Multi-wavelength study of the short term TeV flaring activity from the blazar Mrk 501 observed in June 2014

Abstract

In this work, we study the short term flaring activity from the high synchrotron peaked blazar Mrk 501 detected by the FACT and H.E.S.S. telescopes in the energy range 2-20 TeV during June 23-24, 2014 (MJD 56831.86-56831.94). We revisit this major TeV flare of the source in the context of near simultaneous multi-wavelength observations of gamma-rays in MeV-GeV regime with Fermi-LAT, soft X-rays in 0.3-10 keV range with Swift-XRT, hard X-rays in 10-20 keV and 15-50 keV bands with MAXI and Swift-BAT respectively, UV-Optical with Swift-UVOT and 15 GHz radio with OVRO telescope. We have performed a detailed temporal and spectral analysis of the data from Fermi-LAT, Swift-XRT and Swift-UVOT during the period June 15-30, 2014 (MJD 56823-56838). Near simultaneous archival data available from Swift-BAT, MAXI and OVRO telescope along with the V-band optical polarization measurements from SPOL observatory are also used in the study of giant TeV flare of Mrk 501 detected by the FACT and H.E.S.S. telescopes. No significant change in the multi-wavelength emission from radio to high energy gamma-rays during the TeV flaring activity ofMrk 501 is observed except variation in soft X-rays. The varying soft X-ray emission is found to be correlated with the gamma-ray emission at TeV energies during the flaring activity of the source. The soft X-ray photon spectral index is observed to be anti-correlated with the integral flux showing harder-when-brighter behavior. An average value of 4.5% for V-band optical polarization is obtained during the above period whereas the corresponding electric vector position angle changes significantly. We have used the minimum variability timescale from the H.E.S.S. observations to estimate the Doppler factor of the emission region which is found to be consistent with the previous studies of the source.

arXiv comment28 Pages, 3 Figures, Accepted for Publication in Advances in Space Research

References in corpus (44)

• Unified Schemes for Radio-Loud Active Galactic Nuclei
• The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
• The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections
• The Swift X-ray Telescope
• The Swift Ultra-Violet/Optical Telescope
• Fermi Large Area Telescope First Source Catalog
• On characterising the variability properties of X-ray light curves from active galaxies
• The Spectral Energy Distribution of Fermi bright blazars
• Photometric Calibration of the Swift Ultraviolet/Optical Telescope
• The MAXI Mission on the ISS: Science and Instruments for Monitoring All Sky X-Ray Images
• Leptonic and Hadronic Modeling of Fermi-Detected Blazars
• The Swift/BAT Hard X-ray Transient Monitor
• Blazars in the Fermi Era: The OVRO 40-m Telescope Monitoring Program
• Variable VHE gamma-ray emission from Markarian 501
• Turbulent, Extreme Multi-Zone Model for Simulating Flux and Polarization Variability in Blazars
• Gamma-Ray Burst Afterglow: Polarization and Analytic Light Curves
• The Fermi blazar sequence
• A hadronic origin for ultra-high-frequency-peaked BL Lac objects
• Minute-Timescale >100 MeV gamma-ray variability during the giant outburst of quasar 3C 279 observed by Fermi-LAT in 2015 June
• Insights Into the High-Energy Gamma-ray Emission of Markarian 501 from Extensive Multifrequency Observations in the Fermi Era
• Proton synchrotron radiation of large-scale jets in active galactic nuclei
• Synchrotron Self-Compton Model for Rapid Nonthermal Flares in Blazars with Frequency-Dependent Time Lags
• Host galaxy subtraction of TeV candidate BL Lacertae objects
• An Optical View of BL Lacertae Objects
• On the Location of the Gamma-ray Emission in the 2008 Outburst in the BL Lacertae Object AO 0235+164 through Observations across the Electromagnetic Spectrum
• Spectral Energy Distribution of Markarian 501: Quiescent State vs. Extreme Outburst
• Correlation between the TeV and X-ray emission in high--energy peaked BL Lac objects
• Multiwavelength observations of Mrk 501 in 2008
• First NuSTAR Observations of Mrk 501 within a Radio to TeV Multi-Instrument Campaign
• Constraining the location of rapid gamma-ray flares in the FSRQ 3C 273
• Systematic Study of Gamma-ray bright Blazars with Optical Polarization and Gamma-ray Variability
• Stellar Velocity Dispersion and Black Hole Mass in the Blazar Markarian 501
• Long-term Monitoring on Mrk 501 for Its VHE gamma Emission and a Flare in October 2011
• The stellar content of low redshift BL Lac host galaxies from multicolour imaging
• Broadband Spectral Fitting of Blazars using XSPEC
• Very High Energy outburst of Markarian 501 in May 2009
• Reconciling models of luminous blazars with magnetic fluxes determined by radio core shift measurements
• Brightest Fermi-LAT Flares of PKS 1222+216: Implications on Emission and Acceleration Processes
• On the correlation between the X-ray and gamma-ray emission in TeV blazars
• Limits on Lorentz invariance violation at the Planck energy scale from H.E.S.S. spectral analysis of the blazar Mrk 501
• Multiwavelength study of VHE emission from Markarian 501 using TACTIC observations during April-May, 2012
• A time dependent approach to model X-ray and $\gamma$--ray light curves of Mrk 421 observed during the flare in February 2010
• Search for intra-day optical variability in Mrk 501
• Effects of Spin on High-Energy Radiation from Accreting Black Holes

Cited by in corpus (5)

• Characterization of Variability in Blazar Light curves
• Optical polarization properties of February 2010 outburst of the blazar Mrk 421
• Understanding the giant gamma-ray outburst on June 16, 2015 from the blazar 3C 279
• Exploring TeV candidates of Fermi blazars through machine learning
• Insights into the Long-term behavior of the optical polarization from the blazar 1ES 1959+650