Accurate Measurement of the Declinations of Radio Sources.

The two 90-foot steerable paraboloids of the Owens Valley Radio Observatory were used as a twoelement interferometer at 960 Mc/s with various separations along a north-south base line to measure accurately the declinations of a number of radio sources, most of which were of small diameter. The measured values of declination are tabulated for 110 sources with right ascensions between 0 hours and 14 hours 10 minutes. The standard errors of the measured values range from I 2.6 seconds of arc to I 46 seconds of arc, with an average of I 13 seconds of arc A discussion of the sources of error is included.