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MASTER-SAAO: 2 optical transients.

ATel #7182; S. Shurpakov, V. Lipunov, E. Gorbovskoy (Lomonosov MSU), D. Buckley (SAAO), S. Antipin, N. Tiurina , P. Balanutsa, V. Kornilov, A. Kuznetsov, V. Shumkov, V. Chazov, V. Vladimirov (Lomonosov Moscow State University, SAI), S. Potter, A. Kniazev, M. Kotze (The South African Astronomical Observatory), O. Gress, K. Ivanov, N. Budnev, S. Yazev, V. Poleshchuk, E. Konstantinov, O. Chuvalaev (Irkutsk State University), A. Tlatov, D. Dormidontov, V. Senik, A. Parkhomenko, (Kislovodsk solar station of the Pulkovo observatory RAS), V. Yurkov, Y. Sergienko, A. Gabovich (Blagoveshchensk Educational University), V. Krushinsky, I. Zalozhnih, A. Popov, A. Bourdanov (Ural Federal University)
on 6 Mar 2015; 16:09 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Request for Observations, Transient, Variables

MASTER OT J064720.96-261456.5 - new CV

MASTER-SAAO auto-detection system ( Lipunov et al., Advances in Astronomy, MASTER Global Robotic Net, 2010 ) discovered OT source at (RA, Dec) = 06h 47m 20.96s -26d 14m 56.5s on 2015-03-04.90017 UT.

The OT unfiltered magnitude is 17.2m (limit 18.9m).

The OT is seen in 6 images. There is no minor planet at this place.

We have reference image without OT on 2015-01-14.05390 UT with marginally 19.1m of OT. There are several flares of this object in Catalina survey's archive.

Spectral observations are required.

The discovery and reference images are available at:http://master.sai.msu.ru/static/OT/064720.96-261456.5_1.png

MASTER OT J151529.62-382313.3 - possible Dwarf Nova

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 15h 15m 29.62s -38d 23m 13.3s on 2015-03-06.01483 UT.

The OT unfiltered magnitude is 17.1m (the limit is 18.3m).

The OT is seen in 3 images. There is no minor planet at this place.

We have reference image without OT on 2015-02-23.07083 UT with 20.7 unfiltered magnitude limit.

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/151529.62-382313.3.png

Spectral observations are required.

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net