GRB 220623A: BOOTES-5/JGT optical afterglow detection

Following the detection of GRB 220623A by both Swift (Sbarufatti et al. GCNC 32243), AstroSat (Gopalakrishnan et al. GCNC 32246) and AGILE (Ursi et al. GCNC 32247), the 60cm BOOTES-5/JGT robotic telescope at Observatorio Astronomico Nacional in San Pedro Martir (Mexico) automatically responded to the burst on June 23 at 07:05:03 UT (i.e. ~ 47 s after trigger). In the first 1 s exposure image, an optical afterglow is detected at the enhanced Swift-XRT position (Beardmore et al. GCNC 32248) with a preliminary magnitude of 17.1 +- 0.2 mag (clear filter). Further observations are ongoing and encouraged. We thank the staff at San Pedro Martir Observatory for their excellent support.