Representative OH (left) and RC (right) images from January 12, 2013, processed by removing the azimuthal median profile. Since the signal-to-noise ratio in the OH images is low and since we could not see any variation between images from the same night, we added three processed OH images from January 13 to obtain the result presented here. The images are oriented north up and east left. The field of view is 4.3′ × 4.3′. The arrow indicates the direction of the Sun.