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Two bright OT detected by MASTER-SAAO

ATel #6884; O. Gress (Irkutsk), V. Vladimiov(SAI), D. Buckley (SAAO, South African Astronomical Observatory), V. Lipunov, E. Gorbovskoy, V. Kornilov, N. Tiurina, P. Balanutsa, A. Kuznetsov, D. Denisenko (Moscow State University, SAI), S. Potter, A. Kniazev, M. Kotze (SAAO), K. Ivanov, S. Yazev, N. Budnev, V. Poleshchuk, E. Konstantinov (Irkutsk State University) A. Parkhomenko, A. Tlatov, D. Dormidontov, V. Senik (Kislovodsk solar station of the Pulkovo observatory RAS) V. Yurkov, Y. Sergienko, D. Varda, E. Sinyakov, V. Gabovich (Blagoveshchensk Educational University), V. Krushinsky, I. Zalozhnih, A. Popov, A. Bourdanov (Ural Federal University) S. Shurpakov (MASTER team members)
on 7 Jan 2015; 20:51 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

Subjects: Optical, Cataclysmic Variable, Transient, Variables

MASTER OT J150302.53-674306.4

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 15h 03m 02.53s -67d 43m 06.4s on 2015-01-07.05532 UT. The OT unfiltered magnitude is 14.8m (limit 17.5m).

The are 27 images with OT. There is no minor planet at this place. Nothing is present at this position in AAVSO VSX.

We have reference image without OT on 2015-01-01.04162 UT with unfiltered magnitude limit 18.1m.

Follow up observations are required. The discovery and reference images and preliminary light curve are available at http://master.sai.msu.ru/static/OT/MASTERJ150302.53-674306.4.png

MASTER OT J151146.85-285415.3

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 15h 11m 46.85s -28d 54m 15.3s on 2015-01-07.10453 UT. The OT unfiltered magnitude is 16.2m (limit 18.0m). There are 3 images with OT. There is no minor planet at this place.

We have reference image without OT on 2015-01-03.10147 UT with unfiltered magnitude limit 18.7m.

This OT can be identified with AllWISE star J151146.80-285419.3 with high proper motion (the diference is 4.1 arcsec). Nothing is present at this position in AAVSO VSX.

Follow up observations are required. The discovery and reference images are available at http://master.sai.msu.ru/static/OT/MASTERJ151146.85-285415.3.png

List of Optical Transients discovered by MASTER

Global MASTER Net