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MASTER-SAAO: OTs detection

ATel #10548; O. Gress, V. Lipunov (Lomonosov MSU), D. Buckley (SAAO), E. Gorbovskoy, P. Balanutsa, N. Tiurina, A. Kuznetsov, V. Kornilov, T. Pogrosheva, V. Shumkov, V. Vladimirov, D. Vlasenko, D. Kuvshinov (Lomonosov Moscow State University, SAI), A. Gabovich (BSPU)
on 1 Jul 2017; 10:33 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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

MASTER OT J180409.47-761337.3 discovery - dwarf nova? outburst, ampl>3.6m

MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L ) discovered OT source at (RA, Dec) = 18h 04m 09.47s -76d 13m 37.3s on 2017-06-30.81575 UT.
The OT unfiltered magnitude is 16.9m (mlim=19.0). The OT is seen in 3 images. There is no minor planet at this place.
We have reference image on 2015-11-06.82870 UT with unfiltered mlim= 20.4m.
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/180409.47-761337.3.png

MASTER OT J035348.19-704040.5 discovery - blue OT (dwarf nova?), ampl>5.5

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 03h 53m 48.19s -70d 40m 40.5s on 2017-06-24.12387 UT.
The OT unfiltered magnitude is 17.5m (mlim=19.8).
The OT is seen in 2 images. There is no minor planet at this place.
We have reference image on 2015-10-19.86316 UT with unfiltered mlim=20.0m, on 2016-11-07 20:33:24 with mlim=19.5.
There is only GSC 2.3 known star with blue jmag=21.89 in 1975.943, it means 22m POSS limit and more then 5.5 value of current outburst amplitude
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/035348.19-704040.5_1.png

MASTER Global Robotic Net