Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: First simultaneous multi-wavelength observations of the black hole
  candidate IGR J17091-3624: ATCA, INTEGRAL, Swift, and RXTE views of the 2011
  outburst   We present the results of the first four (quasi-)simultaneous radio (ATCA),
X-ray (Swift, RXTE), and Gamma-ray (INTEGRAL) observations of the black hole
candidate IGR J17091-3624, performed in February and March 2011. The X-ray
analysis shows that the source was in the hard state, and then it transited to
a soft intermediate state. We study the correlated radio/X-ray behaviour of
this source for the first time. The radio counterpart to IGR J17091-3624 was
detected during all four observations with the ATCA. In the hard state, the
radio spectrum is typical of optically thick synchrotron emission from a
self-absorbed compact jet. In the soft intermediate state, the detection of
optically thin synchrotron emission is probably due to a discrete ejection
event associated with the state transition. The position of IGR J17091-3624 in
the radio versus X-ray luminosity diagram (aka fundamental plane) is compatible
with that of the other black hole sources for distances greater than 11 kpc.
IGR J17091-3624 also appears as a new member of the few sources that show a
strong quenching of radio emission after the state transition. Using the
estimated luminosity at the spectral transition from the hard state, and for a
typical mass of 10 M_sun, we estimate a distance to the source between ~11 and
~17 kpc, compatible with the radio behaviour of the source.

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The categories of this paper are: econ
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The categories of this paper are: chao-dyn
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The categories of this paper are: stat
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The categories of this paper are: math-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: cs
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The categories of this paper are: alg-geom
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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: cmp-lg
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The categories of this paper are: nlin
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The categories of this paper are: hep-ex
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The categories of this paper are: solv-int
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The categories of this paper are: q-fin
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The categories of this paper are: hep-lat
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The categories of this paper are: funct-an