GCN Circular 33368
Subject
GRB 230217A: Continued Gemini Observations
Date
2023-02-22T16:50:07Z (a year ago)
From
James Gillanders at University of Rome Tor Vergata <jhgillanders.astro@gmail.com>
J. Gillanders (UTV), B. O'Connor (UMD, GWU) and E. Troja (UTV) report:
We performed further follow-up of the short GRB 230217A (Moss et al. GCN
33339, Svinkin et al. GCN 33349, Veres et al. GCN 33353) using the GMOS
instrument at Gemini-South. Observations were carried out in the i-band
and began at 08:55:27 on 2023-02-21, corresponding to ~3.5 d after the
GRB trigger.
Following recent XRT observations, X-ray source 3 has been confirmed to
fade with >3-sigma significance, and thus is likely the GRB afterglow
(Capalbi et al. GCN 33365). By performing image subtraction between the
two Gemini observations (see also O���Connor et al. GCN 33356, Troja et
al. GCN 33360) we find no sign of variability and place a limit of i>23
AB mag over the entire XRT error circle.
At the position of the radio source #3 (Schroeder et al. GCN 33358), we
set an upper limit of i>24.3 AB mag at 3.5 d post-burst. This value is
not corrected for Galactic extinction.
We thank the staff of the Gemini Observatory for executing these observations.