GRB210919A: Keck NIRC2 Kp band upper limits

We carried out follow-up observations of GRB210919A (A. Tohuvanohu et al. GCNC #30846) with Keck II, using the NIRC2 instrument with the wide camera. Observations began on September 19 at 13:48:32.649 UT , ~13.3 hours after the GRB trigger. We took 6 X 107s exposures using the Kp filter. No GRB IR counterpart was found in the NIRC2 data within the XRT error area (M. R. Goad et al. GCNC #30850). No GRB IR counterpart was found in the NIRC2 data within the XRT error area (M. R. Goad et al. GCNC #30850) to an upper limit of Kp > 21.5 mag (AB, with no Galactic extinction correction).