GCN Circular 8064
Subject
GRB 080804: Faulkes Telescope South observations
Event
Date
2008-08-05T15:05:59Z (17 years ago)
From
Cristiano Guidorzi at INAF-OAB <cristiano.guidorzi@brera.inaf.it>
C. Guidorzi (INAF-OAB) and I. Steele (LJMU) on behalf of a
larger collaboration report:
On 2008 August 05 (12:44:12 UT) we began observing the field of GRB 080804
(Racusin et al. GCN Circ. 8057) with the Faulkes Telescope South using
the R filter.
In our coadded frame we detect the optical afterglow at the position
fully consistent with that reported by Swift-UVOT (Racusin et al. GCN
Circ. 8057) and slighly outside the error circle given by ROTSE-III
(Rujopakarn et al. GCN Circ. 8056) which is 1.5 arcsec away.
Telescope Filter T_mid[hr] Exposure[s] Mag
-----------------------------------------------------------
FTS R 14.235 1200 21.6 +/- 0.1
-----------------------------------------------------------
The calibration was performed using the R2 magnitudes of several
USNOB-1 catalogue field objects. The uncertainty reported above does
not include the additional ~0.3 mag of the USNOB-1 catalogue.
From the comparison with the value reported by UVOT we infer an
average power-law decay index of ~0.7.