TITLE: GCN CIRCULAR NUMBER: 12977 SUBJECT: GRB 120219A: MASTER prompt and early optical limit and OT discussion DATE: 12/02/21 09:04:00 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski, N.Tyurina, N.Shatskiy, P.Balanutsa, D.Zimnukhov, A.Kuznetsov, V.V.Chazov, A.Kuznetsov, A.Sankovich Sternberg Astronomical Institute, Moscow State University K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University V.Krushinski, I.Zalozhnich, A. Popov Ural State University, Kourovka V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) Claudio Mallamaci, Carlos Lopez and Federico Podest Observatorio Astronomico Felix Aguilar (OAFA) MASTER II robotic telescope (Global MASTER-Net: http://observ.pereplet.ru) located in Tunka and Ural was pointed to the GRB120219A (Swenson et al., GCN Circ 12964; Ivanov et al., GCN Circ 12965). One MASTER Very Wide Field Camera located at Tunka (D=68 mm, 420 square degrees, 11 Mpx) was observed GRB error box with 5 s exposure before, during and after GRB Trigger Time without time gap between images. Our unfiltered images are calibrated relative to Tycho stars (V). We haven`t found optical transient within enhanced SWIFT XRT error-box (Goad et al., GCN Circ 12967). Our results: T_start-T_trig T_mean-T_trig Limit Coadd Telescope Filter Site (s) (s) -9 -6.5 11.5 No VWFC (E) Unfilt Tunka -4 -1.5 11.5 No VWFC (E) Unfilt Tunka -9 33.5 13.0 18 VWFC (E) Unfilt Tunka 105 115 17.3 No MASTERII(E) P| Tunka 105 115 17.0 No MASTERII(W) P- Tunka 105 772 19.5 22 MASTERII(E+W)Unfilt Tunka 109 119 17.0 No MASTERII(W) P/ Ural 109 552 19.0 11 MASTERII(W) P/ Ural There is some marginal object at Xin et al.(GCN 12966) OT candidate position in Ural and Tunka added images with ~19 and ~20 mag correspondingly (see images). The some marginal object appear on Very Wide Field Camera at -1.5 s (mean time) and +3.5s images with 12 mag (pixel is equal 22"). But the signal/noice level is 2-3 sigma and we can not confirm or reject this candidate. The images and video are available at http://master.sai.msu.ru/static/GRB120219A/GRB120219A.html . The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.03 in the direction of the burst (Schlegel et al. 1998). The message may be cited.