3 Results

The resulting optical positions with respect to the Hipparcos frame, and therefore in the system of the ICRS, are given in Table 1. The first column gives the IAU designation of the sources, the second and fourth columns their right ascensions and declinations, the third and fifth columns their corresponding total internal errors and the sixth column the epochs of the observations. Finally, Col. (7) gives the magnitude and nature of the objects. Q, G and EF stand for QSO, Galaxy and empty field, respectively. var.? indicates that the optical counterpart could be grossly variable, as suggested by the inconsistencies detected in the value assigned to its magnitude.

  

Table 1: Optical positions in the ICRS system of 25 compact extragalactic radio sources