Sorry about following up my own message. I forgot the URL. http://www.strw.leidenuniv.nl/~dominik/Tools/idlwave of course... - Carsten -- Carsten Dominik <dominik@astro.uva.nl> \ _ / Sterrenkundig Instituut "Anton Pannekoek" |X| _ Kruislaan 403; NL-1098 SJ Amsterdam /| |\ _ _ _/ \ phone +31 (20) 525-7477; FAX +31 (20) 525-7484 __|o|___/ ~~ \___/ ~~~