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MASTER-SAAO: PSN in faint unknown galaxy or CV

ATel #11262; P. Balanutsa, V. Lipunov (Lomonosov MSU), D. Buckley (SAAO), E. Gorbovskoy, V. Kornilov, N. Tiurina, O. Gress, V. Shumkov, T. Pogrosheva, K. Vetrov, A. Kuznetsov, V. Vladimirov, D. Zimnukhov, D. Kuvshinov (Lomonosov MSU)
on 6 Feb 2018; 00:50 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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

MASTER OT J065015.19+270823.8 discovery - PSN in faint galaxy or CV

MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 06h 50m 15.19s +27d 08m 23.8s on 2018-02-04.85900 UT.

The OT unfiltered magnitude is 17.0m (mlim=19.0).
The OT is seen in 8 images (2018-02-04 20:36:58.954-22:48:31.554UT). There is no minor planet at this place.
We have reference image on 2016-12-29.95306 UT with unfiltered mlim= 19.9m, the nearest in time is on 2017-12-25 04:46:34UT with mlim=19.5 (MASTER-OAFA).
There is faint (preliminary spiral) galaxy in POSS images, but there is no known galaxy at this position in NED
The second scenario is CV. There wasn't outburst in MASTER Global Robotic Net database since 2009.
Spectral observations are required.

The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/065015.19270823.8.png

MASTER Global Robotic Net