GCN Circular 21037
Subject
GRB 170424A: LCO Observations
Date
2017-04-25T20:23:46Z (8 years ago)
From
Antonino Cucchiara at UVI <antonino.cucchiara@uvi.edu>
A. Cucchiara, D. Morris (U. of Virgin Islands), C. Guidorzi
(U. Ferrara), B. Gendre (U. of Virgin Islands),
reports on behalf of a larger collaboration:
"On April 25.12 UT (T_0 +14.5h) we began observing the center
of the field of LAT GRB 170424A (Omodei et al. GCN #21032)
using the Las Cumbres Observatory 1m Sutherland facility.
We covered 30% of the LAT error region and we obtained a series
of observations in R and I band for a total of 6 minutes on sky in
each filter.
We identified no optical counterpart within the center of Swift-XRT
tile #20753 (Evans et al. GCN #21034), out to a radius of ~13 arcmin,
at the following 3-sigma limits:
R > 21.2 mag
I > 20.8 mag
These magnitude are calibrated against nearby USNO-B1 sources,
and are not corrected for Galactic Extinction."
Antonino Cucchiara, PhD
Assistant Professor
Physics and Astronomy
University of the Virgin Islands
Phone: 340-693-1688
College of Science and Mathematics
#2 Brewers Bay road
St. Thomas, USVI 00802