Modeling the time variable spectral energy distribution of the blazar CTA 102 from 2008 to 2022

Abstract

We present long-term multiwavelength observations of blazar CTA 102 ($z=1.037$). Detailed temporal and spectral analyses of $\gamma$-ray, X-ray and UV/optical data observed by {\it Fermi}-LAT, Swift XRT, NuSTAR and Swift-UVOT over a period of 14 years, between August 2008 and March 2022, was performed. We found strong variability of source emission in all the considered bands, especially in the $\gamma$-ray band it exhibited extreme outbursts when the flux crossed the level of $10^{-5}\mathrm{photon}\mathrm{c}{\mathrm{m}}^{-2}{\mathrm{s}}^{-1}$. Using the Bayesian Blocks algorithm, we split the adaptively binned $\gamma$-ray light curve into 347 intervals of quiescent and flaring episodes and for each period built corresponding multiwavelength spectral energy distributions (SEDs), using the available data. Among the considered SEDs, 117 high-quality (quasi) contemporaneous SEDs which have sufficient multiwavelength data, were modeled using JetSeT framework within a one-zone leptonic synchrotron and inverse Compton emission scenario assuming the emitting region is within the broad-line-region and considering internal and external seed photons for the inverse Compton up-scattering. As a result of modeling, the characteristics of the relativistic electron distribution in the jet as well as jet properties are retrieved and their variation in time is investigated. The applied model can adequately explain the assembled SEDs and the modelling shows that the data in the bright flaring periods can be reproduced for high Doppler boosting and magnetic field. The obtained results are discussed in the context of particle cooling in the emitting region.

arXiv commentAccepted for publication in MNRAS; doi.org/10.1093/mnras/stac2875

References in corpus (76)

• Unified Schemes for Radio-Loud Active Galactic Nuclei
• The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
• The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission
• First Results from the Catalina Real-time Transient Survey
• The All-Sky Automated Survey for Supernovae (ASAS-SN) Light Curve Server v1.0
• Multi-messenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A
• Neutrino emission from the direction of the blazar TXS 0506+056 prior to the IceCube-170922A alert
• The Spectral Energy Distribution of Fermi bright blazars
• Leptonic and Hadronic Modeling of Fermi-Detected Blazars
• Relativistic Reconnection: an Efficient Source of Non-Thermal Particles
• Active Galactic Nuclei: what's in a name?
• Studies in Astronomical Time Series Analysis. VI. Bayesian Block Representations
• The Connection between X-ray- and Radio-Selected BL Lacertae Objects
• Incremental Fermi Large Area Telescope Fourth Source Catalog
• BL Lac Objects in the Synchrotron Proton Blazar Model
• Particle acceleration in relativistic collisionless shocks: Fermi process at last?
• Fast TeV variability in blazars: jets in a jet
• Canonical high power blazars
• A Proton Synchrotron Blazar Model for Flaring in Markarian~501
• Comptonization of Infrared Radiation from Hot Dust by Relativistic Jets in Quasars
• Constraining Emission Models of Luminous Blazar Sources
• The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
• The Generation of Nonthermal Particles in the Relativistic Magnetic Reconnection of Pair Plasmas
• A Multimessenger Picture of the Flaring Blazar TXS 0506+056: implications for High-Energy Neutrino Emission and Cosmic Ray Acceleration
• Swift observations of the very intense flaring activity of Mrk 421 during 2006: I. Phenomenological picture of electron acceleration and predictions for the MeV/GeV emission
• Multiwavelength Evidence for Quasi-periodic Modulation in the Gamma-ray Blazar PG 1553+113
• Stochastic Acceleration and the Evolution of Spectral Distributions in SSC Sources: A Self Consistent Modeling of Blazars' Flares
• The blazar TXS 0506+056 associated with a high-energy neutrino: insights into extragalactic jets and cosmic ray acceleration
• Log-parabolic spectra and particle acceleration in blazars. III: SSC emission in the TeV band from Mkn 501
• Modelling the coincident observation of a high-energy neutrino and a bright blazar flare
• Lepto-hadronic single-zone models for the electromagnetic and neutrino emission of TXS 0506+056
• Blazar spectral variability as explained by a twisting inhomogeneous jet
• Dissecting the region around IceCube-170922A: the blazar TXS 0506+056 as the first cosmic neutrino source
• Blazar Flares as an Origin of High-Energy Cosmic Neutrinos?
• Fast TeV variability from misaligned minijets in the jet of M87
• Diffusive Acceleration of Particles at Oblique, Relativistic, Magnetohydrodynamic Shocks
• Characterizing the Gamma-Ray Variability of the Brightest Flat Spectrum Radio Quasars Observed with the Fermi LAT
• An adaptive-binning method for generating constant-uncertainty/constant-significance light curves with Fermi-LAT data
• Bethe-Heitler emission in BL Lacs: filling the gap between X-rays and $\gamma$-rays
• Hubble Space Telescope ultraviolet spectroscopy of blazars: emission lines properties and black hole masses
• Probing Acceleration and Turbulence at Relativistic Shocks in Blazar Jets
• Lepto-hadronic $\gamma$-ray and neutrino emission from the jet of TXS 0506+056
• A multi-wavelength polarimetric study of the blazar CTA 102 during a Gamma-ray flare in 2012
• Constraining the location of rapid gamma-ray flares in the FSRQ 3C 273
• Probing Blazar Emission Processes with Optical/Gamma-ray Flare Correlations
• X-ray spectra, light-curves and SEDs of blazars frequently observed by Swift
• Fermi-LAT Observations of the 2014 May-July outburst from 3C 454.3
• Time-dependent lepto-hadronic modeling of the emission from blazar jets with SOPRANO: the case of TXS 0506+056, 3HSP J095507.9+355101 and 3C 279
• Constraints on the emission region of 3C 279 during strong flares in 2014 and 2015 through VHE gamma-ray observations with H.E.S.S
• On the multi-wavelength Emission from CTA 102
• Fermi-LAT Observation of Non-Blazar AGNs
• Rapid Gamma-ray variability of NGC 1275
• The magnetic field structure in CTA 102 from high resolution mm-VLBI observations during the flaring state in 2016-2017
• Cloud ablation by a relativistic jet and the extended flare in CTA 102 in 2016 and 2017
• A thirteen-year-long broadband view of BL Lac
• The first hard X-ray spectral catalogue of Blazars observed by NuSTAR
• Flare-like Variability of the Mg~II $\lambda$2798 Å Emission Line and UV Fe~II band in the Blazar CTA~102
• Fermi-Large Area Telescope observations of the brightest Gamma-ray flare ever detected from CTA 102
• A multiwavelength view of BL Lacs neutrino candidates
• Multiwavelength Study of High-Redshift Blazars
• Investigating the multiwavelength behaviour of the flat spectrum radio quasar CTA 102 during 2013-2017
• Comparing 3C 120 jet emission at small and large scales
• Locating the gamma-ray emission region in the brightest Fermi-LAT Flat Spectrum Radio Quasars
• Correlation between optical and $\gamma$-ray flux variations in bright flat spectrum radio quasars
• High Energy Gamma-Ray Emission From PKS 1441+25
• The Origin of the Multiwavelength Emission of PKS 0502+049
• CTA 102 in exceptionally high state during 2016-17
• Modeling the Broadband Emission of 3C 454.3
• The extended flare in CTA 102 in 2016 and 2017 within a hadronic model through cloud ablation by the relativistic jet
• Multiwavelength Study of the Quiescent States of Six Brightest Flat Spectrum Radio Quasars detected by Fermi-LAT
• Imaging and variability studies of CTA~102 during the 2016 January $\gamma$-ray flare
• Electron Acceleration In Blazars: Application to the 3C 279 Flare on 2013 December 20
• The strange case of the transient HBL blazar 4FGL J1544.3-0649
• Investigation of the Gamma-ray Spectrum of CTA 102 During the Exceptional Flaring State in 2016-2017
• Magnetic Field Strengths of the Synchrotron Self-Absorption Region in the Jet of CTA 102 During Radio Flares
• Physical Inference from the gamma-ray, X-Ray and Optical Time Variability of a Large Sample of Fermi Blazars

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