Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multiwavelength variability power spectrum analysis of the blazars 3C
  279 and PKS 1510-089 on multiple timescales   We present the results of variability power spectral density (PSD) analysis
using multiwavelength radio to GeV\,$\gamma$-ray light curves covering
decades/years to days/minutes timescales for the blazars 3C 279 and PKS
1510-089. The PSDs are modeled as single power-laws, and the best-fit spectral
shape is derived using the `power spectral response' method. With more than ten
years of data obtained with weekly/daily sampling intervals, most of the PSDs
cover ~2-4 decades in temporal frequency; moreover, in the optical band, the
PSDs cover ~6 decades for 3C 279 due to the availability of intranight light
curves. Our main results are the following: (1) on timescales ranging from
decades to days, the synchrotron and the inverse Compton spectral components,
in general, exhibit red-noise (slope ~2) and flicker-noise (slope ~1) type
variability, respectively; (2) the slopes of $\gamma$-ray variability PSDs
obtained using a 3-hr integration bin and a 3-weeks total duration exhibit a
range between ~1.4 and ~2.0 (mean slope = 1.60$\pm$0.70), consistent within
errors with the slope on longer timescales; (3) comparisons of fractional
variability indicate more power on timescales $\leq$100\, days at $\gamma$-ray
frequencies as compared to longer wavelengths, in general (except between
$\gamma$-ray and optical frequencies for PKS 1510$-$089); (4) the normalization
of intranight optical PSDs for 3C\,279 appears to be a simple extrapolation
from longer timescales, indicating a continuous (single) process driving the
variability at optical wavelengths; (5) the emission at optical/infrared
wavelengths may involve a combination of disk and jet processes for
PKS\,1510$-$089.

20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
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The categories of this paper are: solv-int
9
The categories of this paper are: nlin
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The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
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The categories of this paper are: supr-con
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The categories of this paper are: patt-sol
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The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
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The categories of this paper are: econ