Fig. 2

The sample frames after the background subtraction process: (a) Capture_00069 02_55_59Z.fits, (b) Capture_00088 02_56_08Z.fits, (c) Capture_00243 02_58_41Z.fits, (d) Capture_00317 03_00_14Z.fits. The frames are distorted or 'fuzzy' at this stage of the processing as sharpening steps have not been applied yet.