GCN Circular 33360
Subject
GRB 230217A: Gemini South optical upper limits
Date
2023-02-21T07:27:44Z (a year ago)
From
Eleonora Troja at GSFC <eleonora.troja@nasa.gov>
E. Troja (UTV) and B. O���Connor (GWU) report:
We inspected the GMOS-S observations of the short GRB 230217A reported in
O���Connor et al. (GCN Circ. 33356). At the position of the radio source
(Schroeder et al., GCN Circ 33358) coincident with the X-ray source #3
(Capalbi et al. GCN Circ. 33348), no optical counterpart is detected down
to i>23 AB mag, not corrected for Galactic extinction. The lack of optical
detection does not rule out an afterglow origin for the X-ray source and
remains consistent with a power-law spectrum with slope beta_OX < 0.6.
Further observations are encouraged to establish variability.
Our images do not cover the position of the X-ray/radio source #5, which
lies just outside the BAT error circle.
We thank the staff of the Gemini Observatory for assistance in rapidly
obtaining these observations.