This double pulsar is the first-discovered binary-pulsar with two visible pulsars. Several other ones have previously been discovered, but they have only one visible pulsar, and a few have white-dwarf companions. Which means that they provide fewer parameters for testing relativistic-gravity hypotheses.

It was discovered only recently, thus the imprecision of some of the observed parameters. It will take some months to get improved parameters, like improved redshift and precession values and the orbit-inspiral rate, but the results will come.

In particular, it can be shown that for a constant-orientation orbit, the pulsar orbit-induced redshift delays cannot be distinguished from plain orbit-crossing time delay. It takes periapsis precession to help untangle these effects, and, of course, the more the better.