Pulsars are the clocks of cosmos. They emit beams of electromagnetic radiation out of their magentic poles and appear like blinking stars.
In order to understand a pulsar one must analyze its dispersion pattern as its signal passes through ionized clouds of cosmic matter.
W.A. Majid, A.B. Pearlman, T. Dobreva, S. Horiuchi, J. Kocz, J. Lippuner, and T.A. Prince, The Astrophysical Journal 834, L2 (2016)