The discovery of 12min X-ray pulsations from 1WGA J1958.2+3232
  During a systematic search for periodic signals in a sample of ROSAT PSPC (0.1-2.4 keV) light curves, we discovered 12min large amplitude X-ray pulsations in 1WGA J1958.2+3232, an X-ray source which lies close to the galactic plane. The energy spectrum is well fit by a power law with a photon index of 0.8, corresponding to an X-ray flux of about 10E-12 ergs cmE-2 sE-1. The source is probably a long period, low luminosity X-ray pulsar, similar to X Per, or an intermediate polar. 
G.L. Israel (Astr. Obs. of Rome), L. Angelini (NASA - GSFC), S.   Campana (Astr. Obs. of Milan), P. Giommi (SAX - SDC), L. S...