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MASTER: new short optical transient

ATel #8160; O. Gress, V. Lipunov, E. Gorbovskoy, P. Balanutsa (Lomonosov MSU), D. Buckley (SAAO), V. Kornilov, N. Tiurina, A. Kuznetsov, I. Gorbunov, D. Vlasenko, V. Chazov, V. Shumkov, E. Popova (M. V. Lomonosov MSU, SAI), N. Budnev, K. Ivanov (Irkutsk State University, Applied Physics Institute), S. Potter, M. Kotze (South African Astronomical Observatory), R. Rebolo, M. Serra-Ricart, N. Lodieu, G. Israelian (The Instituto de Astrofisica de Canarias), A. Tlatov, V. Senik, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Krushinskiy (Ural Federal University), Yu. Sergienko, A. Gabovich, V. Yurkov (Blagoveschensk Educational State University)
on 13 Oct 2015; 23:31 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Request for Observations, Cataclysmic Variable, Gamma-Ray Burst, Transient, Variables

MASTER OT J234149.80-465633.6 discovery - short optical transient , no VIZIER, Ampl>3m

MASTER-SAAO auto-detection system ( Lipunov et al., Advances in Astronomy, MASTER Global Robotic Net, 2010 ) discovered OT source at (RA, Dec) = 23h 41m 49.80s -46d 56m 33.6s on 2015-10-11.81150 UT.
The OT unfiltered magnitude is 18.9m (the limit is 20.4m). There are 6 images with this OT at 2015-10-11 19:28:34, 19:32:16, 19:35:57(MASTER is twin telescope). There is no minor planet at this place. There is no object at 2015-10-11 19:40:33 and later, and on 2015-10-10 20:40:28 and earlier.
We have 1458 images of this area with m_lim_W up to 21.2, m_lim_B up to 20.8, m_lim_V up to 20.8, m_lim_R up to 20.0 without OT from 2014-12-27 19:53:19UT in MASTER-SAAO database, for ex., on 2015-08-17.98584 UT with m_lim=20.6m.
There is no any source in VIZIER database inside 5" (up to 22m)
Spectral observations are required.
The discovery and reference images are available at http://observ.pereplet.ru/images/MASTER234149.80-465633.6.jpg

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net