TITLE: GCN CIRCULAR NUMBER: 16499 SUBJECT: GRB 140629A: SAO RAS monitoring DATE: 14/07/01 13:41:18 GMT FROM: Vladimir Sokolov at SAO RAS A. Moskvitin (SAO-RAS, N. Arkhyz), R. Burenin (IKI, Moscow), R. Uklein, V. Sokolov, T. Sokolova (SAO-RAS, N. Arkhyz), on behalf of a larger collaboration, report: We performed the photometrical monitoring of the GRB 140629A OT (Lien et al., GCNC 16477) with two optical telescopes of SAO RAS: the 6-m BTA (V band) and the 1-m Zeiss-1000 (BVRcIc bands) on the night of June, 29/30. Observations started 4.1 hours after the Swift trigger. The optical transient (Lien et al., GCNC 16477; Yurkov et al., GCNC 16478; Bikmaev et al., GCNC 16482; Masi, GCNC 16483; Maehara, GCNC 16484; Malesani et al., GCNC 16485; Sonbas et al., GCNC 16486; and other teams) is clearly detected in every single image. On the basis of the same star from USNO-B1 as Bikmaev et al. (GCNC 16482) with the coordinates R.A., = 16:35:59.9, Decl.= +41:51:10, J2000 and magnitude R1_mag = 16.49 we made preliminary photometric estimations of the OT Rc images. The results are as follows: # Start,UT exp,s R_mag +/- err ==================================== 1 19:00:41 180.00 18.02 +/- 0.05 2 19:05:38 180.00 18.20 +/- 0.05 3 19:11:11 180.00 18.45 +/- 0.07 4 19:28:39 300.00 18.25 +/- 0.04 5 20:03:55 300.00 18.53 +/- 0.04 6 20:26:36 300.00 18.58 +/- 0.04 7 20:53:25 300.00 18.87 +/- 0.04 8 22:10:17 300.00 19.00 +/- 0.05 9 22:33:32 300.00 19.11 +/- 0.05 10 22:57:16 300.00 19.00 +/- 0.05 11 23:25:27 300.00 19.31 +/- 0.09 12 23:49:07 300.00 19.38 +/- 0.11 Further analysis and observations go on.