Frequency spectrum (top) and the phased V light curve (bottom) of IRAS 11472−0800 based on the period of 31.16 d. The spread in the phased light curve is due in part to the apparent seasonal shifts in the phase of the light curve (see Fig. 7). The solid line is a fit to the data averaged in phase bins. (Note that the data from the 2000–2001 and 2001–2002 seasons have been excluded.)