Top: Long‐term I light curve of XMMU J005152.2−731033 (SXP172). Middle: Variance calculated by the PDM method (upper, with scale on right) and periodogram (lower) of ﹩I^{*}﹩ data from segment A. The 99% confidence level is also shown. Bottom: ﹩I^{*}﹩ data folded on the 69.9 day period and binned (squares), with the individual points from the outburst near MJD 50,790 superposed (circles).