TITLE: GCN CIRCULAR NUMBER: 16144 SUBJECT: GRB 140423A optical observations with pODI/WIYN at KPNO DATE: 14/04/23 09:49:53 GMT FROM: Dieter Hartmann at Clemson.U A. Kaur (Clemson U.), A. Delgado-Navarro (Clemson U.), D. Harbeck (WIYN Observatory), M. Riabokin (NOAO), M. Orio (INAF, UW Madison), D. H. Hartmann (Clemson U.) report on behalf of a larger collaboration: We imaged the location of the Swift detected GRB 140423A (Sonbas et al., GCN 16142) with the pODI instrument on the 3.5 m WIYN telescope at KPNO ( http://www.wiyn.org/ODI/About/wiynpODI.html). Observations in the ODI r' band began at 09:40:38 UT on 23 April 2014. We clearly detect the optical afterglow candidate indicated by Elenin et al. (GCN 16143) in individual exposures beginning at this time.