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MASTER: 5.2mag amplitude OT

ATel #8819; V. Shumkov, V. Lipunov (Lomonosov MSU), D. Buckley, S. Potter, A. Kniazev (South African Astonomical Observatory), E. Gorbovskoy, N. Tiurina, P. Balanutsa, V. Kornilov, A. Kuznetsov, V. Vladimirov, O. Gress, D. Vlasenko, I. Gorbunov, D. Kuvshinov, V. Shumkov (Lomonosov Moscow State University, SAI)
on 15 Mar 2016; 10:38 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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

MASTER OT J203533.66-260924.0 discovery - possible dwarf nova outburst, Ampl>5.2mag

MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 349171 ) discovered OT source at (RA, Dec) = 20h 35m 33.66s -26d 09m 24.0s on 2016-03-12.11795 UT.
The OT unfiltered magnitude is 16.8m (the limit is 19.0m).
The OT is seen in 3 images. There is no minor planet at this place.
We have reference image without OT on 2015-07-12.82984 UT with unfiltered magnitude limit 20.3m.
There is no known sources in VIZIER database (it means 22mag POSS limit, etc), but you can see very faint marginally seen non-catalogued source in blue POSS images, so we suggest the dwarf nova outburst with >5.2mag amplitude.
Spectral observations are required.
The discovery and reference images are available at http://master.sai.msu.ru/static/OT/203533.66-260924.0.png

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net