Аннотация: MASTER OT J050002.2+740407.4 discovery - bright possible dwarf nova outburst, Ampl>5.1
MASTER-Amur auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 349171 ) discovered OT source at (RA, Dec) = 05h 00m 02.2s +74d 04m 07.4s on 2016-07-06 16:47:02.264UT with unfiltered(0.2B2+0.8R2 calibrated to USNO B1) m_OT=16.9
The OT is seen on 6 images.There is no minor planet at this place.
We have reference images without OT on 2016-05-26 16:24:03 with m_lim=18.5 (MASTER-Amur), 2016-04-29 18:24:32 with m_lim=19.7 (MASTER-Tunka)
Spectral observations are required. The discovery and refernce images http://observ.pereplet.ru/images/MASTEROTJ050002.2+740407.4.jpg