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MASTER-Net: 2 optical transients

ATel #7798; V. Lipunov, E. Gorbovskoy(Lomonosov MSU), D. Buckley(SAAO), R. Rebolo, M. Serra-Ricart , N. Lodieu, G. Israelian (The Instituto de Astrofisica de Canarias), V. Kornilov, V. Vladimirov, P. Balanutsa, A. Kuznetsov, N. Tiurina, S. Antipin, V. Chazov, I. Gorbunov, D. Vlasenko (Lomonosov Moscow State University, Sternberg Astronomical Institute), S. Potter, M. Kotze (South African Astronomical Observatory), A. Tlatov, D. Dormidontov, V. Senik (Kislovodsk Solar Station of the Pulkovo Observatory), O. Gress, N. Budnev, K. Ivanov (Applied Physics Institute, Irkutsk State University), V. Krushinski, I. Zalozhnykh (Ural Federal University), V. Shumkov, S. Shurpakov (MASTER-team)
on 14 Jul 2015; 15:52 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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

MASTER OT J011030.95-593639.4 discovery - new dwarf nova outburt (no sources in VIZIER), Ampl>4.2m

MASTER-SAAO auto-detection system ( Lipunov et al., Advances in Astronomy, MASTER Global Robotic Net, 2010 ) discovered OT source at (RA, Dec) = 01h 10m 30.95s -59d 36m 39.4s on 2015-07-13.94845 UT.
The OT unfiltered magnitude is 17.8m (the limit is 19.0m).
This OT is seen in 6 images. There is no minor planet at this place. We have reference image without OT on 2014-12-31.91043 UT with 19.0 unfiltered magnitude limit.
There is no any sources inside 15" in VIZIER database. So we can suggest the dwarf nova outburst with Amplitude > 4.2m .
Spectral observations are required.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/011030.95-593639.4.png

MASTER OT J175256.71+120840.1 - UVCet-type flare

MASTER-IAC auto-detection system discovered OT source at (RA, Dec) = 17h 52m 56.71s , +12d 08m 40s.1 on 2015-07-12.958 UT.
The OT unfiltered magnitude is 17.9m. There is no minor planet at this place. We have image on 2015-12.9677 UT without this OT. There is no any source inside 10" in VIZIER databse. So we can suggest the flare of the UVCet-like star with ampl>4.1m.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/MASTEROTJ175256.71+120840.1.jpg

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net