MASTER: PKS 2354-02 optical flare

ATel #12091; T. Pogrosheva, V. Lipunov, E. Gorbovskoy, N. Tiurina, P. Balanutsa, V. Kornilov, A. Kuznetsov, V. Vladimirov, D. Vlasenko, D. Zimnukhov (Lomonosov Moscow State University, SAI), D. Buckley (SAAO), R. Rebolo, M. Serra-Ricart (IAC), O. Gress, N. Budnev (Applied Physics Institute, ISU), A. Tlatov, D. Dormidontov, V. Senik (Kislovodsk solar station of the Pulkovo observatory RAS), V. Yurkov, Y. Sergienko, A. Gabovich (Blagoveshchensk Educational University) V. Shumkov (MASTER team members)
on 10 Oct 2018; 08:24 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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MASTER OT J235725.15-015215.4 detection - PKS 2354-02 optical flare

MASTER-Tavrida auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 23h 57m 25.15s -01d 52m 15.4s on 2018-10-09 20:53:08 UT.
The OT unfiltered magnitude is 17.7m (limit 20.2m).
The OT is seen in 25 images.
There is PKS 2354-02 (Veron+ 2010) with V=21.2 and GALEX NUV=21.75
We have reference images without OT on 2014-07-21.89405 UT with 19.6 unfiltered magnitude limit (MASTER-Kislovodsk).
There are
m_OT=19.4 on 2010-12-24 16:06:17.002UT (MASTER-Kislovodsk),
m_OT=17.0 on 2013-11-05 12:33:51.674UT (MASTER-Tunka),
m_OT=19.3 on 2014-07-30 18:38:38.855UT (MASTER-Tunka),
m_OT=19.8 on 2016-09-27 01:24:00.054UT (MASTER-IAC),
m_OT=19.5 on 2018-07-21 22:47:36.506UT (MASTER-SAAO),
m_OT=19.0 on 2018-09-11 03:45:35.794UT (MASTER-IAC).

Spectral observations are required.
The discovery and reference images are available at
http://master.sai.msu.ru/static/OT/235725.15-015215.4.png

MASTER Global Robotic Net