GCN Circular 33009
Subject
GRB 221202A: LCOGT Optical Upper Limits
Date
2022-12-02T22:51:53Z (a year ago)
From
Robert Strausbaugh at University of Minnesota <rstrausb@umn.edu>
R. Strausbaugh (University of Minnesota), A. Cucchiara (NASA) report on
behalf of a larger collaboration:
We observed the GRB 221202A (Caputo et al., GCN 33005) field with the LCOGT
1-meter Sinistro instrument at the South African Astronomical Observatory
site, on December 2, from 21:09 to 21:36 (corresponding to 1.05 to 1.5
hours from the GRB trigger time) with the Bessel R and I filters.
We performed a series of 3x280s exposures in each band. We do not detect
any sources in the XRT error region, in either band, consistent with other
optical upper limits (de Wet et al., GCN 33007).
The following upper limits are calculated using the USNO-B.1 catalog as
reference:
R > 20.0
I > 19.0
These magnitudes are not corrected for galactic extinction.