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MASTER: bright QSO flare and OT

ATel #7301; P. Balanutsa, V. Lipunov, E. Gorbovskoy (Lomonosov MSU), D. Buckley (SAAO), S. Antipin, N. Tiurina, V. Kornilov, A. Kuznetsov, V. Chazov, V. Vladimirov, E. Popova (Lomonosov Moscow State University, Sternberg Astronomical Institute), 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), V. Shumkov, S. Shurpakov (MASTER-team)
on 27 Mar 2015; 14:41 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Cataclysmic Variable, Quasar, Transient, Variables

MASTER OT J102834.06-023659.7 discovery - bright flare of 1WGA J1028.5-0236 QSO

MASTER-Kislovodsk auto-detection system ( Lipunov et al., Advances in Astronomy, MASTER Global Robotic Net, 2010 ) discovered OT source at (RA, Dec) = 10h 28m 34.06s -02d 36m 59.7s on 2015-03-26.78446 UT.

The OT unfiltered magnitude is 16.8m (the limit is 18.8m) and OT is seen at 3 images.

This MASTER OT is identical to 1WGA J1028.5-0236 quasar with V=19.05, B-V=0.73 and redshift z=0.476.

There are the following MASTER OT flares in MASTER-Kislovodsk archive database :

UT, MASTER-Kislovodsk/Tunka observatory, QSO unfiltered m

2010-11-07 02:22:59.437 Kis 17.4
2011-03-22 15:22:29.9 Tun 17.12
2013-12-29 22:29:54.909 Kis 18.6
2014-03-24 18:42:24.101 Kis 18.9
2015-02-22 18:51:31.325 Kis 17.8
2015-03-26 18:38:02.723 Kis 16.8

We have reference image with quite QSO state on 2012-03-18.86014 UT with unfiltered m_QSO=19.6 .

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/102834.06-023659.7.png

Spectral observations are required.

MASTER OT J104546.24-022908.4 discovery - new variable of UV Ceti type

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 10h 45m 46.24s -02d 29m 08.4s on 2015-03-26.77910 UT.

The OT unfiltered magnitude is 16.7m (the limit is 18.9m).

The OT is seen in 3 images. We have reference image without OT on 2012-03-18.85237 UT with 20.4 unfiltered magnitude limit.

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/104546.24-022908.4.png

Spectral observations are required.

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net