TITLE: GCN CIRCULAR NUMBER: 11715 SUBJECT: GRB 110213A: Lightbuckets Optical Observations DATE: 11/02/13 15:07:06 GMT FROM: Tilan Ukwatta at GSFC/GWU 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 110213A (D'Elia et al., GCN 11705) afterglow with the Lightbuckets 0.61m rental telescope LB-0001 in Rodeo, NM, USA. Under good weather conditions, four observations were carried out in the R filter starting 2011-02-13 at 05:33:14 UT (~ 15.7 mins after the GRB trigger). The burst afterglow is clearly detected in all four observations and estimated magnitudes are given below: Time after trigger Exposure (s) Filter Magnitude 15.7 mins (0.26 hours) 60 R 15.4 +/- 0.1 17.8 mins (0.30 hours) 60 R 15.5 +/- 0.1 19.9 mins (0.33 hours) 60 R 15.5 +/- 0.1 22.6 mins (0.38 hours) 60 R 15.7 +/- 0.1 The afterglow, not corrected for Galactic extinction, is calibrated against the USNO-B1.0 catalog.