GCN Circular 3439
Subject
RBO Observations of GRB050520
Event
Date
2005-05-20T15:22:22Z (20 years ago)
From
Ron Canterna at U of Wyoming <canterna@uwyo.edu>
D. Allen, C. Rodgers and R. Canterna report
on behalf of the RBO Team of the FUN GRB Collaboration:
We observed the position of the afterglow of GRB 050520
(Gotz et al., GCN 3430; Kennea et al., GCN 3434)
with the Red Buttes Obse rvatory 24-inch telescope
under semi-photometric conditions in VRI bands,
all 10 minutes exposures on JD2453510.6. Within a FOV
of 8 arcmin of the Swift position (GCN 3434)
we do not detect the afterglow or no new source
down to the following limiting values:
UT Start Time Filter Limiting
Since GRB (hr) Magnitude
03:39 3:34 V 19.5
03:51 3:45 R 19.5
04:01 3:55 I 18.3
04:12 4:06 V 19.4
04:23 4:17 R 19.7
04:34 4:28 I 18.4
04:46 4:40 V 19.6
04:56 4:50 R 19.4
05:07 5:11 I 19.0
05:19 5:13 V 19.6
05:29 5:23 R 19.8
05:40 5:44 I 18.8
10 sigma limiting magnitudes were derived from the USNO-B1.0 catalogue and
photometric transformations from Landolt standards.