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MASTER: possible SuperNova in PGC604988

ATel #7332; S. Shurpakov, V. Lipunov, E. Gorbovskoy (Lomonosov MSU), D. Buckley (SAAO), S. Antipin, N. Tiurina, P. Balanutsa, V. Kornilov, A. Kuznetsov, V. Chazov, V. Vladimirov, E. Popova, V. Shumkov (Lomonosov Moscow State University, SAI), S. Potter, A. Kniazev, M. Kotze (The South African Astronomical Observatory), O. Gress, K. Ivanov, N. Budnev, S. Yazev, V. Poleshchuk, E. Konstantinov, O. Chuvalaev (Irkutsk State University), A. Tlatov, D. Dormidontov, V. Senik, A. Parkhomenko, (Kislovodsk solar station of the Pulkovo observatory RAS), V. Yurkov, Y. Sergienko, A. Gabovich (Blagoveshchensk Educational University), V. Krushinsky, I. Zalozhnih, A. Popov, A. Bourdanov (Ural Federal University)
on 1 Apr 2015; 09:07 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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

MASTER OT J054012.24-384842.1 discovery - possible SuperNova in PGC604988 (153Mpc)

MASTER-SAAO auto-detection system ( Lipunov et al., Advances in Astronomy, MASTER Global Robotic Net, 2010 ) discovered OT source at (RA, Dec) = 05h 40m 12.24s -38d 48m 42.1s on 2015-03-31.85926 UT.

The OT unfiltered magnitude is 17.8m (limit is 18.5m). There are 3 images with this possible Super Nova.
We have reference images without OT on 2014-12-25.93635 UT with 20.1m unfiltered magnitude limit, and on 2015-02-19.844UT with m_lim=20.0.

This possible Super Nova is in 22.8"W and 13.3"S from the center of PGC604988 galaxy (Vhel=10784, Imag=13.8)

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/054012.24-384842.1.png

Spectral observations are required.

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net