Multiwavelength Intraday Variability of the BL Lac S5 0716+714

Abstract

We report results from a 1 week multi-wavelength campaign to monitor the BL Lac object S5 0716+714 (on December 9-16, 2009). In the radio bands the source shows rapid (~ (0.5-1.5) day) intra-day variability with peak amplitudes of up to ~ 10 %. The variability at 2.8 cm leads by about 1 day the variability at 6 cm and 11 cm. This time lag and more rapid variations suggests an intrinsic contribution to the source's intraday variability at 2.8 cm, while at 6 cm and 11 cm interstellar scintillation (ISS) seems to predominate. Large and quasi-sinusoidal variations of ~ 0.8 mag were detected in the V, R and I-bands. The X-ray data (0.2-10 keV) do not reveal significant variability on a 4 day time scale, favoring reprocessed inverse-Compton over synchrotron radiation in this band. The characteristic variability time scales in radio and optical bands are similar. A quasi-periodic variation (QPO) of 0.9 - 1.1 days in the optical data may be present, but if so it is marginal and limited to 2.2 cycles. Cross-correlations between radio and optical are discussed. The lack of a strong radio-optical correlation indicates different physical causes of variability (ISS at long radio wavelengths, source intrinsic origin in the optical), and is consistent with a high jet opacity and a compact synchrotron component peaking at ~= 100 GHz in an ongoing very prominent flux density outburst. For the campaign period, we construct a quasi-simultaneous spectral energy distribution (SED), including gamma-ray data from the FERMI satellite. We obtain lower limits for the relativistic Doppler-boosting of delta >= 12-26, which for a BL\,Lac type object, is remarkably high.

arXiv comment16 pages, 15 figures, table 2; Accepted for Publication in MNRAS

References in corpus (47)

• Unified Schemes for Radio-Loud Active Galactic Nuclei
• 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
• Photometric Calibration of the Swift Ultraviolet/Optical Telescope
• The Second Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
• A simple test for periodic signals in red noise
• Paper II: Calibration of the Swift ultraviolet/optical telescope
• Optical and radio behaviour of the BL Lacertae object 0716+714
• The unprecedented optical outburst of the quasar 3C 454.3. The WEBT campaign of 2004-2005
• Periodic Oscillations in the Intra-day Optical Light Curves of the Blazar S5 0716+714
• Detection of the host galaxy of S5 0716+714
• Results of WEBT, VLBA and RXTE monitoring of 3C 279 during 2006-2007
• Multifrequency monitoring of the blazar 0716+714 during the GASP-WEBT-AGILE campaign of 2007
• Optical Intra-day Variability in Blazars
• Quasi-Periodic Oscillations of ~ 15 minutes in the Optical Light Curve of the BL Lac S5 0716+714
• A new activity phase of the blazar 3C 454.3. Multifrequency observations by the WEBT and XMM-Newton in 2007-2008
• Near Infrared Intraday Variability of Mrk 421
• The optical microvariability and spectral changes of the BL Lacertae object S5 0716+714
• Pulsar Scintillation and the Local Bubble
• The correlated optical and radio variability of BL Lacertae. WEBT data analysis 1994-2005
• Testing the inverse-Compton catastrophe scenario in the intra-day variable blazar S5 0716+71, III. Rapid and correlated flux density variability from radio to sub-mm bands
• The Intra-Night Optical Variability of the bright BL Lac object S5 0716+714
• The GASP-WEBT monitoring of 3C 454.3 during the 2008 optical-to-radio and gamma-ray outburst
• The Evolution of NGC 7027 at Radio Frequencies: A New Determination of the Distance and Core Mass
• Optical Monitoring of BL Lac Object S5 0716+714 with High Temporal Resolution
• WEBT and XMM-Newton observations of 3C 454.3 during the post-outburst phase. Detection of the little and big blue bumps
• Testing the inverse-Compton catastrophe scenario in the intra-day variable blazar S5 0716+71. I. Simultaneous broadband observations during November 2003
• Kinematic Study of the Blazar S5 0716+714
• Optical Monitoring of BL Lacertae Object S5 0716+714 with a Novel Multi-Peak Interference Filter
• Nearly Periodic Fluctuations in the Long Term X-ray Light Curves of the Blazars AO 0235+164 and 1ES 2321+419
• Modeling the 3C 120 Radio Jet from 1 to 30 Milliarcseconds
• Radio-to-UV monitoring of AO 0235+164 by the WEBT and Swift during the 2006--2007 outburst
• The high activity of 3C 454.3 in autumn 2007. Monitoring by the WEBT during the AGILE detection
• Multiwavelength Observations of 3C 66A during the WEBT campaign of 2003 - 2004
• The WEBT campaign to observe AO 0235+16 in the 2003-2004 observing season
• Rapid optical variability in blazar S5 0716+71 during 2010 March
• The WEBT Campaign on the Intermediate BL Lac Object 3C66A in 2007-2008
• Testing the inverse-Compton catastrophe scenario in the intra-day variable blazar S5 0716+71: II. A search for intra-day variability at millimetre wavelengths with the IRAM 30 m telescope
• The IDV source J1128+5925, a new candidate for annual modulation?
• Optical Intraday Variability Studies of Ten Low Energy Peaked Blazars
• Intraday Variability in Northern Hemisphere Radio Sources
• A new ordering parameter of spectral energy distributions from synchrotron-self-Compton emitting blazars
• The radio lightcurve of SN 2008iz in M82 revealed by Urumqi observations
• Space-VLBI Polarimetry of the BL Lac Object S5 0716+714: Rapid Polarization Variability in the VLBI core
• Intra-day variability observations of S5 0716+714 over 4.5 years at 4.8 GHz
• Multi-frequency VLBA study of the blazar S5 0716+714 during the active state in 2004: I. Inner jet kinematics

Cited by in corpus (39)

• The Spectral Energy Distributions of Fermi Blazars
• An Optical View of BL Lacertae Objects
• Radio to gamma-ray variability study of blazar S5 0716+714
• Kinematics of and emission from helically orbiting blobs in a relativistic magnetized jet
• Multifrequency Photo-polarimetric WEBT Observation Campaign on the Blazar S5 0716+714: Source Microvariability and Search for Characteristic Timescales
• Improved characterisation of intra-night optical variability of prominent AGN classes
• Multi-wavelength Intra-day Variability and Quasi-periodic Oscillation in Blazars
• Characterizing optical variability of OJ 287 in 2016 - 2017
• Long term variability and correlation study of the blazar 3C 454.3 in radio, NIR and optical wavebands
• The Estimation of Fundamental Physics Parameters for Fermi-LAT Blazars
• Radio Variability and Random Walk Noise Properties of Four Blazars
• Peak of spectral energy distribution play an important role in intra-day variability of Blazars?
• First hard X-ray observations of the blazar S5 0716+714 with NuSTAR during a multiwavelength campaign
• X-ray Intraday Variability of the TeV Blazar PKS 2155-304 with Suzaku During 2005-2014
• Optical monitoring of BL Lac object S5 0716+714 and FSRQ 3C273 from 2000 to 2014
• Core shift effect in blazars
• X-ray Intraday Variability of the TeV Blazar Mrk 421 with {\it Chandra}
• The long-term centimeter variability of active galactic nuclei: A new relation between variability timescale and accretion rate
• Optical and Radio Variability of BL Lacertae
• Probing the innermost regions of AGN jets and their magnetic fields with RadioAstron. III. Blazar S5 0716+71 at microarcsecond resolution
• Simultaneous optical monitoring of BL Lacertae object S5 0716+714 with high temporal resolution
• Search for Intra-day Optical Variability in $\gamma$-ray--loud Blazars S5 0716+714 and 3C 273
• Multi-color optical monitoring of the BL Lacertae object S5 0716+714 during the 2012 outburst
• Radio and optical intra-day variability observations of five blazars
• On the photometric error calibration for the `differential light curves' of point-like Active Galactic Nuclei
• Jet Kinematics of the Quasar 4C +21.35 from Observations with the KaVA Very Long Baseline Interferometry Array
• Kepler light curve analysis of the blazar W2R 1926+42
• S5 0716+714 : GeV variability study
• The parsec-scale jet of the neutrino-emitting blazar TXS~0506+056
• Optical Variability of Three Extreme TeV Blazars
• The presence of interstellar scintillation in the 15 GHz interday variability of 1158 OVRO-monitored blazars
• Multi-band Cross-correlated Radio Variability of the Blazar 3C 279
• Rapid variability of BL Lac 0925+504: interstellar scintillation induced?
• The jet of S5 0716+71 at $\mu$as scales with RadioAstron
• Investigating Optical Variability of the Blazar S5 0716+714 On Diverse Time-scales
• Simultaneous dual-frequency radio observations of S5 0716+714: A search for intraday variability with the Korean VLBI Network
• A Search for AGN Intra-day Variability with KVN
• Optical Monitoring and Long-term Optical Spectral Variability of BL Lacertae Object S5 0716+714
• Variability Study and Searching for QPOs with day-like periods in the blazar S5 0716+714 with TESS