The star SW UMa indeed is interesting and shows a few types of outbursts, most of which are considered superoutbursts. See the collection in ApJ, 1994, 453, 454. Fig 9. Steve Howell Dr. Steve B. Howell Planetary Science Institute, Astrophysics Group 620 N. 6th Ave. Tucson, AZ 85705 USA Phone (520) 622-6300 Fax (520) 622-8060 e-mail: howell@frankenstein.psi.edu homepage: http://vsnet.psi.edu/