MASTER-IAC: possible superluminous SN

ATel #8009; O. Gress, V. Lipunov, E. Gorbovskoy (Lomonosov MSU), R. Rebolo, M. Serra-Ricart, N. Lodieu, G. Israelian (The Instituto de Astrofisica de Canarias), V. Kornilov, N. Tiurina, A. Kuznetsov, I. Gorbunov, V. Chazov, D. Vlasenko (Lomonosov Moscow State University, Sternberg Astronomical Institute), D. Buckley, S. Potter, M. Kotze (South African Astronomical Observatory), N. M. Budnev, K. Ivanov (Applied Physics Institute, Irkutsk State University), A. Tlatov, D. Dormidontov, V. Senik (Kislovodsk Solar Station of the Pulkovo Observatory), V. Krushinski, I. Zalozhnykh (Ural Federal University), Yu. Sergienko, A. Gabovich, V. Yurkov (Blagoveschensk Educational State University)
on 7 Sep 2015; 09:12 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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MASTER OT J221829.51-024708.5 - possible superluminous supernova in Sloan galaxy

MASTER-IAC auto-detection system ( Lipunov et al., Advances in Astronomy, MASTER Global Robotic Net, 2010 ) discovered OT source at (RA, Dec) = 22h 18m 29.51s -02d 47m 08.5s on 2015-09-05.9849 UT. The OT unfiltered magnitude is 18.2m (limit 19.9m). There are 3 images with OT (2015-09-05.9849, 05.992, 05.0000694UT) with m_OT=18.2. There is 3 images in MASTER-SAAO database on 2015-09-01.916, 01.932UT, with unfiltered limit 18.9m with marginally seen PSN. There is no minor planet at this place.

We have reference image without OT on 2011-11-19.7066 UT with unfiltered magnitude limit 19.9m.

There is only SDSS J221829.48-024708.9 galaxy (inside 5" in VIZIER database) in 0.5" with Green 22.3m, Red 21.9m, UV 23.4m

The discovery and reference images are available at http://master.sai.msu.ru/static/OT/MASTEROTJ221829.51-024708.5.jpg

MASTER Global Robotic Net