GCN Circular 33119
Subject
GRB 221226B: LCOGT Optical Upper Limits
Date
2022-12-28T22:28:46Z (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 221226B (Cenko et al., GCN 33108) field with the LCOGT
1-meter Sinistro instrument at the South African Astronomical Observatory
site, on December 27, from 19:40 to 20:07 UT (corresponding to 20.98 to
21.47 hours from the GRB trigger time) with the SDSS r and i filters.
We performed a series of 3x300s exposures in each band. We do not detect
any new sources in the XRT error region, in either band.
The following upper limits are calculated using the SkyMapper catalog as
reference:
r > 20.75
i > 20.16
These magnitudes are not corrected for galactic extinction.