GCN Circular 11655
T. N. Ukwatta (MSU), E. Sonbas (GSFC/USRA/Adiyaman Univ.), N. Gehrels (GSFC), J. Linnemann (MSU), K. Tollefson (MSU), and U. Abeysekara (MSU) We observed the Swift GRB 110205A (Beardmore et al., GCN 11629) with the Lightbuckets 0.61m rental telescope LB-0001 in Rodeo, NM, USA. Under good weather conditions, two observations were carried out in the Luminance and R filter starting 2011-02-05 at 07:45:58 UT (~ 5.7 hours after the GRB trigger) and 09:39:21 UT (~7.6 hours after the GRB trigger). Another followup observation was performed on R filter starting 2011-02-06 at 09:29:04 UT (~1.31 days after the trigger) under acceptable weather conditions. The burst afterglow is clearly detected in the first two observations and estimated magnitudes are given below: Time after trigger Exposure (s) Filter Magnitude 5.7 hours (0.24 days) 1 x 300 Lum 19.0 +/- 0.1 7.6 hours (0.31 days) 1 x 300 R 19.6 +/- 0.2 31.4 hours (1.31 days) 2 x 300 R > 20.1 The afterglow, not corrected for Galactic extinction, is calibrated against the USNO-B1.0 catalog. We acknowledge the helpful assistance of the Lightbuckets staff, in particular Stephen G. Cullen.