HI imaging of galaxy clusters at z ≈ 0.2, a pilot survey of Abell 963 and Abell 2192

Only one galaxy is detected within a 1 Mpc radius from the center of the Butcher-Oemler cluster Abell 963, and none of the blue B-O galaxies which are all located within the central Mpc. The HI detected galaxies outside the central Mpc are of similar colour and magnitude as the non-detected B-O galaxies, indicating that the blue B-O galaxies are gas poor compared to their counterparts in the field.