TITLE:   GCN CIRCULAR
NUMBER:  33368
SUBJECT: GRB 230217A: Continued Gemini Observations
DATE:    23/02/22 16:50:07 GMT
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.