Possible Supernova discovered by MASTER

ATel #4900; S. Shurpakov, D. Denisenko, V. Lipunov, E. Gorbovskoy, P. Balanutsa, N. Tiurina, V. Kornilov, A. Belinski, N. Shatskiy, V. Chazov, A. Kuznetsov, V. Yecheistov, D. Zimnukhov (Moscow State University, SAI), V. Krushinsky, I. Zalozhnih, A. Popov, A. Bourdanov, A. Punanova (Ural Federal University), K. Ivanov, S. Yazev, N. Budnev, E. Konstantinov, O. Chuvalaev, V. Poleshchuk, O. Gress, A. Frolova, (Irkutsk State University), A. Parkhomenko, A. Tlatov, D. Dormidontov, V. Senik (Kislovodsk solar station of the Pulkovo observatory RAS), V. Yurkov, Y. Sergienko, D. Varda, E. Sinyakov (Blagoveshchensk Educational University), P. Podvorotny, V. Shumkov (MASTER team members), H. Levato, C. Saffe (ICATE), C. Mallamaci, C. Lopez and F. Podest (OAFA)
on 20 Mar 2013; 18:05 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

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MASTER OT J185011.29+302059.5 - PSN in PGC 2813322

MASTER-Amur auto-detection system discovered OT source at (RA, Dec) = 18h 50m 11.29s +30d 20m 59.5s on 2013-03-19.77620 UT. The OT unfiltered magnitude is 16.9m (limit 18.2m). The OT is seen in 2 images. There is no minor planet at this place. We have reference image without OT on 2013-02-24.85995 UT with unfiltered magnitude limit 18.0m.

The object is located 11.9" W and 15.1" S of the nucleus of PGC 2813322 galaxy. There is nothing at this position in any catalogs. This area of sky is not covered by SDSS. Color-combined (BRIR) DSS finder chart is uploaded to http://master.sai.msu.ru/static/OT/J185011+302059-BRIR5x5.jpg (5'x5' FOV).

Spectral observations are required. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/185011.29302059.5.png

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