INTERFEROMETER PHASE CALIBRATION SOURCES - III - THE REGIONS AL-TO-DELTA(B1950)LESS-THAN-OR-EQUAL-TO+35-DEGREES AND O-DELTA(B1950)LESS-THAN-OR-EQUAL-TO+90-DEGREES(20)

We present a catalogue of 540 compact radio sources in the declination ranges +20 degrees less than or equal to delta(B1950) less than or eq ual to +35 degrees and +75 degrees less than or equal to delta(B1950) less than or equal to +90 degrees, the positions of which have been me asured to an rms accuracy of about 55 rnas with the Very Large Array ( VLA). These sources are primarily intended for use as phase calibratio n sources for MERLIN. However, they will also be suitable as phase cal ibrators for the VLA and can be considered as candidate phase calibrat ors for very long baseline interferometry (VLBI) networks.