X-ray Intra-day Variability of the TeV Blazar Mrk 421 with Suzaku

Abstract

We present X-ray flux and spectral analyses of the three pointed Suzaku observations of the TeV high synchrotron peak blazar Mrk 421 taken throughout its complete operational duration. The observation taken on 5 May 2008 is, at 364.6 kiloseconds (i.e., 101.3 hours), the longest and most evenly sampled continuous observation of this source, or any blazar, in the X-ray energy 0.8 - 60 keV until now. We found large amplitude intra-day variability in all soft and hard bands in all the light curves. The discrete correction function analysis of the light curves in soft and hard bands peaks on zero lag, showing that the emission in hard and soft bands are cospatial and emitted from the same population of leptons. The hardness ratio plots imply that the source is more variable in the harder bands compared to the softer bands. The source is harder-when-brighter, following the general behavior of high synchrotron peak blazars. Power spectral densities of all three light curves are red noise dominated, with a range of power spectra slopes. If one assumes that the emission originates very close to the central super massive black hole, a crude estimate for its mass, of ~ 4 * 10^{8} M_{\odot}, can be made; but if the variability is due to perturbations arising there that are advected into the jet and are thus Doppler boosted, substantially higher masses are consistent with the quickest seen variations. We briefly discuss the possible physical mechanisms most likely responsible for the observed flux and spectral variability.

arXiv comment16 pages, 3 figures, 3 tables, accepted by ApJ

References in corpus (64)

• Unified Schemes for Radio-Loud Active Galactic Nuclei
• On characterising the variability properties of X-ray light curves from active galaxies
• An Exceptional VHE Gamma-Ray Flare of PKS 2155-304
• Hard X-ray Detector (HXD) on Board Suzaku
• Turbulent, Extreme Multi-Zone Model for Simulating Flux and Polarization Variability in Blazars
• Constraints on the Physical Parameters of TeV Blazars
• X-ray Spectral Variability and Rapid Variability of the Soft X-ray Spectrum Seyfert 1 Galaxies Ark 564 and Ton S180
• A simple test for periodic signals in red noise
• 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
• Fermi-LAT Observations of Markarian 421: the Missing Piece of its Spectral Energy Distribution
• In-Orbit Performance of the Hard X-ray Detector on board Suzaku
• 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
• X-ray variability of 104 active galactic nuclei. XMM-Newton power-spectrum density profiles
• A Multi-wavelength View of the TeV Blazar Markarian 421: Correlated Variability, Flaring, and Spectral Evolution
• Multiwavelength Observations of Markarian 421 in March 2001: an Unprecedented View on the X-ray/TeV Correlated Variability
• Three-dimensional simulations of super-critical black hole accretion disks --- luminosities, photon trapping and variability
• Multi-colour optical monitoring of eight red blazars
• TeV and Multi-wavelength Observations of Mrk 421 in 2006-2008
• Multiwavelength Study of Quiescent States of Mrk 421 with Unprecedented Hard X-Ray Coverage Provided by NuSTAR in 2013
• Chandra Detection of the First X-ray Forest along the Line of Sight To Mkn 421
• Unprecedented study of the broadband emission of Mrk 421 during flaring activity in March 2010
• Complex Spectral Variability from Intensive Multi-wavelength Monitoring of Mrk421 in 1998
• Optical Intra-day Variability in Blazars
• The Black Hole Masses and Host Galaxies of BL Lac Objects
• Four Years Monitoring of Blazar PKS 2155-304 with BeppoSAX: Probing the Dynamics of the Jet
• Simultaneous X-Ray and TeV Gamma-Ray Observations of the TeV Blazar Markarian 421 during February and May 2000
• Near Infrared Intraday Variability of Mrk 421
• X-ray Flaring Activity of Mrk 421
• The Outburst of the Blazar AO 0235+164 in 2006 December: Shock-in-Jet Interpretation
• Variability Time Scales of TeV Blazars Observed in the ASCA Continuous Long-Look X-ray Monitoring
• The Intra-Night Optical Variability of the bright BL Lac object S5 0716+714
• Optical Flux and Spectral Variability of Blazars
• The black hole mass of BL Lac objects from the stellar velocity dispersion of the host galaxy
• Detection of Intra-day Variability Timescales of Four High Energy Peaked Blazars with XMM-Newton
• Observing Mkn 421 with XMM--Newton: the EPIC--PN point of view
• Optical variability of the BL Lacertae object GC 0109+224. Multiband behaviour and time scales from a 7-years monitoring campaign
• Supermassive Black Hole Masses of AGNs with Elliptical Hosts
• Kepler observations of rapid optical variability in the BL Lac object W2R1926+42
• Quasi-simultaneous two band optical variability of the blazars 1ES 1959+650 and 1ES 2344+514
• 4.5 years multi-wavelength observations of Mrk 421 during the ARGO-YBJ and Fermi common operation time
• X-ray Intraday Variability of Five TeV Blazars with NuSTAR
• Multiwavelength Observations of the Blazar Mrk 421 in December 2002 and January 2003
• Hard X-ray properties of NuSTAR blazars
• Time Dependent Hadronic Modeling of Flat Spectrum Radio Quasars
• XMM-Newton timing mode observations of Mrk 421
• Intra-night optical variability of core dominated radio quasars: the role of optical polarization
• Violent Hard X-ray Variability of Mrk 421 Observed by NuSTAR in 2013 April
• Data-oriented Diagnostics of Pileup Effects on the Suzaku XIS
• Long-term multi-wavelength variability and correlation study of Markarian 421 from 2007 to 2009
• Modeling the Emission from Turbulent Relativistic Jets in Active Galactic Nuclei
• XMM - Newton observations of Markarian 421
• MAXI investigation into the longterm X-ray variability from the very-high-energy gamma-ray blazar Mrk 421
• Spectroscopic monitoring of the BL Lac object AO 0235+164
• Suzaku Wide Band Analysis of the X-ray Variability of TeV Blazar Mrk 421 in 2006
• X-ray Intraday Variability of the TeV Blazar Mrk 421 with {\it Chandra}
• An active state of the BL Lac Object Markarian 421 detected by INTEGRAL in April 2013
• A Novel Approach in Constraining Electron Spectra in Blazar Jets: The Case of Markarian 421
• Intra-Night Optical Variability Monitoring of Fermi Blazars: First Results from 1.3 m J C Bhattacharya Telescope
• Testing one-zone synchrotron-self-Compton models with spectral energy distributions of Mrk 421
• Kepler light curve analysis of the blazar W2R 1926+42
• A Suzaku X-Ray Study of the Particle Acceleration Processes in the Relativistic Jet of Blazar Mrk 421
• Understanding the General Feature of Microvariability in $Kepler$ Blazar W2R 1926$+$42
• A search for chaos in the optical light curve of a blazar: W2R 1926+42
• Statistical analysis of variability properties of the Kepler blazar W2R 1926+42

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• Correlated Short-Timescale Hard-Soft X-ray Variability of the Blazars Mrk 421 and 1ES 1959+650 using $\text{AstroSat}$
• Characterising continuum variability in the radio-loud narrow-line Seyfert 1 galaxy IRAS 17020+4544
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