GCN Circular 35399
Subject
GRB 231216A: optical upper limits from the INAF Asiago Observatory
Date
2023-12-18T16:58:09Z (5 months ago)
From
Paolo D'Avanzo at INAF-OAB <pda.davanzo@gmail.com>
Via
legacy email
A. Reguitti (INAF-OAB / INAF-OAPd), P. D'Avanzo (INAF-OAB), I. Salmaso (INAF -OAPd), E. Cappellaro (INAF -OAPd),
report on behalf of the CIBO and of the GRAWITA collaborations:
We observed the field of GRB 231216A (Sbarrato et al., GCN Circ. 35378) from the INAF - Padova Astronomical Observatory
located in Asiago (Italy) with the 1.8m Copernico telescope starting on 2023-12-16 at 20:24:48 UT (~ 1.8 hours after the burst).
The observations have been carried out with the AFOSC camera in imaging mode using the r filter.
No optical afterglow candidate is detected within the XRT error circle (Sbarufatti et al., GCN Circ .35391) down to a 3sigma
limiting magnitude of r ~ 22.0 (AB; calibrated against the PanSTARRS catalogue).