Positions of Four Pulsars

Abstract

ACCURATE positions of four pulsars¹ have been measured with the one mile cross type radio telescope at the Molonglo Radio Observatory. This instrument², which operates at a frequency of 408 MHz, forms eleven beams simultaneously, each 2.7′ in right ascension by 2.8′ in declination and separated by 1.4′ in the north–south direction. Simultaneously with this the east–west arm can be used alone, giving a fan beam in the meridian plane 2.0′ by 4.2°. Similarly, there are eleven simultaneous fan beams available from the north–south arm; these are elongated in the east–west direction. Results from all these systems have been combined here. CP 1919 is, however, right on the northern limit of the east–west system.