GCN Circular 16409
D. A. Perley (Caltech) reports: I imaged the field of GRB 140614B (Page et al., GCN 16394) using MOSFIRE on the Keck I 10m telescope in the Ks-band filter. A sequence of 12 36-second images was obtained at a midtime of 13:18 UT on 2014-06-15 (1.27 days after the Swift trigger). No sources are detected within the XRT error circle (Evans et al, GCN 16395) to a limiting mag of approximately Ks > 21.9 mag (3-sigma, calibrating relative to 2MASS.) A faint source (Ks = 21.5 +/- 0.2 mag) is detected outside the XRT error circle, at a position of RA = 21:30:31.364, dec = +14:55:48.79 (J2000).