Gamma-Ray Flares in Long Term Light Curve of 3C 454.3

Abstract

3C 454.3 is frequently observed in flaring state. The long term light curve of this source has been analysed with 9 year (August 2008 - July 2017) data from Fermi LAT detector. We have identified five flares and one quiescent state. The flares have sub-structures with many peaks during flaring phase. We have estimated the rise and decay time of the flares and compared with flares of other similar sources. The modeling of gamma ray spectral energy distributions shows in most cases Log parabola function gives the best fit to the data. We have done time dependent leptonic modeling of two of the flares, for which simultaneous multi-wavelength data are available. These two long lasting flares Flare-2A and Flare-2D continued for 95 days and 133 days respectively. We have used the average values of Doppler factor, injected luminosity in electrons, size of the emission region and the magnetic field in the emission region in modeling these flares. The emission region is assumed to be in the broad line region in our single zone model. The energy losses (synchrotron, synchrotron self-Compton, external Compton) and escape of electrons from the emission region have been included while doing the modelling. Although, the total jet powers required to model these flares with leptonic model are higher compared to other sources, they are always found to be lower than the Eddington's luminosity of 3C 454.3. We also select some flaring peaks and show that time variation of the Doppler factor or the injected luminosity in electrons over short time scales can explain their light curves.

arXiv comment51 pages, 55 figures, 34 tables, Accepted for Publication in ApJS

References in corpus (46)

• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
• The Swift X-ray Telescope
• The Swift Ultra-Violet/Optical Telescope
• The Spectral Energy Distribution of Fermi bright blazars
• Canonical high power blazars
• Log-parabolic spectra and particle acceleration in the BL Lac object Mkn 421: spectral analysis of the complete BeppoSAX wide band X-ray data set
• Gamma-ray Light Curves and Variability of Bright Fermi-Detected Blazars
• Spectral Properties of Bright Fermi-detected Blazars in the Gamma-ray Band
• A Tight Connection between Gamma-Ray Outbursts and Parsec-Scale Jet Activity in the Quasar 3C 454.3
• The unprecedented optical outburst of the quasar 3C 454.3. The WEBT campaign of 2004-2005
• Early Fermi Gamma-ray Space Telescope Observations of the Quasar 3C 454.3
• On the masses of black-holes in radio-loud quasars
• The gamma-ray brightest days of the blazar 3C 454.3
• Swift and infra-red observations of the blazar 3C~454.3 during the giant X-ray flare of May 2005
• Correlated variability in the blazar 3C 454.3
• On the Spectral Break in the Fermi-LAT Spectrum of 3C 454.3
• The brightest gamma-ray flaring blazar in the sky: AGILE and multi-wavelength observations of 3C 454.3 during November 2010
• Multiwavelength Variations of 3C 454.3 during the November 2010 to January 2011 Outburst
• Multiwavelength observations of 3C 454.3. I. The AGILE 2007 November campaign on the "Crazy Diamond"
• Gamma-ray blazars near equipartition and the origin of the GeV spectral break in 3C 454.3
• The long-lasting activity of 3C 454.3. GASP-WEBT and satellite observations in 2008-2010
• Multiwavelength Variability of the Blazars Mrk 421 and 3C 454.3 in the High-State
• The high activity of 3C 454.3 in autumn 2007. Monitoring by the WEBT during the AGILE detection
• Exceptional outburst of the blazar CTA 102 in 2012: The GASP-WEBT campaign and its extension
• Star-Jet Interactions and Gamma-Ray Outbursts from 3C454.3
• Fermi-LAT Observations of the 2014 May-July outburst from 3C 454.3
• Fermi-Large Area Telescope Observations of the Exceptional Gamma-ray Flare from 3C 279 in 2015 June
• Multiwavelength observations of 3C 454.3 II. The AGILE 2007 December campaign
• Time-Dependent Modeling of Gamma-ray Flares in Blazar PKS1510-089
• A peculiar multi-wavelength flare in the Blazar 3C 454.3
• Long term variability and correlation study of the blazar 3C 454.3 in radio, NIR and optical wavebands
• Clues on High Energy Emission Mechanism from Blazar 3C 454.3 during 2015 August Flare
• Temporal correlation between the optical and γ-ray flux variations in the blazar 3C 454.3
• Long term study of the light curve of PKS 1510-089 in GeV energies
• Fermi-Large Area Telescope observations of the brightest Gamma-ray flare ever detected from CTA 102
• On the spectral curvature of VHE blazar 1ES\,1011+496: Effect of spatial particle diffusion
• The June 2016 Optical and Gamma-Ray Outburst and Optical Micro-Variability of the Blazar 3C454.3
• Multi-wavelength Temporal Variability of the Blazar 3C 454.3 during 2014 Activity Phase
• Modelling blazar flaring using a time-dependent fluid jet emission model - an explanation for orphan flares and radio lags
• Leptonic and Lepto-Hadronic Modeling of the Nov. 2010 flare from 3C 454.3
• Factors Determining Variability Time in Active Galactic Nucleus Jets
• Long-term optical spectroscopic variations in blazar 3C 454.3
• Extremely high polarization in 2010 outburst of blazar 3C 454.3
• Turbulent spectra of the brightest gamma-ray flares of blazars
• Shaping the GeV-spectra of bright blazars

Cited by in corpus (8)

• Multiwavelength Study of the Quiescent States of Six Brightest Flat Spectrum Radio Quasars detected by Fermi-LAT
• Multiwavelength analysis and the difference in the behavior of the spectral features during the 2010 and 2014 flaring periods of the blazar 3C 454.3
• Broadband study of OQ 334 during its flaring state
• On the origin of GeV spectral break for Fermi blazars: 3C 454.3
• Gamma-ray flares and broadband spectral study of PKS 0402-362
• Broadband Spectro-temporal Study on Blazar TXS 1700+685
• Multi wavelength study of 4C+28.07
• Extreme Transients in Gamma Rays