small number of false detections will occur given the large number of observations analyzed and this low significance detection may thus not be real.

Results II: Long Term Pulsar Lightcurves {#sect:lcurves}
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Long term behavior of all known pulsars in the SMC was investigated using the database of [Lomb-Scargle periodogram]{}s generated from the [[*RXTE* ]{}]{}monitoring observations.

In the following section the pulsars are ordered by pulse period. Trends in physical characteristics are likely to follow the pulse period, so it is appropriate to list the systems in a natural sequence that facilitates comparison.

The most important results are shown in a series of 3-panel plots for each source, laid out as follows:

[*Top panel.*]{} Pulsed flux lightcurve, filled symbols indicate positive detections, open symbols are upper limits. Pulse period with uncertainty. Statistical significance of each pulsed flux measurement. Two significance estimators are plotted: Blind search (squares), and prior knowledge of period (circles). The criterion for a positive detection was 99% prior knowledge significance. Blind search significance values are shown in order to convey those detections of outstanding magnitude.

SMC X-2 (2.37s)
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SMC X-2 was discovered by *SAS-3* in 1978 [@Clarke78] and although outbursts were also observed by *HEAO 1* 