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.

Besides the invited talks, plenty of time will be devoted to Poster sessions for which contributions are welcomed!

If you have pre-registered for this meeting but have not received a registration invitation, or if you have not pre-registered but would like to attend, please contact the .