These diagnostic plots from the PSRCHIVE utility "pdmp" attempt to
optimize the S/N of a folded and dedispersed pulsar data cube.  Most
relevant to judging a detection is the peak in S/N as a function of
dispersion measure (DM) and pulse period (top plot).

The peak DM/P is very well predicted by the X-ray-derived rotational
ephemeris.

The cumulative pulse profile is shown at the bottom.

Despite the very low S/N of the WSRT detection, we believe it to be
credible given the match with the prediction of the rotational
ephemeris.