GRB230618A: LCOGT Optical Observations

We observed the GRB 230618A (Page et al., GCN 33989) field with the LCOGT 1-meter Sinistro instrument at the McDonald Observatory, Texas, USA site, on June 18, from 04:31 to 05:03 UT (corresponding to 0.33 to 1.20 hours from the GRB trigger time) with the SDSS r and i filters. We performed a series of 3x300s exposures in each band. We detect an uncatalouged source within the Swift-XRT enhanced error region (P.A. Evans et al., GCN 33990). The following magnitudes are calculated using the PanSTARRS catalog as reference: r = 20.62 +/- 0.02 i = 19.16 +/- 0.02 These magnitudes are not corrected for galactic extinction.