THE ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 99:297-348, 1995 August

 THE FIRST CALTECH-JODRELL BANK VLBI SURVEY. III. VLBI AND MERLIN OBSERVATIONS
                   AT 5 GHz AND VLA OBSERVATIONS AT 1.4 GHz

                  W. XU, A. C. S. READHEAD, AND T. J. PEARSON
      Owens Valley Radio Observatory, California Institute of Technology,
                              Pasadena, CA 91125

                                      AND

                      A. G. POLATIDIS AND P. N. WILKINSON
       University of Manchester, Nuffield Radio Astronomy Laboratories,
          Jodrell Bank, Macclesfield, Cheshire SK11 9DL, England, UK


                                   ABSTRACT

        We present the 5 GHz results from the first Caltech-Jodrell Bank
     (CJ1) VLBI survey.  The 1.6 GHz maps were presented in two separate
     papers (Polatidis et al. 1995; Thakkar et al. 1995).  These three
     papers complete the first stage of this program to map at both 1.6 and
     5 GHz all objects accessible to Mark II VLBI in the complete sample of
     135 objects with 1.3 > S_(5 Ghz) >= 0.7 Jy, Dec(1950) >= 35 deg, and
     |b| > 10 deg.  The combination of the CJ1 sample with the
     Pearson-Readhead (PR) sample provides a complete, flux density-limited
     sample of 200 objects with S_(5 GHz) >= 0.7 Jy, Dec(1950) >= 35 deg,
     |b| > 10 deg for which all of the objects accessible to Mark II VLBI
     have been mapped at both 5 GHz (129 objects) and 1.6 GHz (132
     objects).
        In addition to the 5 GHz VLBI maps, we present in this paper 5 GHz
     MERLIN observations of 20 objects and 1.4 GHz VLA observations of 92
     objects in the combined CJ1 + PR sample.  The VLA maps, together with
     L-band (1.3-1.7 GHz) maps available in the literature, provide a
     complete set of VLA maps for the combined CJ1 + PR sample.  Finally,
     we present the radio spectra of the objects in the CJ1 sample.
        The combined CJ1 + PR VLBI surveys provide a sample which is large
     enough for a number of important astrophysical and cosmological
     studies.  These will be presented in further papers in this series.

     Subject headings: quasars: general -- radio continuum: galaxies --
                       surveys