TITLE: GCN CIRCULAR NUMBER: 16260 SUBJECT: GRB 140508A: Mondy upper limit DATE: 14/05/13 14:17:02 GMT FROM: Alexei Pozanenko at IKI, Moscow A. Volnova (IKI), E. Klunko (ISTP), M. Eselevich (ISTP), I. Korobtsev (ISTP), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of GRB 140508A (Yu et al., GCN 16224) with AZT-33IK telescope of of Sayan observatory (Mondy) starting on May, 12 (UT) 15:32:03. Within enhanced Swift-XRT error circle (Amarel-Rogers et al., GCN 16232) we do not detect the optical source reported by Singer et al. (GCN 16226). Details of the photometry are the following: date UT start t-T0 Exp. Filter UpperLimit (mid, days) (s) (3sigma) 2014-05-12 15:32:03 4.56124 60x120 R 22.9 The photometry is based on a reference star from SDSS-DR9, (R mag, transformation by Lupton 2005): SDSS_id R(Lupton) err J170144.75+464707.7 18.272 0.018