OPTICAL IDENTIFICATIONS OF RADIO-SOURCES FROM THE 1-JY, S4 AND S5 CATALOGS

CCD images of the fields of 115 radio sources from the 1 Jy, S4 and S5 catalogues are presented. New optical counterparts have been found fo r a total of 34 sources, a large fraction of which had as yet only bee n described as empty fields on Sky Survey Plates. Of the 54 radio sour ces with previously published identifications, 50 optical counterparts have been confirmed while for 4 sources new identifications are propo sed. R band magnitudes, derived from the CCD images, are provided for all but a few identified optical counterparts. The fields at the posit ions of 27 radio sources are still empty down to a limiting magnitude of at least ma = 22 mag, requiring much deeper optical as well as addi tional infrared images for establishing their optical counterparts.