TITLE: GCN CIRCULAR NUMBER: 6547 SUBJECT: GRB 070616: BTA optical observations DATE: 07/06/17 05:52:23 GMT FROM: Alberto Castro-Tirado at Inst.de Astro. de Andalucia T. Fatkhullin, V. Sokolov (SAO-RAS, Russia), E. Sonbas (Cukurova Univ., Turkey), A. de Ugarte Postigo, M. Jelínek, J. Gorosabel (IAA-CSIC, Spain), D. Pérez-Ramírez (Univ. de Jaén, Spain), S. Guziy (Nikolaev St. Univ., Ukraine) and A. J. Castro-Tirado (IAA-CSIC, Spain), report: "Following the detection by SWIFT of GRB 070616 (Starling et al. GCNC 6542), we have obtained single VRI frames at the 6m BTA SAO-RAS telescope at Nizhnij Arkhyz (Russia), starting at 23:57 UT (i.e. 7.5 hr after the event). Within the SWIFT/XRT error box , we detect in all filters a faint (R ~ 22), reddened point-like source. Preliminary astrometry yielded RA (J2000) = 02 08 36.00; Dec (J2000) = +56 56 41.0 (+/- 1"), a position very close to the USNO B-1 star reported by Kann et al. (GCNC 6545). Further observations are needed to confirm if this is the optical afterglow to GRB 070616. " This message can be quoted.