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MASTER: very bright possible QSO flare

ATel #8335; P. Balanutsa, V. Lipunov, E. Gorbovskoy (Lomonosov MSU), D. Buckley (SAAO), N. Tiurina, V. Kornilov, A. Kuznetsov, O. Gress, V. Shumkov, I. Gorbunov, D. Vlasenko, E. Popova, V. Vladimirov (M. V. Lomonosov Moscow State University, SAI), S. Potter, M. Kotze, A. Kniazev (South African Astronomical Observatory)
on 25 Nov 2015; 08:52 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Request for Observations, AGN, Quasar, Transient, Variables

MASTER OT J083717.54-573411.1 discovery - possible QSO flare (12.2mag)

MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 349171 ) discovered OT source at (RA, Dec) = 08h 37m 17.54s -57d 34m 11.1s on 2015-11-24.03137 UT.

The OT unfiltered magnitude is 12.2m (limit 19.1m).

The OT is seen in 6 images. There is no minor planet at this place.
MASTER-SAAO preliminary photometry is the following:
2014-12-23 01:23:32.342   13.8
2015-02-02 18:32:13.365   14.5
2015-03-14 20:56:21.767   14.7
2015-10-28 22:52:45.683   12.2
2015-11-24 00:45:10.796   12.2

There is QSO IRAS source in 4.5" . (This bright source doesn't present in publishied ASAS photometry data during 10 years (as its neighbouring bright star), so it means, that this is not Omicron Cet-type source.)
Spectral observations are required.
The discovery and reference images are available at http://master.sai.msu.ru/static/OT/083717.54-573411.1.png

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net