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MASTER: possible Nova in M31 and CV

ATel #10506; V. Shumkov, V. Lipunov (Lomonosov MSU), R. Rebolo, M. Serra-Ricart (IAC), R. Podesta (OAFA), H. Levato (ICATE), E. Gorbovskoy, N. Tiurina, V. Kornilov, P. Balanutsa, A. Kuznetsov, O. Gress, T. Pogrosheva, V. Vladimirov, I. Gorbunov, A. Krylov (Lomonosov MSU), A. Gabovich(BSPU), C. Saffe(ICATE), F. Podesta, C. Francile (OAFA), D. Kuvshinov (Phys. Dep. MSU)
on 19 Jun 2017; 11:02 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Request for Observations, Cataclysmic Variable, Nova, Transient, Variables

MASTER004617.94+415626.1 discovery - possible Nova in M31
MASTER-IAC auto-detection system discovered OT source at (RA, Dec) = 00h 46m 17.94s +41d 56m 26.1s on 2017-06-19.19669 UT.
The OT unfiltered magnitude is 19.4 on 2017-06-18 04:40:55.321UT(limit 19.8m), m_OT=18.4 on 2017-06-19 04:39:15.299UT .
The OT is seen in 7 images. There is no minor planet at this place.
We have reference image without OT on 2016-06-17.18755 UT with unfiltered magnitude limit 21.0m.
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/004617.94415626.1.png

MASTER OT J134847.94-420705.2 discovery - CV, Ampl>5.2m

MASTER-OAFA auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L ) discovered OT source at (RA, Dec) = 13h 48m 47.94s -42d 07m 05.2s on 2017-06-18.01884 UT.
The OT unfiltered magnitude is 17.1m (mlim=19.2m).
The OT is seen in 3 images. There is no minor planet at this place.
We have reference image without OT on 2017-04-09.03564 UT with 19.0 unfiltered magnitude limit.
There is only GSC2.3 star with blue jmag=22.31, it means more then 5.2m of current outburst amplitude
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/MASTEROTJ134847.94-420705.2.jpg

MASTER004357.21+411135.2 detection - long variable star in M31
MASTER-IAC auto-detection system discovered OT source at (RA, Dec) = 00h 43m 57.21s +41d 11m 35.2s on 2017-06-06.18983 UT.
The OT unfiltered magnitude is 18.6m (limit 19.5m).
The OT is seen in 506 images.
The detection and reference images are available at:
http://master.sai.msu.ru/static/OT/004357.21411135.2.png

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net