[vsnet-grb-info 7816] GRB 090515: Super-LOTIS Upper Limits
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Fri May 15 17:00:39 JST 2009
TITLE: GCN CIRCULAR
NUMBER: 9360
SUBJECT: GRB 090515: Super-LOTIS Upper Limits
DATE: 09/05/15 08:00:24 GMT
FROM: Grant Williams at Steward Observatory <ggwilli at 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
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