GCN Circular 8216
Subject
GRB 080906: Watcher observations
Date
2008-09-12T13:41:43Z (16 years ago)
From
Alejandro Ferrero at U College,Dublin <alejandro.ferrero@ucd.ie>
Alejandro Ferrero (UCD School of Physics), John French (UCD School of
Physics, DARK/NBI), Gary Melady (UCD School of Physics) report on
behalf of a larger collaboration:
The Watcher 40 cm robotic telescope at Boyden Observatory, South
Africa, began imaging the field of GRB 080906 (Vetere et al. GCN 8186)
at 16:51:15.5 UT, 3.6 h after the Swift triggger. We do not detect the
afterglow reported by Holland et al. (GCN 8198) and Afonso et al. (GCN
8194). Our first 120s exposure has a limiting magnitude of 16.9, while
a stacked sequence of 10 120s images, with an exposure mid-time of 3.8
hrs after the trigger, results in a limiting magnitude of 18.4.
Unfiltered magnitudes are transformed to R-band by comparison with the
USNO-B1 catalog.