2 Source sample

We have selected about 700 sources from the Preston et al. (1985) VLBI survey. These sources have a correlated flux density $F^\mathrm{corr}_{13}\ge 0.1$ Jy at the wavelength of 13 cm, and are located north of declination $-30^\circ$. The northern sector of RATAN-600 restricts this declination range from $-30^\circ$ to $+43^\circ$. Measurements of the sources located north of declination $+49^\circ$ were made in 1998 with the southern sector of RATAN-600 and will be published at a later date.

The list of 551 sources for northern sector observations is presented in Table 1. The columns of this table are as follows: (1) the IAU name, (2) possible other name, (3) the optical identification (OI) and (4) the red shift. The OI and red shifts are taken from Veron-Cetty & Veron (1998) or, if not found there, are taken from the NASA/IPAC Extragalactic database (NED). The abbreviations used are "Q" for quasars, "BL" for BL Lacertae objects, "G" for galaxies, "RS" for radio sources. In the latter case we do not have OI. An extended version of this table is available in electronic form at the CDS. This also includes B1950 coordinates taken from Preston et al. (1985) and Morabito et al. (1986), correlated flux densities at 13 cm with errors from Preston et al. (1985) and optical spectrum classifications from Veron-Cetty & Veron (1998).