  Photometric observations of V597 Pup made in 2008, 9.1 mag below maximum, 4
months after eruption, showed no certain orbital modulation but exhibited a
quintuplet of oscillations centred on a period 261.9 s and uniform splitting at
a frequency ~2.68 h^{-1}. One year later the system had fallen in brightness by
a further 2.5 mag, showed deep eclipses with a period of 2.6687 h, and the
261.9 s modulation at a reduced amplitude. There is often power near the
`subharmonic' at 524 s, showing that the shorter periods observed are actually
first harmonics.
  V597 Pup is thus an intermediate polar and is in the `orbital period gap'.
Furthermore it is the first to show a prominent secondary eclipse, caused by
passage of the optically thick disc in front of the irradiated side of the
secondary star.
