{
  "bibcode": "2022GCN.32367....1S",
  "body": "R. Strausbaugh (U. of the Virgin Islands), A. Cucchiara (College of Marin) report on behalf of a larger collaboration:\n\nWe observed the Fermi/Swift GRB 220711B (Fermi GBM Team, GCN 32365; D'Ai et al., GCN 32366) field with the Teide Observatory, Tenerife site, on July 11, from 21:05 to 21:23 (corresponding to 2.82 to 3.12 hours from the GRB trigger time) with the SDSS r and i filters.\n\nWe performed a series of 2x335s exposures in i and r bands.  We do not detect an optical counterpart within the XRT error region (D'Ai et al., GCN 32366) in either band.\n\nThe following upper limits are calculated using the PanSTARRS catalog as reference:\n\nr>21.54\ni>21.34\n\nThese magnitudes are not corrected for galactic extinction.\n\nR.S. is funded by NSF AST grant #1831682",
  "circularId": 32367,
  "createdOn": 1657577968000,
  "email": "robert.strausbaugh@uvi.edu",
  "subject": "GRB 220711B: LCO Optical Upper Limits",
  "submitter": "Robert Strausbaugh at U. of the Virgin Islands  <robert.strausbaugh@uvi.edu>",
  "eventId": "GRB 220711B"
}