MASTER: OT outbursts with amplitude more then 6.5m and 3m

ATel #12781; T. Pogrosheva, V. Lipunov (Lomonosov MSU), D. Buckley (SAAO), R. Podesta, F. Podesta, C. Francile (OAFA SJNU), H. Levato (ICATE SJNU), E. Gorbovskoy, N. Tiurina, P. Balanutsa, V. Kornilov, D. Zimnukhov, A. Kuznetsov, D. Vlasenko, V. Vladimirov, I. Gorbunov, A. Chasovnikov, F. Balakin, V. Grinshpun (Lomonosov MSU), R. Rebolo, M. Serra (IAC), O. Gress, N. Budnev, O. Ershova (ISU), V. Yurkov, Y. Sergienko, A. Gabovich (BSPU), V. Senik, A. Tlatov, D. Dormidontov (Kislovodsk solar station of the Pulkovo observatory RAS)
on 20 May 2019; 12:19 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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MASTER OT J152724.06-482247.8 discovery - ampl>6.5m

MASTER-OAFA auto-detection system discovered OT source at (RA, Dec) = 15h 27m 24.06s -48d 22m 47.8s on 2019-05-17.33909 UT.
The OT unfiltered magnitude is 15.5m (mlim=16.8m).
The OT is seen in 6 images. There is no minor planet at this place.
We have reference image without OT on 2018-09-11.09465 UT with mlim=17.9m.
There is no sources in USNO-B1, that means 22m POSS limit in history and more then 6.5m of current outburst amplitude
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/152724.06-482247.8.png

MASTER OT J135419.39-385131.1 detection - outburst with ampl>3m

MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 13h 54m 19.39s -38d 51m 31.1s on 2019-05-19.98034 UT.
The OT unfiltered magnitude is 16.7m (mlim=18.0).
The OT is seen in 5 images. There is no minor planet at this place.
We have reference images on 2017-06-29.91308 UT with unfiltered mlim= 19.5m, on 2019-01-06 00:08:36Ut with mlim=19.7 (MASTER-SAAO, that gives more then 3m of current outburst amplitude), on 2019-04-14 02:08:11UT with mlim=18.6 (MASTER-OAFA)
There is USNO-B1 star with known B2=20.3, R1=19.9
It was also detected by ATLAS and ASAS, but as SN submitted to TNS (ATLAS19imc), but this is CV , to be a superluminous SN it had to be brighter our 18.6 limit on 2019-04-14.
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/135419.39-385131.1.png

MASTER Global Robotic Net