Abstract

We present optical and GeV lightcurves of 0716+714, a bright BL Lac object well known for persistent variability on all timescales thoughout the entire electromagnetic spectrum. Both lightcurves have very few gaps and reveal variations on all timescales that can be probed in the Fermi-data set, limited only by photon-statistics and mission lifetime on the high-frequency and low-frequency end, respectively. Within statistics, we find no lags and a close match of flares with different Compton-dominance in different events. Given the short-timescales of optical variations, we specifically discuss the effects of the sampling pattern on the correlation properties.