GCN Circular 4474
Subject
GRB 060110a: RAPTOR detection of early optical emission.
Event
Date
2006-01-10T19:55:23Z (20 years ago)
From
Przemyslaw R. Wozniak at LANL <wozniak@lanl.gov>
P.R. Wozniak, W.T. Vestrand, J. Wren, R. White, S. Evans
of Los Alamos National Laboratory report:
Our autonomous Raptor-S telescope responded to Swift trigger
176702 (Zane et al. GCN 4463) at 08:01:42.42 UT (6.8 seconds
after receiving the trigger). We clearly detect a fading optical
source at the location of the IR counterpart identified by Bloom et al.
(GCN 4471). The measurements show that the optical counterpart faded
from magnitude R=16.1+/-0.1 (5-second exposure) to about 17.5 over
the first ten minutes. Our unfiltered magnitudes were calibrated
using R2 magnitudes of the field sources in USNO B1.0 catalog.