Measurements of VAR on running average images during three, subsequent in time, on-sky experiments. The running average image for iteration i is defined as the average of images i − 50 to i. The gray box denotes the iterations for which the full average of 50 images could not be calculated. (a) The measurements during the first closed-loop test. (b) The F&F loop was opened, i.e. gain was set to zero and its DM correction removed. (c) Loop was closed again.