TITLE: GCN CIRCULAR NUMBER: 10241 SUBJECT: GRB 091202: Liverpool Telescope observations DATE: 09/12/03 15:15:05 GMT FROM: Cristiano Guidorzi at Ferrara U,Italy C. Guidorzi (U. Ferrara), C.G. Mundell, D. Bersier, Z. Cano, N.R. Clay, S. Kobayashi, A. Melandri, C.J. Mottram, R.J. Smith, I.A. Steele (Liverpool JMU), A. Gomboc (U. Ljubljana) report on behalf of a large collaboration: On 2009 December 3 at 00:11:21 UT the 2-m Liverpool Telescope automatically began observing the INTEGRAL GRB 091202 (Mereghetti et al., GCN Circ. 10234; Mundell GCN Circ 10235) using the r', i' and z' filters, corresponding to 1.02 hours after the burst. Inside the XRT error circle (Vetere et al. GCN Circ. 10239) we do not detect any source at the following limiting magnitudes: Mid time from Total Exp Filter Magnitude trigger (hr) (s) ------------------------------------------------ 1.48 360 z' > 19.0 1.61 720 i' > 20.7 1.49 720 r' > 20.4 ------------------------------------------------ Magnitudes have been calibrated from the following nearby SDSS stars: RA Dec z' i' r' ----------------------------------------------- 138.81006 +62.53208 15.16 15.24 15.41 138.82579 +62.53708 18.73 18.73 18.90 -----------------------------------------------