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@ARTICLE{Roy:459746,
author = {Roy, Abhradeep and Patel, Sonal Ramesh and Sarkar, A. and
Chatterjee, A. and Chitnis, V. R.},
title = {{M}ultiwavelength {S}tudy of the {Q}uiescent {S}tates of
{S}ix {B}rightest {F}lat {S}pectrum {R}adio {Q}uasars
detected by {F}ermi-{LAT}},
journal = {Monthly notices of the Royal Astronomical Society},
volume = {504},
number = {1},
issn = {1365-2966},
address = {Oxford},
publisher = {Oxford Univ. Press},
reportid = {PUBDB-2021-02719, arXiv:2104.08566},
pages = {1103 - 1114},
year = {2021},
note = {© 2021 The Author(s) Published by Oxford University Press
on behalf of Royal Astronomical Society13 pages, 7 figures.
Accepted in MNRAS},
abstract = {The regular monitoring of flat-spectrum radio quasars
(FSRQs) in γ-rays by Fermi-LAT (Large Area Telescope) since
past 12 yr indicated six sources who exhibited extreme
γ-ray outbursts crossing daily flux of 10$^{−5}$ photons
cm$^{^−2}$ s$^{−1}$. We obtained nearly simultaneous
multiwavelength data of these sources in radio to γ-ray
waveband from OVRO (Owens Valley Radio Observatory), Steward
Observatory, SMARTS (Small and Moderate Aperture Research
Telescope System), Swift-UVOT (UV/Optical Telescope),
Swift-XRT (X-ray Telescope), and Fermi-LAT. The
time-averaged broad-band spectral energy distributions
(SEDs) of these sources in quiescent states were studied to
get an idea about the underlying baseline radiation
processes. We modelled the SEDs using one-zone leptonic
synchrotron and inverse Compton emission scenario from
broken power-law electron energy distribution inside a
spherical plasma blob, relativistically moving down a
conical jet. The model takes into account inverse Compton
scattering of externally and locally originated seed photons
in the jet. The big blue bumps visible in quiescent state
SEDs helped to estimate the accretion disc luminosities and
central black hole masses. We found a correlation between
the magnetic field inside the emission region and the ratio
of emission region distance to disc luminosity, which
implies that the magnetic field decreases with an increase
in emission region distance and decrease in disc luminosity,
suggesting a disc–jet connection. The high-energy index of
the electron distribution was also found to be correlated
with observed γ-ray luminosity as γ-rays are produced by
high-energy particles. In most cases, kinetic power carried
by electrons can account for jet radiation power as jets
become radiatively inefficient during quiescent states.},
keywords = {radiation mechanisms: non-thermal (autogen) / galaxies:
active (autogen) / galaxies: individual: 3C 273, 3C 279, 3C
454.3, CTA 102, PKS 1510−089, PKS B1222+216 (autogen) /
galaxies: jets (autogen)},
cin = {ZEU-CTA},
ddc = {520},
cid = {I:(DE-H253)ZEU-CTA-20120731},
pnm = {613 - Matter and Radiation from the Universe (POF4-613)},
pid = {G:(DE-HGF)POF4-613},
experiment = {EXP:(DE-H253)CTA-20150101 / EXP:(DE-H253)Fermi-20170101},
typ = {PUB:(DE-HGF)16},
eprint = {2104.08566},
howpublished = {arXiv:2104.08566},
archivePrefix = {arXiv},
SLACcitation = {$\%\%CITATION$ = $arXiv:2104.08566;\%\%$},
UT = {WOS:000656137100079},
doi = {10.1093/mnras/stab975},
url = {https://bib-pubdb1.desy.de/record/459746},
}