![]() ![]() ![]() This combination of quad aperture and quad filter ensures that the target is automatically placed in the correct quadrant for imaging with the requested quad bandpass. For the special case of quad filters (which are optical elements that include four different bandpasses simultaneously, one bandpass per WFC3 UVIS quadrant), the observer must select one of the “QUAD” Aperture values in the Phase II proposal, in conjunction with the desired quad filter via the filter parameter.
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