{
  "body": "R. Strausbaugh (Eastern Illinois University), A. Cucchiara (NASA) report on behalf of a larger collaboration:\n\nWe observed the Swift GRB 231216A (Sbarrato et al., GCN 35378) field with the LCOGT 1-meter Sinistro instrument at the Teide Observatory, Tenerife site, on December 16, from 19:08 to 19:41 UT (corresponding to 0.55 to 1.10 hours after the GRB trigger time) with the sdss r and i filters.\n\nWe performed a series of 3x300s exposures in each band.  We do not detect an uncataloged source within the XRT error region in either band.  This result is consistent with other optcal upper limits (Hu et al., GCN 35381; Malesani et al., GCN 35382; Sharma et al., GCN 35383; Basa et al., GCN 35384; Kuin et al., GCN 35388; Sun et al., GCN 35390; Ruocco et al., 35394).\n\nThe following 5-sigma upper limits are calculated using the PanSTARRS catalog as reference:\n\nr > 22.7\ni > 22.1\n\nThese magnitudes are not corrected for galactic extinction.\n",
  "createdOn": 1702910034455,
  "subject": "GRB 231216A: LCOGT Optical Upper Limits",
  "circularId": 35395,
  "bibcode": "2023GCN.35395....1S",
  "submittedHow": "email",
  "eventId": "GRB 231216A",
  "submitter": "Robert Strausbaugh at Eastern Illinois University <rstrausbaugh@eiu.edu>"
}