[vsnet-grb-info 10269] GRB 110213A: Lightbuckets Optical Observations

[GCN Circulars]

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  <tilan.ukwatta at gmail.com>

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.