GCN Circular 7443
Subject
GRB 080319C: Early Super-LOTIS Observations
Date
2008-03-19T13:30:10Z (17 years ago)
From
Grant Williams at Steward Observatory <ggwilli@gmail.com>
G. G. Williams (MMTO) and P. A. Milne (Steward Observatory), on behalf
of the Super-LOTIS Collaboration, report:
The robotic 0.6-m Super-LOTIS telescope began observing the error box
of GRB 080319C (Swift Trigger 306778, Pagani et al. GCN 7442) at
12:26:38.5 UT, 42.5 seconds after the trigger. Our initial
observations include 5 x 10s exposures, 5 x 20s exposures, and 30 x
60s exposures, all in the R-band.
We detect the afterglow reported by Li et al. (GCN 7441) in our
earliest 10 second exposure. Using the USNO-B1.0 star (453-025776) at
RA=17:15:51.7, Dec=55:23:38.4 with R2MAG=14.61, we estimate the
following R-band magnitude for the OT:
t_start (UT) exp t (s) t_start-t_0 (s) R Mag
----------------------------------------------------------------
12:26:38.5 10 42.5 R = 16.83 +/- 0.13
Additional observations and analysis are ongoing.