MASTER: bright dwarf nova outburst
ATel #7970; O. Gress, V. Lipunov, E. Gorbovskoy (Lomonosov MSU), D. Buckley (SAAO), V. Kornilov, N. Tiurina, P. Balanutsa, I. Gorbunov, A. Kuznetsov, V. Vladimirov, D. Vlasenko (M. V.Lomonosov Moscow State University, Sternberg Astronomical Institute), 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 30 Aug 2015; 23:00 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)
Subjects: Optical, Cataclysmic Variable, Transient, Variables
MASTER OT J140753.53-161824.6 - possible dwarf nova outburst (15.7m), ampl>3.5m
MASTER-SAAO auto-detection system ( Lipunov et al., Advances in Astronomy, MASTER Global Robotic Net, 2010 ) discovered OT source at (RA, Dec) = 14h 07m 53.53s -16d 18m 24.6s on 2015-08-29.75772 UT.
The OT unfiltered magnitude is 15.7m (the limit is 17.5m).
There are 8 images with OT in outburst state. We have reference image with m_OT=19.2 on 2015-01-24.027UT with 20.2 unfiltered magnitude limit.
There is USNO star with B=20.01, R=18.6-`8.91, I=18.62. So we can suggest dwarf nova outburst with amplitude more then 3.5m.
Spectral observations are required.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/140753.53-161824.6.png
List of Optical Transients discovered by MASTER
MASTER Global Robotic Net
