Multi-wavelength study of Mrk 421 TeV flare observed with \emph{TACTIC} telescope in February 2010

Abstract

We present results from multi-wavelength study of intense flaring activity from a high frequency peaked BL Lac object Mrk 421. The source was observed in its flaring state on February 16, 2010 with the $TACTIC$ at energies above 1.5 TeV. Near simultaneous multi-wavelength data were obtained from high energy (MeV-GeV) $\gamma$--ray observations with \emph{Fermi}--LAT, X--ray observations by the \emph{Swift} and \emph{MAXI} satellites, optical V-band observation by SPOL at \emph{Steward Observatory} and radio 15 GHz observation at OVRO 40 meter-telescope. We have performed a detailed spectral and temporal analysis of $TACTIC$, \emph{Fermi}--LAT and \emph{Swift}--XRT observations of Mrk 421 during February 10--23, 2010 (MJD 55237-55250). The flaring activity of the source is studied by investigating the properties of daily light curves from radio to $TeV$ energy range and we present the correlation and variability analysis in each energy band. The $TeV$ flare detected by $TACTIC$ on February 16, 2010 is well correlated with the activity in lower energy bands. The differential energy spectrum of the source, in the energy range 1.5-11 TeV, as measured by $TACTIC$ on this night is described by a power law ($dN/dE\propto E^{-\Gamma }$) with spectral index $\Gamma =2.6\pm 0.3$. After accounting for absorption of $TeV$ photons by low energy extragalactic background light photons via pair production, the intrinsic $TeV$ spectrum reveals a power law index of $2.3\pm 0.3$. Finally the broad band spectral energy distribution of the source in flaring state is reproduced using a simple emission model involving synchrotron and synchrotron self Compton processes. The obtained parameters are then used to understand the energetics of the source during the flaring episode.

arXiv commentAccepted for Publication in Astroparticle Physics

References in corpus (34)

• Unified Schemes for Radio-Loud Active Galactic Nuclei
• The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
• The Swift X-ray Telescope
• The Swift Ultra-Violet/Optical Telescope
• The Burst Alert Telescope (BAT) on the Swift MIDEX Mission
• A Unifying View of the Spectral Energy Distributions of Blazars
• The extragalactic optical-infrared background radiations, their time evolution and the cosmic photon-photon opacity
• A theoretical unifying scheme for gamma-ray bright blazars
• The MAXI Mission on the ISS: Science and Instruments for Monitoring All Sky X-Ray Images
• Extragalactic Background Light Inferred from AEGIS Galaxy SED-type Fractions
• BL Lac Objects in the Synchrotron Proton Blazar Model
• Blazars in the Fermi Era: The OVRO 40-m Telescope Monitoring Program
• TeV Gamma Rays from BL Lac Objects due to Synchrotron Radiation of Extremely High Energy Protons
• X-ray Spectral Variability and Rapid Variability of the Soft X-ray Spectrum Seyfert 1 Galaxies Ark 564 and Ton S180
• Fermi-LAT Observations of Markarian 421: the Missing Piece of its Spectral Energy Distribution
• Jets and accretion processes in Active Galactic Nuclei: further clues
• Observations of Mkn 421 with the MAGIC Telescope
• TeV and Multi-wavelength Observations of Mrk 421 in 2006-2008
• Coordinated Fermi/Optical Monitoring of Blazars and the Great 2009 September Gamma-ray Flare of 3C 454.3
• Possible Production of High-Energy Gamma Rays from Proton Acceleration in the Extragalactic Radio Source Markarian 501
• Mrk 421 as a case study for TeV and X-ray variability in leptohadronic models
• Simultaneous Multiwavelength Observations of Markarian 421 During Outburst
• Emitting electrons spectra and acceleration processes in the jet of Mrk 421: from low state to giant flare state
• Multiwavelength Variability of the Blazars Mrk 421 and 3C 454.3 in the High-State
• Multiwavelength study of TeV Blazar Mrk421 during giant flare
• The TACTIC atmospheric Cherenkov Imaging telescope
• Modelling the VHE flare of 3C 279 using one zone leptonic model
• Widespread nanoflare variability detected with Hinode/XRT in a solar active region
• Bright X-ray flares from the BL Lac object Mrk 421, detected with MAXI in 2010 January and February
• Observations of TeV gamma-rays from Mrk 421 during Dec. 2005 to Apr. 2006 with the TACTIC telescope
• Gamma-ray variability of radio-loud narrow-line Seyfert 1 galaxies
• A Two Zone Synchrotron Model for the Knots in the M87 Jet
• ANN-based energy reconstruction procedure for TACTIC gamma-ray telescope and its comparison with other conventional methods
• TeV Gamma-ray Observations of Markarian 421 using TACTIC during 2009-10

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