) in the ultraluminous
X-ray source NGC 1313 X-1 suggests it harbors an intermediate-mass black hole
(IMBH). We test this numerically by modelling the 3:2 QPOs and the associated
X-ray spectrum based on the epicyclic resonance model and a disk-corona model
with large-scale magnetic fields generated by the Cosmic Battery mechanism. The
combined QPO-frequency and spectral fitting indicates that the BH mass ranges
from 2524M_sun to 6811M_sun confirming its IMBH nature, and the BH spin is
probably higher than ~0.3.

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The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
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The categories of this paper are: ao-sci
2
The categories of this paper are: math
3
The categories of this paper are: physics
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The categories of this paper are: stat
1
The categories of this paper are: cs
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-th
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The categories of this paper are: adap-org
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The categories of this paper are: q-bio
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
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The categories of this paper are: eess