TITLE: GCN CIRCULAR NUMBER: 19962 SUBJECT: GRB 160927A: Bassano Bresciano Observatory optical upper limit DATE: 16/09/28 11:26:02 GMT FROM: Ulisse Quadri at Bassano Bresciano Obs U.Quadri, L.Strabla and R.Girelli report: We imaged the field of GRB 160927A detected by SWIFT(trigger 713782) with the robotic telescope of (IAU station 565) Bassano Bresciano Observatory, Italy. Member of: AAVSO - American Association of Variable Star Observers. ISSP - Italian Supernovae Search Project. UAI/SSV - Unione Astrofili Italiani/sezione stelle variabili. The observations started 11.72 min after the GRB trigger, with our Newton telescope D=250 mm F/D=4.8. Weather conditions were good. We co-added 52 exposures of 60 sec each. Start T0+ End T0+ CV lim 11.72 min 65.71 min 19.5 We did not found any optical counterpart in the error box of the XRTcandidate. S. L. Gibson (U Leicester), N. Gehrels (NASA/GSFC), et al. Magnitudes were estimated with the UCAC4 cat. and are not corrected for galactic dust extinction. Reference: http://www.osservatoriobassano.org/GRB.asp The message may be cited.