GCN Circular 11052
Subject
GRB 100805A: Liverpool Telescope afterglow observations
Event
Date
2010-08-05T06:08:10Z (15 years ago)
From
Andreja Gomboc at LT,ARI,Liverpool JMU <ag@astro.livjm.ac.uk>
A. Gomboc (U. Ljubljana), C. Guidorzi (U. Ferrara), D. Kopac (U. Ljubljana)
report on behalf of a larger collaboration:
On 2010 August 05 at 04:14:32 UT the 2-m Liverpool
Telescope automatically began observing the Swift GRB 100805A
(Hoversten et al., GCN Circ. 11047) with Ringo 2 instrument, continuing
with multi-filter (g', r', i') observations at 6.7 min after the GRB trigger.
The LT-TRAP procedure automatically identified the optical afterglow
at the UVOT position (Hoversten et al., GCN Circ. 11047, Cenko, GCN Circ. 11050)
with the following magnitudes:
------------------------------------------------------------------------
T-t0 (s) Exp. (s) Filter Mag
------------------------------------------------------------------------
400 10 r' 17.92 +- 0.07
421 10 r' 17.93 +- 0.07
726 10 r' 18.36 +- 0.10
3386 60 r' 19.79 +- 0.12
------------------------------------------------
We confirm the power-law decay index of 0.8 found by P60 (Cenko, GCN Circ. 11051).
Magnitudes were calibrated from nearby USNOB1.0 R2 stars.
Observations are continuing.