MASTER OT J041934.57-545903.4 - OT in NGC 1566 direction

ATel #15566; Ya. Kechin, V. Lipunov (Lomonosov MSU), D. Buckley (SAAO), K. Zhirkov, N. Tiurina, O. Gress, V. Senik, A. Gabovich, P. Balanutsa, G. Antipov, E. Gorbovskoy, A. Kuznetsov, D. Vlasenko, A. Chasovnikov, V. Topolev, Yu. Tselik (Lomonosov MSU), C. Francile, R. Podesta, F. Podesta (OAFA), Carrasco Bazua Luis, Chavushyan Vahram, Martínez Carranza Javier, Patiño Álvarez Victor Manuel, Rossio Corella, Rodriguez M. Lino Héctor, Valdés José Ramon (INAOE/OAGH), N. Budnev (ISU), V. Yurkov (BSPU), A. Tlatov, D. Dormidontov (Kislovodsk Solar station of Pulkovo observatory)
on 23 Aug 2022; 07:24 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

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MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 04h 19m 34.57s -54d 59m 03.4s on 2022-08-23.14338 UT.
The OT unfiltered magnitude is 18.0m (mlim=18.2).
The OT is seen in 3 images. There is no minor planet at this place.
We have >6000 reference unfiltered images in the same photometrical system (MASTER has identical equipment) since 2014-12-27 without previous outbursts registration, for ex.:
Date,time(UT) m_lim
2022-08-17 04:02:14 17.5
2022-08-06 03:47:55 18.3
2018-07-30 02:41:05 20.3(in B filter)
2017-01-17 19:32:01 20.0
2016-12-25 22:24:24 19.9
2016-09-28 21:24:27 20.0
2015-02-14 21:32:43 20.0
We reobserved it at MASTER-OAFA at 2022-08-23 06:42:28UT (in 3 hours) with mOT=17.9.

There is a source with gmag=24.6,rmag=24.2 in VIZIER database (DES data release). This OT is in 222.3"W, 167.3"S from the center of NGC 1566.
Spectral observations and photometry are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/041934.57-545903.4.png

MASTER Global Robotic Net