GCN Circular 9726
A. Melandri, C.G. Mundell, Z. Cano, R.J. Smith, I.A. Steele, S. Kobayashi, C.J. Mottram, D.F. Bersier (Liverpool JMU),A. Gomboc (Ljubljana), C. Guidorzi (INAF-OAB) report: "The 2-m Faulkes Telescope North robotically followed up GRB090728 (SWIFT trigger 358574; Mangano et al. GCN 9725) beginning about 9.6 min after the GRB trigger time. We identify a rapidly fading optical counterpart at: RA (J2000)=01:58:36.6 Dec(J2000)=+41:37:59.6 This source is not detected in our R-band images, but is detected in SDSS-I band images with i'=19.55+/-0.3 mag (at a mean time of 13.2 min after the burst) wrt USNO-B1 I-mag. Spectroscopic followup is encouraged."