HZ Her (Her X-1) multiwavelength campaign 以下のX線との同時観測の呼掛けがありました。まもなくスタートします。 Forwarded message: Date: Fri, 09 Jul 1999 14:15:44 -0400 From: Saku Vrtilek <saku@head-cfa.harvard.edu> Dear VSNET observers, We are conducting a multiwavelength campaign on Hercules X-1/ HZ Herculis from July 11-15th, 1999. This includes observations by HST and RXTE. Any optical observations of HZ her (photometric or spectroscopic) during the month of July will be useful. Thank you for your help, Saku