GRB 240418A: AKO Upper Limit

We observed the field of GRB 240418A (Siegel et al., GCN 36162) with our 0.36m f/7.7 robotic telescope. We obtained 13x180s images using Ic filter on 18 April 2024, starting at 21:06UT, 42 minutes after the GRB trigger. We did not detect any credible afterglow candidate within the updated XRT position (Trigger number 1222885), down to the magnitude = 20.0 for the stacked images. The magnitude was estimated using the Atlas catalogue as a reference, and it is not corrected for galactic extinction.