MASTER-SAAO: optical transients

ATel #8764; O. Gress, V. Lipunov (Lomonosov MSU), D. Buckley(SAAO), E. Gorbovskoy, P. Balanutsa, N. Tiurina, V. Kornilov, A. Kuznetsov, D. Vlasenko, I. Gorbunov, D. Kuvshinov, V. Vladimirov (Lomonosov Moscow State University, SAI), S. Potter, A. Kniazev (South African Astonomical Observatory)
on 2 Mar 2016; 20:54 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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MASTER OT J094851.15-110055.0 discovery - possible dwarf nova outburst, ampl>5.2m

MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 349171 ) discovered OT source at (RA, Dec) = 09h 48m 51.15s -11d 00m 55.0s on 2016-03-01.97924 UT.
The OT unfiltered magnitude is 16.8m (the limit is 19.6m).
The OT is seen in 3 images. There is no minor planet at this place.There is no any known sources at this place in VIZIER database(it means the 22m upper limit and ampl>5.2m)
We have reference image without OT on 2015-10-13.12160 UT with unfiltered magnitude limit 18.8m.
We reobserved it on 2016-03-02 18:57:03.53, m_OT=17.0
Spectral observations are required.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/094851.15-110055.0.png

MASTER OT J133338.76-514451.4 discovery - possible dwarf nova outburst with ampl>4.2m

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 13h 33m 38.76s -51d 44m 51.4s on 2016-03-02.02319 UT.
The OT unfiltered magnitude is 17.8m (19.4m limit).
There are 4 images with OT. There is no minor planet at this place.There is no any known sources in VIZIER database inside 5" (it means amplitude>4.2m).
We have reference image without OT on 2015-04-12.96228 UT with unfiltered magnitude limit 19.6m. MASTER-SAAO reobserved it on 2016-03-02 20:01:41.163UT , m_OT=17.8
Spectral observations are required.
The discovery and reference images are available at http://master.sai.msu.ru/static/OT/133338.76-514451.4.png

MASTER OT J062655.88-231831.1 discovery - possible dwarf nova outburst, ampl>3.2m

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 06h 26m 55.88s -23d 18m 31.1s on 2016-03-01.76481 UT.
The OT unfiltered magnitude is 18.8m (limit 20.5m).
The OT is seen in 8 images. There is no minor planet at this place. There is no any known sources in VIZIER database, so the amplitude of outburst is more then 3.2m
We have reference image without OT on 2015-05-11.71795 UT with unfiltered magnitude limit 19.7m.
Spectral observations are required.
The discovery and reference images are available at http://observ.pereplet.ru/images/MASTEROTJ062655.88-231831.jpg

MASTER Global Robotic Net