GCN Circular 9360
Subject
GRB 090515: Super-LOTIS Upper Limits
Date
2009-05-15T08:00:24Z (15 years ago)
From
Grant Williams at Steward Observatory <ggwilli@gmail.com>
G. G. Williams (MMTO), A. Updike (Clemson), 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 090515 (Swift Trigger 352108, Beardmore et al. GCN 9356) at
04:45:52 UT, 43 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 do not detect any variable sources or afterglow candidates within
the XRT error box in our earliest exposure to the following 3-sigma
limiting magnitude determined using nearby USNO-B1.0 stars. We also
do not detect any afterglow candidate in later images and sets of
combined images:
t_start (UT) exp t (s) t_start-t_0 (s) Limit
----------------------------------------------------------------
04:45:52 10 43 R > 17.7