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GCN Circular 12382

GRB 110918A: Liverpool Telescope optical observations
2011-09-21T22:18:29Z (13 years ago)
Drejc Kopac at Math Phys U,Slovenia <>
C. Guidorzi (U. Ferrara), D. Kopac (U. Ljubljana) and N. R. Tanvir (U.
Leicester), on behalf of a large collaboration report:

We observed the optical afterglow of GRB 110918A (Cenko et al., GCN 12367)
with the 2-m Liverpool Telescope, starting at 01:07 UT on 2011 September
21. We took 6 images in R band with exposure time 300s and we clearly
detect the optical afterglow. Our preliminary photometry yields:

Mid time from   Exp    Filter   Magnitude
trigger (days)  (sec)
2.16            1800   R        19.7 +- 0.1

The magnitude is calibrated against nearby USNO-B1.0 stars and is not
corrected for the Galactic extinction.
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