Examples of images used to visually check the moving object candidates selected by the algorithm described in Section 2.1. Each row displays the cutouts from the first and last epochs in unWISE coadds, and the corresponding differences between the images and median of all available epochs. All cutouts are centered on the position of the object from the first epoch (so that it is in the center in the first and third columns). Red dots mark the positions of the objects from all available epochs, with the larger circle corresponding to the current epoch of the image. The first and second rows display the actual moving objects, for isolated and crowded fields, while the third one shows an artifact due to a bright star spike, and the last a spurious candidate due to linking together individual detections of several stationary objects located roughly along the line.