MASTER-Tavrida: possible Nova in M31

ATel #10268; E. Popova, V. Lipunov, E. Gorbovskoy, N. Tiurina, A. Kuznetsov, P. Balanutsa, V. Kornilov, V. Chazov, A. Barabanov, A. Makarov, O. Gress, T. Pogrosheva, V. Shumkov, I. Gorbunov, A. Krylov, D. Vlasenko, V. Vladimirov, D. Kuvshinov (Lomonosov Moscow State University, SAI)
on 14 Apr 2017; 15:00 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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MASTER OT J004056.15+405819.1 detection - possible Nova in M31

MASTER-Tavrida auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L ) discovered OT source at (RA, Dec) = 00h 40m 56s.15 , +40d 58m 19s.1(+-1") on 2017-04-13 01:17:02.572UT.
The OT unfiltered magnitude is 17.6m (mlim=18.0).
The OT is seen in 6 images on 13th of April , and on 6 images on 2017-04-14 01:09:23-01:24:29UT.
There is no minor planet at this place.
There is XMM-OM source with 4" offset.
We have reference images on 2017-02-06 15:33:18UT with mlim=19.0 (MASTER-Kislovodsk), on 2017-03-31 18:00:33UT with mlim=18.5(MASTER-Tavrida)
The discovery and reference images are available at : http://master.sai.msu.ru/static/OT/MASTEROTJ004056.15+405819.1.jpg

MASTER Global Robotic Net