MASTER-SAAO: new OT with amplitude more then 5.4m

ATel #13787; T. Pogrosheva, V. Lipunov, V. Kornilov, E. Gorbovskoy, N. Tiurina, K. Zhirkov, O. Gress, P. Balanutsa, I. Gorbunov, A. Kuznetsov, V. Vladimirov, A. Chasovnikov, D. Vlasenko, F. Balakin, D. Zimnukhov, D. Cheryasov, V. Senik, E. Minkina, V. Grinshpun, V. Shumkov, V. Topolev, A. Pozdnyakov (Lomonosov MSU), D. A. H. Buckley (SAAO), R. Podesta, F. Podesta, C. Francile (OAFA), H. Levato (SJNU), N. M. Budnev(ISU, API), A. Gabovich, Yu. Sergienko(BSPU), R. Rebolo, M. Serra-Riscart, (IAC), A. Tlatov, D. Dormidontov(Kislovodsk Solar Station of the Pulkovo Observatory)
on 7 Jun 2020; 08:34 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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MASTER OT J140100.89-813824.8 discovery - new OT, ampl>5.4m

AT2020lud
MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 14h 01m 00.89s -81d 38m 24.8s on 2020-06-06.85286 UT.

The OT unfiltered magnitude is 16.6m(mlim=18.5).
The OT is seen in 2 images. There is no minor planet at this place.
We reobserved it at MASTER-OAFA at 2020-06-07 08:01:20 with m_OT=16.5
. We have reference images without OT since Dec2014, for ex., on 2019-06-23.86831 UT with unfiltered mlim= 20.2, nearest in time at 2020-06-02 20:08:29 with mlim=18.3, 2020-05-27 18:34:18 with mlim=19.1.
There is no any sources in VIZIER database, it means 22m POSS limit and more then 5.4m of current outburst amplitude.
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/140100.89-813824.8.png

MASTER Global Robotic Net