Gene Hanson in [vsnet-obs 5866] (http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-obs/msg05866.html) reports a bright outburst of the SU UMa-type dwarf nova, GX Cas. YYMMDD(UT) mag observer 970522.449 <141 (G. Hanson) 970526.012 <134 (G. Poyner) 970527.449 138 (G. Hanson) GX Cas is known as an SU UMa-type dwarf nova having one of the longest superhump period (Psh ~0.093 day). (cf. http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/gxcas.html) The last superoutburst of GX Cas occurred in 1996 September to October. Regards, Taichi Kato