Using the PDM method on Vanmunsters observations I find following periods rather than the ones mentioned by Tonny: 0.028 d (40 min) and 0.100 d (2.4 h). Both periods show an amplitude of 0.06 magnitudes. Next to this periods the PDM method reveals weaker signals at 0.057 d and 0.088, similar as the periods found by Tonny, but these periods are resp. 2 and 3 times the period of 0.028 d. Best regards, Eric Broens ------------------------------------ VVS Werkgroep Veranderlijke Sterren Eric Broens Wateringstraat 143 B-2400 Mol BELGIUM E-Mail: Eric.Broens@advalvas.be ------------------------------------