along it actually belong to two different pulsars. The group of points at about MJD 51600 is due to an outburst from SMC X-2, Below these points, 2$^{nd}$, 3$^{rd}$ and 4$^{th}$ harmonics are visible. There then follows a short ($\sim$ 2 week) break in observing coverage after which the pulsations were again detected but visibly weaker and with the relative strength of the harmonics altered. Just after MJD 51900 a third group of points appear on the “2.37 & 2.39” line, these are the first harmonic of XTE J0052-723 which was first discovered in these observations, the fundamental is seen just once on this plot.

No sub-second pulsars were detected, only 3 observations containing significant peaks at P$<$1s were ever seen:

\(1) A single detection of the (P/2) harmonic of SMC X-1; and 2 harmonics of SMC X-2 (P/5 and P/6).

\(2) On MJD 51381, period 0.0329429(5)s, amplitude 0.73 , significance above 99% in one 1050s observation. However two other observations on the same day, of comparable length made $~$1 hr before and $~$1 hr after failed to show any evidence for this period.

\(3) On MJD 51432, period 0.0747731(3)s, amplitude 0.31 , significance 97%. It is expected that a 