MASTER: new OT inside Fermi 614103490 error-box

ATel #13821; T. Pogrosheva, V. Lipunov, E. Gorbovskoy, V. Kornilov, I. Gorbunov, N. Tiurina, O. Gress, P. Balanutsa, A. Kuznetsov, F. Balakin, V. Vladimirov, K. Zhirkov, D. Zimnukhov, A. Chasovnikov, V. Senik, D. Kuvshinov, D. Cheryasov (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, F. Podesta, C. Francile (OAFA), H. Levato (ICATE), R. Rebolo, M. Serra (IAC), D. Buckley (SAAO), N. Budnev (ISU, API), A. Tlatov (KSS of the Pulkovo Observatory), A. Gabovich, Yu. Sergienko, V. Yurkov(BSPU), V. Shumkov, E. Minkina, D. Vlasenko
on 21 Jun 2020; 12:07 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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MASTER OT J095502.14-613325.7 discovery - bright OT, amplitude >6.3

AT2020ncx
During MASTER inspection (Lipunov et al. GCN #27976) of Fermi trigger 614103490 (short GRB, see MASTER coverage map)
MASTER-OAFA auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 09h 55m 02.14s -61d 33m 25.7s on 2020-06-18.03112 UT.
The OT unfiltered magnitude is 15.7m (mlim=17.2).
The OT is seen in 2 inspect images. There is no minor planet at this place.
We have reference images since Dec 2014, for ex., at 2016-12-29.24981 UT with unfiltered mlim=18.7m, at at 2020-03-16 04:10:21UT with mlim=18.0.
There is no any sources in VIZIER database. Deep photometry and spectral observation (if there is a source yet) are required.
One of other scenario is high amplitude dwarf nova outburst. The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/095502.14-613325.7.png

MASTER Global Robotic Net