31/05/15 PSR J1141-6545 has been seen orbiting its white dwarf companion every 4.8 hours using the UTMOST telescope.
The system is a binary radio pulsar that consists of a neutron star and white dwarf in an eccentric orbit (e=0.2) that exhibits a wide range of relativistic phenomena. The binary completes five orbits per day and has a large rate of advance of periastron(5.33o/yr) explained by Einstein’s General Theory of Relativity.
Data were taken by PhD student Vivek V Krishnan on the night of May 30th 2015. The error bars are too small to see in the plot, which shows the change in the pulsar’s frequency as a function of time, over a little more than a complete orbit.
Image credits: Vivek V Krishnan and Matthew Bailes.