GCN Circular 8099
Subject
GRB 080810: Liverpool and Faulkes North observations
Date
2008-08-12T15:32:08Z (16 years ago)
From
Cristiano Guidorzi at INAF-OAB <cristiano.guidorzi@brera.inaf.it>
C. Guidorzi (INAF-OAB), D. Bersier (LJMU) and N. Tanvir (U. Leicester)
report on behalf of a larger collaboration:
We observed GRB 080810 (Page et al. GCN Circ. 8080) with the 2 m Liverpool
and Faulkes North telescopes starting on August 11 (23:34:09 UT) and
12 (13:14:49 UT), respectively, with r' and i' filters.
We clearly detect the afterglow with the following magnitudes:
Telescope Filter T_mid[hr] Exposure[s] Mag
-------------------------------------------------------------
LT i' 34.657 6x300 20.01 � 0.06
LT r' 39.525 6x300 20.78 � 0.05
FTN i' 48.367 5x300 20.38 � 0.04
-------------------------------------------------------------
The calibration was performed using nearby USNOB1 stars as described
in our previous report (Guidorzi et al. GCN Circ. 8093).
Combining with our previous observation, we derive a power-law index
of 0.94 � 0.05 from 15 to 48 hr post burst, thus confirming the
flattening of the optical decay, in agreement with Galeev et al.
(GCN Circ. 8098).