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MASTER discoveries: dwarf novae, PSN, OT in Andromeda direction

ATel #9470; V. Shumkov, O. Gress, P. Balanutsa, V. Lipunov (Lomonosov MSU), R. Rebolo Lopez, M. Serra Ricart (IAC), E. Gorbovskoy, N. Tiurina, A. Kuznetsov, V. Kornilov, K. Ivanov (Lomonosov Moscow State University)
on 7 Sep 2016; 20:55 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical

Referred to by ATel #: 9554

MASTER OT J004126.22+414350.0 discovery - OT in Andromeda galaxy, CV?

MASTER-IAC auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L ) discovered OT source at (RA, Dec) = 00h 41m 26.22s +41d 43m 50.0s on 2016-09-02.12339 UT.
The OT unfiltered magnitude is 19.7m, mlim=20.0
The OT is seen in 14 images. We have reference image without OT on 2016-07-04.19304 UT with unfiltered magnitude limit 21.3m.
We have reference image without OT on 2016-08-08 04:27:31UT with m_lim=20.0.
And we have marginally seen ot with m_OT <~ mlim=20.0 on 2016-08-12 04:21:28UT.
This OT and 2013-11b (ATEL #5640) star can be the same object, but not LPV from its quick current ourburst
Spectral observations are required.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/004126.22414350.0.png

MASTER OT J204627.96+242218.0 discovery - dwarf nova outburst, ampl>4.7m

MASTER-IAC auto-detection system discovered OT source at (RA, Dec) = 20h 46m 27.96s +24d 22m 18.0s on 2016-09-06.93512 UT with unfiltered m_OT=15.5m, mlim=18.9m.
The OT is seen in 8 images.We have reference image without OT on 2015-09-16.89916 UT with m_lim=20.2m, so current outburst has ampl>4.7m
The discovery and reference images are http://master.sai.msu.ru/static/OT/204627.96242218.0.png

MASTER OT J230921.67+033221.4 discovery - PSN(17.7mag) in Sloan galaxy(20.4) - possibly superluminous or CV?

MASTER-IAC auto-detection system discovered OT source at (RA, Dec) = 23h 09m 21.67s +03d 32m 21.4s on 2016-09-07.00157 UT with unfiltered m_OT=17.7m (mlim=19.8).
The OT is seen in 2 images. We have reference image without OT on 2015-09-07.01252 UT with mlim=20.3m.
There is SDSS J230921.68+033220.7 star in 0.7" with red m=20.42, classified as galaxy
The discovery and reference images: http://master.sai.msu.ru/static/OT/230921.67033221.4.png

MASTER OT J024902.25-082917.6 discovery - new dwarf nova outburst with ampl>4.5m

MASTER-IAC auto-detection system discovered OT source at (RA, Dec) = 02h 49m 02.25s -08d 29m 17.6s on 2016-09-07.23032 UT with m_OT=17.5m ,mlim=20.2m.
The OT is seen in 2 images. We have reference image without OT on 2016-08-13.22288 UT with unfiltered magnitude limit 20.2m.
The discovery and reference images are http://master.sai.msu.ru/static/OT/024902.25-082917.6.png

Spectral observations are required for all OT.

MASTER Global Robotic Net