{
  "bibcode": "2022GCN.32342....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 Swift GRB 220706A (D'Ai et al., GCN 32329) field with the Siding Spring Observatory, Australia site, on July 6, from 18:15 to 18:52 (corresponding to 2.10 to 2.72 hours from the GRB trigger time) with the SDSS r and i filters.\n\nWe performed a series of 3x300s exposures in i and 2x300 and 1x135 r bands (the last r-band observation was interrupted).  We do not detect an optical counterpart within the XRT enhanced error region (Goad et al., GCN 32333) in either band, consistent with other non-detections (Gendre et al., GCN 32331; Lipunov et al., GCN 32332; Jiang et al., GCN 32335; de Ugarte-Postigo et al., GCN 32338; Guelbenzu et al., GCN 32339).\n\nThe following upper limits are calculated using the PanSTARRS catalog as reference:\n\nr>23.0\ni>22.5\n\nWe also observed with the LCO 1-m Sinistro instrument at the Teide Observatory, on Tenerife, on July 7, from 04:25 to 04:52 UT (corresponding to 12.27 to 12.72 hours from the GRB trigger time) with the SDSS r and i filters.\n\nWe performed a series of 3x300s exposures in i and r bands.\n\nThe following upper limits are calculated using the PanSTARRS catalog as reference:\n\nr>22.4\ni>22.4\n\nThese magnitudes are not corrected for galactic extinction.\n\nR.S. is funded by NSF AST grant #1831682",
  "circularId": 32342,
  "createdOn": 1657244564000,
  "email": "robert.strausbaugh@uvi.edu",
  "subject": "GRB 220706A: LCO Optical Upper Limits",
  "submitter": "Robert Strausbaugh at U. of the Virgin Islands  <robert.strausbaugh@uvi.edu>",
  "eventId": "GRB 220706A"
}