GCN Circular 17741
W. Fong and P. Milne (University of Arizona) report on behalf of a larger collaboration: "We observed the field of the Swift short-duration GRB 150423A (Pagani et al., GCN 17728) with UFTI mounted on the 3.8-m United Kingdom Infrared Telescope (UKIRT) on Mauna Kea beginning on 2015 April 23.337 UT, at an average airmass of 1.1 in 0.55" seeing. We obtained 6600 sec of J-band imaging at a mid-time of 2.72 hr post-burst, and 6300 sec of K-band imaging at a mid-time of 4.93 hr post-burst. The afterglow (Source 1; Varela et al., GCN 17732; Perley, GCN 17733; Littlejohns et al., GCN 17736; Kann et al., GCN 17738) is weakly detected in both the J- and K-bands. We cannot establish fading over the course of our observations due to the weak detection of the source. We note that Source 2 (Varela et al., GCN 17732) is only detected in K-band. Further observations are planned."