The end of the "Empty Field" epoch in optical identifications

Abstract

In order to obtain more comprehensive information about an celestial object, the radio image must be identified with the optical one. Many years the identification process is carried out with the coordinate coincidence criteria, which leads to abundant misidentifications and "empty field" in optics for the radio sources. For this reason significant part of radio sources do not have identifications in optic. In present paper we consider the radio refraction in the Galaxy, which significantly changes the coordinates of radio sources if compared with the optical one. By taking into account the radio refraction, the major number of the radio sources can be successfully identified with the optical objects.