Optical Studies of Pulsar NP 0532

Science  21 Mar 1969:
Vol. 163, Issue 3873, pp. 1320-1322
DOI: 10.1126/science.163.3873.1320


The period of optical pulsations from NP 0532 has been determined to within 3 nanoseconds on three different nights. The time rate of change of the period (dP/dt)p was 36.17 x 10-9 second per day. The pulse shape was highly asymmetrical with strong indications of structure. The ratio of the amplitude of the main pulse to that of the interpulse varied with time. No evidence was found for photon coincidences in the pulse on a time scale shorter than 2 microseconds.