TITLE: GCN CIRCULAR NUMBER: 32342 SUBJECT: GRB 220706A: LCO Optical Upper Limits DATE: 22/07/08 01:42:44 GMT FROM: Robert Strausbaugh at U. of the Virgin Islands R. Strausbaugh (U. of the Virgin Islands), A. Cucchiara (College of Marin) report on behalf of a larger collaboration: We 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. We 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). The following upper limits are calculated using the PanSTARRS catalog as reference: r>23.0 i>22.5 We 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. We performed a series of 3x300s exposures in i and r bands. The following upper limits are calculated using the PanSTARRS catalog as reference: r>22.4 i>22.4 These magnitudes are not corrected for galactic extinction. R.S. is funded by NSF AST grant #1831682