{
  "bibcode": "2011GCN.11715....1U",
  "body": "T. N. Ukwatta (MSU), E. Sonbas (GSFC/USRA/Adiyaman Univ.),\nN. Gehrels (GSFC), J. Linnemann (MSU), K. Tollefson (MSU),\nand U. Abeysekara (MSU)\n\nWe observed the Swift GRB 110213A (D'Elia et al., GCN 11705)\nafterglow with the Lightbuckets 0.61m rental telescope LB-0001\nin Rodeo, NM, USA. Under good weather conditions, four\nobservations were carried out in the R filter starting\n2011-02-13 at 05:33:14 UT (~ 15.7 mins after the GRB trigger).\n\nThe burst afterglow is clearly detected in all four\nobservations and estimated magnitudes are given below:\n\nTime after trigger       Exposure (s)   Filter     Magnitude\n\n15.7  mins (0.26 hours)     60              R      15.4 +/- 0.1\n17.8  mins (0.30 hours)     60              R      15.5 +/- 0.1\n19.9  mins (0.33 hours)     60              R      15.5 +/- 0.1\n22.6  mins (0.38 hours)     60              R      15.7 +/- 0.1\n\nThe afterglow, not corrected for Galactic extinction, is\ncalibrated against the USNO-B1.0 catalog.",
  "circularId": 11715,
  "createdOn": 1297609626000,
  "email": "tilan.ukwatta@gmail.com",
  "subject": "GRB 110213A: Lightbuckets Optical Observations",
  "submitter": "Tilan Ukwatta at GSFC/GWU  <tilan.ukwatta@gmail.com>",
  "eventId": "GRB 110213A"
}