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Bright Supernova candidate detected by MASTER

ATel #5051; S. Shurpakov, D. Denisenko, V. Lipunov, E. Gorbovskoy, P. Balanutsa, N. Tiurina, V. Kornilov, A. Belinski, N. Shatskiy, V. Chazov, A. Kuznetsov, V. Yecheistov (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 6 May 2013; 14:57 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

Subjects: Optical, Supernovae, Transient

MASTER OT J143358.97+401420.7 - PSN in UGC 9379

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 14h 33m 58.97s +40d 14m 20.7s on 2013-05-05.92826 UT. The OT unfiltered magnitude is 15.7m (limit 18.3m). The OT is seen in 2 images. There is no minor planet at this place. We have reference image without OT on 2011-01-14.10520 UT with unfiltered magnitude limit 20.2m.

The OT is located 4" east and 20" south of the center of UGC 9379. There is a red star SDSS J143358.88+401417.8 (g=21.85, r=20.41, i=19.41) 3" south of the OT which is not related to the possible SN.

The latest MASTER-Kislovodsk images of UGC 9379 without OT were obtained on 2013-04-05.948 and 05.979 UT (unfiltered magnitude limit 18.9). Animation of Apr. 05 and May 05 images (sums of two 60-sec exposures on both dates) is posted at http://master.sai.msu.ru/static/OT/PSNinUGC9379-anim.gif

Spectral confirmation is required. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/143358.97401420.7.jpg

Global MASTER Robotic Net