Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Sixteen years of X-ray monitoring of Sagittarius A*: Evidence for a
  decay of the faint flaring rate from 2013 August, 13 months before a rise in
  the bright flaring rate   Recently, in a study the X-ray flaring activity of Sgr A* with Chandra and
XMM-Newton public observations from 1999 to 2014 and 2014 Swift data, it has
been argued that the "bright and very bright" flaring rate raised from 2014
Aug. 31. Thanks to 482ks of observations performed in 2015 with Chandra,
XMM-Newton and Swift, we test the significance of this rise of flaring rate and
determine the threshold of unabsorbed flare flux or fluence leading to any
flaring-rate change. The mean unabsorbed fluxes of the 107 flares detected in
the 1999-2015 observations are consistently computed from the extracted spectra
and calibration files, assuming the same spectral parameters. We construct the
observed flare fluxes and durations distribution for the XMM-Newton and Chandra
flares and correct it from the detection biases to estimate the intrinsic
distribution from which we determine the average flare detection efficiency for
each observation. We apply the BB algorithm on the flare arrival times
corrected from the corresponding efficiency. We confirm a constant overall
flaring rate in 1999-2015 and a rise in the flaring rate for the most
luminous/energetic flares from 2014 Aug. 31 (4 months after the passage of the
DSO/G2 close to Sgr A*). We also identify a decay of the flaring rate for the
less luminous and less energetic flares from 2013 Aug. and Nov., respectively
(10 and 7 months before the pericenter of the DSO/G2). The decay of the faint
flaring rate is difficult to explain by the tidal disruption of the DSO/G2,
whose stellar nature is now well established, since it occurred well before its
pericenter. Moreover, a mass transfer from the DSO/G2 to Sgr A* is not required
to produce the rise in the bright flaring rate since the energy saved by the
decay of the number of faint flares during a long time period may be later
released by several bright flares during a shorter time period. (abridged)

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The categories of this paper are: hep-lat
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The categories of this paper are: quant-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: acc-phys
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The categories of this paper are: math-ph
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The categories of this paper are: eess
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The categories of this paper are: bayes-an
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The categories of this paper are: q-bio
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The categories of this paper are: supr-con
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The categories of this paper are: hep-ph
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The categories of this paper are: nlin
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The categories of this paper are: q-alg
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The categories of this paper are: stat
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The categories of this paper are: solv-int
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The categories of this paper are: cond-mat
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The categories of this paper are: comp-gas