GCN Circular 27733
Subject
GRB 200512A: LCO Optical Upper Limits
Date
2020-05-13T20:46:43Z (4 years ago)
From
Robert Strausbaugh at U. of the Virgin Islands <robert.strausbaugh@uvi.edu>
R. Strausbaugh (U. of the Virgin Islands), A. Cucchiara (U. of the Virgin Islands/College of Marin) report on behalf of a larger collaboration:
We observed Swift GRB 200512A (Simpson et al., GCN 27726) with the LCO 1-m Sinistro instrument at the Siding Spring Observatory, Australia site, on May 13, from 19:03 to 19:25 UT (corresponding to 23.50 to 23.87 hours from the GRB trigger time) with the Bessel I and R filters.
We performed a series of 5x120s exposures in R and I. We do not detect any fading sources in the individual frames (or in stacked images). Using the USNO-B.1 catalog as reference, we obtain the following 3-sigma upper limits:
R > 20.90
I > 20.29
These magnitudes are not corrected for galactic extinction.
R.S. is funded by NSF AST grant #1831682