TITLE: GCN CIRCULAR NUMBER: 22784 SUBJECT: GRB 180614A: NOT optical upper limits DATE: 18/06/15 12:42:31 GMT FROM: Kasper Elm Heintz at Univ. of Iceland and DAWN/NBI Kasper E. Heintz (Univ. of Iceland and DAWN/NBI), Johan P. U. Fynbo (DAWN/NBI), Daniele B. Malesani (DAWN/NBI and DARK/NBI), Jyri J. Lehtinen (MPS), Teemu Willamo (Univ. of Helsinki), and Paco Galindo (NOT), report on behalf of a larger collaboration: We observed the field around GRB 180614A (Gropp et al., GCN 22780) with the 2.5-m Nordic Optical Telescope (NOT) equipped with StanCam. Observations of 3x100 s were carried out in the R filter and started at 04:12:59 UT on June 15, 8.93 hr after trigger. We do not detect the optical counterpart within the enhanced Swift-XRT error circle and calibrated against local photometry from the USNO-B1 catalog we measure an upper limit (at 3-sigma) of m(R) > 22.9 AB mag. This upper limit is not corrected for the Galactic extinction of A_V = 0.36 mag (Schlafly & Finkbeiner, 2011, ApJ, 737, 103) in the direction of the GRB.