BLAZARS2008
April 22-25, 2008
Palaiseau, France
published January 14, 2009
Palaiseau, France
published January 14, 2009
It has been known for a long time that blazars are variable, both on short (minutes to days) and long (weeks to years) timescales. Various models exist to explain the mechanisms causing variability, and disentangling them has also been particularly hard. A wide variety of tools are used to define and characterize variability, with varying limitations depending on the analysis method and observation uniformity. We plan to have several wavelength-dependent review talks about variability of blazars, ranging from radio to Very High Energy wavelengths, with a special emphasis on Atmospheric Cherenkov Telescope results - and possibly from GLAST - where the timescales have been the shortest. A better view of their fluctuations and power spectra, flare asymmetries in lightcurves, their possible intrinsic or extrinsic origin, as well as different talks on analysis methods strengths and limitations. The main objective of the meeting is to have a view across the spectrum of what the relevant characteristics are (timescales, power distributions), their correlations, the caveats of their assessment, and what underlying physics can realistically be probed with the current generation of instruments.
| Session1: The blazar paradigm |
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Blazars: the broadband observational point of view
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Implications of VHE emission in Gamma-Ray AGN
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Pair cascades in AGN
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Can short variability time scales be reconciled with hadronic emission
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| Session 2: The soft side |
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VLBA observations of Blazars
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VLBI polarisation variability and implications for jet models
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Total intensity radio variations in blazars
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Variability of blazars in the IR-optical-UV energy bands: observational facts
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Thermal AGN signatures in blazars
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| Session 3: The hard side |
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Long-term X-ray variability in Blazars and its multiwaveband context
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GeV gamma-ray variability
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Variability of VHE gamma-ray blazars
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TeV/X-ray correlated variability in blazars (optical, radio)
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| Session 4: Analysis tools |
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Explaining X-ray Variability in Blazars
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Characterizing X-ray variability of blazars
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The emission of blazars in VHE gamma-rays viewed as a random stationary process: the case of PKS 2155-304
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| Session 5: Mechanisms at play and their inherent variability |
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Particle acceleration, shocks, reconnection...
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A unified time-dependent view of relativistic jets
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Multiwavelength synchrotron/Compton spectral analysis of TeV blazars and FSRQs: a new approach
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Radiative outputs of blazars
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Variability and propagation effects
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Unification scenarios: the case of M87
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| Session 6: Future instruments and measurements |
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The next generation of X-ray sensitive observatories and their potential for blazar variability studies
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Strengths and limitations of Atmospheric Cherenkov Telescopes (ACTs) - Present and Future - for transient VHE sources
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What have we learned? Outstanding questions...
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| Poster |
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ESO VLT optical spectroscopy of BL Lac objects
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Probing the Jet Physics of TeV Blazars
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M87
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Multi band optical micro variability of BL Lac objects
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OJ 287 colors during a multifrequency campaign
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L Band (20cm) Radio Analysis of WARPS Galaxy Clusters
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Optical Variability Monitoring for Gamma ray Blazars: preliminary results
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AGILE detection of a strong gamma ray flare from the blazar S5 0716 714 during September-October 2007
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injection of electron with red noise light curve
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Optical polarization variability in TeV BL Lacs
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Multi wavelenth observations of PG 1553 113
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Infrared polarimetry of 3C454 3 during a flare
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The nonlinear long term X ray variability of Mrk 421
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The AGN Monitoring Program with the Whipple 10m Observatory
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Variability on Decaparsec scales of a number of BL Lac objects
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Long term radio variability of AGN
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Observations of blazars by the ESA INTEGRAL satellite
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VRIJHK photometry of PKS 0537-441 and PKS 2155-304 in 2006-2008
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X ray spectral variability of TeV Blazars
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The ten years optical study of ESS and TeV samples of BL Lacertae objects
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discovery of VHE gamma rays from RGB J0152 017
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Optically Triggered Target of Opportunity Observations with the MAGIC Telescope
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Roma BZCAT: a Multifrequency Blazar catalogue
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The Timescales of the Optical Variability of 3C454 3
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Stability of magnetized spine sheath relativistic jets
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Blazar sequence: the effect of Doppler correction
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Radiation from relativistic jets
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Observation of Gamma Ray Variability of 3C 273 with AGILE during the MWL campaign of Dec 2007
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Last results from the WEBT and GASP
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XMM Newton Observations of Low Energy Peaked BL Lac Objects
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VERITAS Observations of Mrk 421 with Simultaneous Coverage in the X ray Band
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Possible variability signatures of Supermassive Binary Black Holes in Blazars
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Swift Observations of emission line radio loud AGN
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Multicolor polarimetric observation of 15 min variability in S5 0716 714
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Suzaku observation of TeV blazar 1ES 1218 304: clues on particle acceleration in an extreme TeV blazar
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Large amplitude intraday variability in 1156 295 observed during a VLBI experiment
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Suzaku observation of the OJ 287, Quiescence and Predicted flare in 2007
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Mkn 501 Binary black holes as source of Variability
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Lobster Eye X ray Monitor and Blazars
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Temporal Variability Study of the BL Lac object PKS2155 304 with H E S S
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Hard X ray observation of Fornax A west lobe with Suzaku
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A time dependent inhomogeneous stratified jet model applied to TeV blazar PKS 2155 304
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Longterm multi wavelength variability of 3C 273
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Simultaneous optical infrared polarimetry of blazars with TRISPEC/KANATA
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Modelling the Delayed Emission in the 2005 Mkn 501 Flare
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The Perugia variability monitoring of blazars
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Analytical and numerical time-dependent modelling of SSC blazars variability
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Long term VHE gamma ray monitoring of bright blazars with a dedicated Cherenkov telescope
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The International High Energy Astrophysics Multiwavelength Coordination Wiki
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Very long term observations of blazars candidates for supermassive black hole binaries
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Multifrequency observation of VLBL objects
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