T Pyx light curve. This figure, taken from Patterson et al. (1998), shows the light curve of T Pyx folded on a period of 13.117 cycles per day (0.076237 days). The plot shows two full periods, so T Pyx only has one dip per cycle. We see a broad dip, which is too broad to be from an eclipse alone. Patterson et al. interpret the dip as resulting from the heating of one face on the companion star.