TITLE: GCN CIRCULAR NUMBER: 6309 SUBJECT: Infrared detection of GRB070419A with UKIRT DATE: 07/04/19 14:10:53 GMT FROM: Evert Rol at U.Leicester E. Rol, N. Tanvir (U. of Leicester), T. Kerr (JAC), report for a larger collaboration: We observed the field of GRB070419A with UKIRT-WFCAM, starting 39 minutes after the GRB trigger (Stamatikos et al., GCN 6302). We find the following magnitudes for the infrared counterpart of GRB070419A: T filter magn error(magn) (hours post trigger) -------------------------------------------------- 0.654 J 18.27 0.08 0.734 H 17.83 0.13 0.814 J 18.56 0.09 0.896 K 17.26 0.18 1.665 K 18.30 0.18 The magnitudes are calibrated with respect to the 2MASS catalogue.