The CNOC cluster redshift survey catalogs .3. MS 1621.5+2640 and MS 0302.7+1658

A photometric and redshift catalog of galaxies in the field of two rich galaxy clusters, MS 1621.5 + 2640 (z = 0.4275) and MS 0302.7 + 1658 (z = 0.4245), is presented as part of the CNOC cluster redshift survey carried out at the Canada-France-Hawaii Telescope (CFHT) using the MOS imaging multiobject spectrograph. The imaging and spectroscopic observations cover strips centered on each cluster of approximately 23.'3 x 9.'0, and 7.'9 x 9.'0, for MS 1621.5 + 2640 and MS 0302.7 + 1658, respectively. Redshifts for 371 galaxies, primarily ranging in magnitude from r = 20 to 22, were obtained. The data set is also presented graphically in several forms. The magnitude, color, and geometric selection functions for the redshift sample are presented and discussed.