TITLE: GCN CIRCULAR NUMBER: 15881 SUBJECT: GRB 140219A: the confirmation of the brightening SDSS J102406.41+062937.6 star DATE: 14/02/24 11:11:24 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, M. Pruzhinskaya, E. Gorbovskoy, D.Denisenko, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.V.Chazov, D.Kuvshinov Lomonosov Moscow State University, Sternberg Astronomical Institute K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University 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 V.Krushinski, I.Zalozhnih, A. Popov Ural Federal University, Kourovka 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) We present the reduction of the best coadded image started 2014-02-20 14:42:07, i.e. 18.92 hour after trigger time with total exposition 3960 s (Gorbovskoy et al., GCN 15871) with unfiltered 21.0 mag limit. We found the optical source inside XRT-5 error box (Mangano and Evans, GCN 15875) at automatic position: T_start = 2014-02-20 14:42:07.5 (T_start-T_trig = 18.92 h) T_mid = 2014-02-20 16:14:23.7 (T_start-T_mid = 20.45 h) T_fin = 2014-02-20 17:46:40.0 (T_start-T_fin = 22.01 h) RA 10h 24m 06.45s Dec +6d 29m 37.86s (156.021889 6.420445) with 0.7 arcsec error. Unfiltered magnitude: Mag = 19.7+/-0.3 This source coincides with SDSS J102406.41+062937.6 star. This star must be visible at archive image of this area at the same telescope (MASTER II, Tunka,2011-02-06 16:34:55 180, Lipunov et all., GCN 15879) on 4 sigma level. The absence of the SDSS J102406.41+062937.6 star confirms its brightening ~0.7 mag. But the absence of the X-ray variation of XRT-5 source (P.F. Evans, GCN15880) argues that brightening may be usual variable star and does not connect with GRB 140219A. All our limits published earlier are still valid (GCN 15871, GCN 15879 ) The coadded image is available at http://observ.pereplet.ru/images/10240645+062937.jpg The message may be cited.