{
  "body": "A. Reguitti (INAF-OAB / INAF-OAPd), P. D'Avanzo (INAF-OAB), I. Salmaso (INAF -OAPd), E. Cappellaro (INAF -OAPd), \nreport on behalf of the CIBO and of the GRAWITA collaborations: \n\n\nWe observed the field of GRB 231216A (Sbarrato et al., GCN Circ. 35378) from the INAF - Padova Astronomical Observatory \nlocated 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). \nThe observations have been carried out with the AFOSC camera in imaging mode using the r filter. \n\nNo optical afterglow candidate is detected within the XRT error circle (Sbarufatti et al., GCN Circ .35391) down to a 3sigma \nlimiting magnitude of r ~ 22.0 (AB; calibrated against the PanSTARRS catalogue).\n\n",
  "createdOn": 1702918689726,
  "submitter": "Paolo D'Avanzo at INAF-OAB <pda.davanzo@gmail.com>",
  "subject": "GRB 231216A: optical upper limits from the INAF Asiago Observatory",
  "circularId": 35399,
  "eventId": "GRB 231216A",
  "submittedHow": "email-legacy",
  "bibcode": "2023GCN.35399....1R"
}