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MASTER-SAAO: 2 dwarf nova outbursts

ATel #8840; V. Shumkov, O. Gress, 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, D. Vlasenko, I. Gorbunov, E. Popova, D. Kuvshinov (Lomonosov Moscow State University, SAI)
on 18 Mar 2016; 16:58 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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

MASTER OT J122739.45-402219.8 discovery - dwarf nova outburst, ampl>4.7

MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 349171 ) discovered OT source at (RA, Dec) = 12h 27m 39.45s -40d 22m 19.8s on 2016-03-16.91904 UT.
The OT unfiltered magnitude is 17.3m (limit 19.8m).
The OT is seen in 3 images. There is no minor planet at this place. We have reference image without OT on 2015-05-18.84797 UT with unfiltered magnitude limit 20.3m.
There is no known sources in VIZIER database, it means the amplitude of outburst in more then 4.7mag (POSS 22m limit).
Spectral observations are required.
The discovery and reference images are available at http://master.sai.msu.ru/static/OT/122739.45-402219.8.png

MASTER OT J151001.95-321756.6 discovery - dwarf nova outburst,Ampl>3.4m

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 15h 10m 01.95s -32d 17m 56.6s on 2016-03-18.03723 UT.
The OT unfiltered magnitude is 17.4m (limit 21.0m).
The OT is seen in 4 images. There is no minor planet at this place.
We have reference image without OT on 2015-02-23.06807 UT with unfiltered magnitude limit 20.8m.So we suggest more then 3.4m outburst's amplitude
Spectral observations are required.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/151001.95-321756.6.png

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net