Аннотация: MASTER 175525.02-453916.8 discovery - new Dwarf Nova outburst with Ampl>6.5m
MASTER-SAAO auto-detection system ( Lipunov et al., Advances in Astronomy, MASTER Global Robotic Net, 2010 ) discovered OT source at (RA, Dec) = 17h 55m 25.02s -45d 39m 16.8s on 2015-05-13.888 UT. The OT unfiltered magnitude is 14.1m (the limit is 17.9m).
There are 3 images wuth OT. There is no minor planet at this place.
We have reference image without OT on 2015-02-03.11519 UT with 18.2 unfiltered magnitude limit.
MASTER OT isn't 0443-0655752 or 0443-0655775 USNO-B1 stars, it's between them, so the outburst came from the previousely unvisible star, and the Ampl. in this case is >6.5m
Spectral observations are required.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/175525.02-453916.8.png