TITLE: GCN CIRCULAR NUMBER: 17154 SUBJECT: GRB141208.63: MASTER OT Detection During the Fermi Error Box inspection DATE: 14/12/09 10:19:29 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Vladimirov, E. Gorbovskoy, D.Denisenko, V. Lipunov, M.Pruzhinskaya, V.Kornilov,D.Kuvshinov, N.Tyurina, P.Balanutsa, D.Zimnukhov, A.Kuznetsov Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University V. Shumkov, E. Gorbovskoy, D.Denisenko, V. Lipunov, M.Pruzhinskaya, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa, D.Zimnukhov, A.Kuznetsov Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow 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.Krushinsky, I.Zalozhnih, A. Popov Ural Federal University, Yekaterinburg, 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) MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Kislovodsk was pointed to the GRB141208.63 17 sec after notice time and 44 sec after trigger time at 2014-12-08 15:10:43 UT. On our second (20s exposure) set we found optical transient within FERMI error-box (ra=04 55 55 dec=+69 24 00 r=16.733300) . MASTER OT J001907.27+403423.8 - new possible CV ( V. Vladimirov et al., Atel 6792). MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 00h 19m 07.27s +40d 34m 23.8s on 2014-12-08.63441 UT. The OT position is within 1" of the star APM EO1243-0352761 (bmag=22.06). Color-combined DSS finder chart is uploaded to http://master.sai.msu.ru/static/OT/J001907+403423-BRIR5x5.jpg (2x zoom). There is a possible UV counterpart GALEX J001907.4+403424 (NUV=22.51+/-0.41). Nothing is present at this position in 1RXS, 2MASS, GCVS and AAVSO VSX. This area of sky in Andromeda is not covered by SDSS. Catalina Sky Survey has two past detections in Orphan Catalogue to 16.9m on 2012 Nov. 15 and 18.4m on 2013 Sep. 16. NEAT project has 10 images on 3 different nights from 1998 Aug. 18 to 2002 Oct. 13 with no additional outbursts. Based on the amplitude of variability and previous outbursts, MASTER OT J001907.27+403423.8 is a new cataclysmic variable (dwarf nova) in Our Galaxy. The offset from M31 galaxy center (4.48 degree West, 0.70 degree South) is too large for it to be related to M31. The location in Fermi GRB error box is likely a chance coincidence. The object brightness has not changed significantly on the images obtained 4.5-5 hours after the discovery, on Dec. 08.818-08.841 UT (unfiltered magnitude 17.6-17.7). Follow up observations are encouraged. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/001907.27403423.8.png The message may be cited.