|WFC3 Instrument Handbook for Cycle 25|
D.1 UVIS ChannelThe UVIS channel’s CCDs have no bright-object constraints. Overexposures on very bright targets do not have any adverse health and safety issues, nor should they affect subsequent exposures. As for any CCD, there can be some bleeding into adjacent rows and columns surrounding the bright object. This however is generally quite modest assuming the bright object is not itself the science target. From a scientific perspective, the largest problem with bright targets in the field is likely to arise from window or filter ghosts (See Section 6.5.3).