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MASTER-IAC: high amplitude (>8m) bright OT

ATel #9499; V. Lipunov (Lomonosov MSU), R. Rebolo Lopez, M. Serra Ricart (IAC), N. Tiurina, E. Gorbovskoy, P. Balanutsa, A. Kuznetsov, V. Kornilov, O. Gress, K. Ivanov, V. Shumkov, P. Balanutsa, T. Pogrosheva, J. Rabinovich, D. Vlasenko, S. Shurpakov, D. Kuvshinov (Lomonosov MSU, SAI)
on 16 Sep 2016; 17:57 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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

Referred to by ATel #: 9558

MASTER OT J035109.53+152856.9 discovery - high amplitude bright optical transient outburst

MASTER-IAC auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L ) discovered OT source at (RA, Dec) = 03h 51m 09.53s +15d 28m 56.9s on 2016-09-16.23091 UT.
The OT unfiltered magnitude is 16.3m (mlim=18.6m).
The OT is seen in 2 images. There is no minor planet at this place.
There are 2 images with OT in MASTER-Argentina at 2016-09-16 08:26:54UT
We have reference image without OT on 2016-09-14 04:06:03UT, 2015-12-14.12236 UT with unfiltered magnitude limit 20.7m in MASTER-IAC.
There is no any object in VIZIER inside 15" (22m POSS limit)
There is no any object at SDSS images. There is neibouring Sloan galaxy (ra=57.77482,dec=15.45611) with umag=25.22,gmag=25.26,rmag=24.18. that gives the upper limit for our OT and more then 8mag amplitude of its current outburst.

Spectral observations are required.
The discovery and reference images are available at http://master.sai.msu.ru/static/OT/035109.53152856.9.png

MASTER Global Robotic Net