TITLE: GCN CIRCULAR NUMBER: 7801 SUBJECT: GRB080604: confirmation of optical afterglow DATE: 08/06/04 08:04:00 GMT FROM: Evert Rol at U.Leicester E. Rol (U. Leicester), C. Guidorzi (INAF-OAB), A. Gomboc (U. Ljubljana), I.A. Steele (Liverpool JMU), P. O'Brien (U. Leicester), A, Melandri, D. Bersier, C.G. Mundell, R.J. Smith, D. Carter, S. Kobayashi, M. Burgdorf, M. Bode (Liverpool JMU), N. Bannister, N. Tanvir (U. Leicester) report: The Faulkes Telescope North observed the position of GRB080604. We confirm the detection of an optical transient (La Parola, GCN 7800), with a position of (J2000): RA = 15 47 51.65 Dec = +20 33 28.1 In the first 10 second exposure, starting 5:42 minutes after the BAT trigger, we estimate a magnitude of R = 20.12 +/- 0.15 with respect to the USNO-B1.0 star at 15:47:52.50, +20:34:24.4.