MASTER: high amplitude OT (>6.5m) outburst and UVCet flare

ATel #15173; P. Balanutsa, V. Lipunov, K. Zhirkov, E. Gorbovskoy, A. Kuznetsov, O. Gress, G. Antipov, D. Vlasenko, D. Zimnukhov, V. Senik, V. Topolev, A. Chasovnikov, E. Minkina, V. Grinshpun, D. Cheryasov, Ya. Kechin, Ya. Kechin, T. Pogrosheva, V. Shumkov (Lomonosov MSU), R. Rebolo, M. Serra(IAC), D. A. H. Buckley (SAAO), N. M. Budnev (ISU, API), R. Podesta, C. Lopez, F. Podesta, C. Francile (OAFA), A. Tlatov, D. Dormidontov (KSS, Pulkovo observatory), A. Gabovich(BSPU)
on 21 Jan 2022; 15:23 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

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MASTER OT J173432.09+191254.2 discovery - new OT, dwarf nova outburst, ampl>6.5m

MASTER-Kislovodsk auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
during own survey detected new optical transient source at (R.A.,Dec 2000) = 17h 34m 32.09s +19d 12m 54.2s on 2022-01-20.14418 UT.
The OT unfiltered magnitude is 15.7m (mlim=17.6m).
The OT is seen in 3 images. There is no minor planet at this place.
We have reference image on 2015-08-14.75668 UT with unfiltered mlim=21m.
There is no known sources in VIZIER at this position.
But there is non-catalogued blue OT at PanSTARR images, taking into account neighbouring faint stars with known rmag~22, the amplitude of current OT outburst is more then 6.5mag.
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/173432.09191254.2.png

MASTER OT J130738.14+210242.9 discovery possible UV Ceti

MASTER-Amur auto-detection system discovered the flash of OT source at (RA, Dec) = 13h 07m 38.14s +21d 02m 42.9s on 2022-01-19.67195 UT.
The OT unfiltered magnitude is 15.4m (mlim=17.3m).
The OT is seen in 2 images. There is no minor planet at this place.
We have 1 images for this night without object 2022-01-19.66082UT with mlim=17.2m.
We have also reference image on 2019-01-05.85213 UT with unfiltered mlim=17.1m, 2017-05-30 02:28:55UT with mlim=20.5m.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/MASTEROTJ130738.14+210242.9.jpg

MASTER Glonal Robotic Net