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BZQJ2331-2148 optical flare detected by MASTER during Fermi 502272781 inspection

ATel #9830; T. Pogrosheva, V. Lipunov (Lomonosov MSU), D. Buckley (SAAO), E. Gorbovskoy, N. Tiurina, P. Balanutsa, A. Kuznetsov, V. Kornilov, V. Vladimirov, O. Gress, V. Shumkov (Lomonosov Moscow State University, SAI)
on 6 Dec 2016; 15:02 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Radio, Optical, Gamma Ray, Request for Observations, AGN, Blazar, Transient

Referred to by ATel #: 9832

MASTER OT J233104.07-214815.6 discovery - BZQJ2331-2148 blazar's optical flare, detected during Fermi 502272781 trigger inspection (Lipunov et al., GCN #20237)

MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L ) discovered OT source at (RA, Dec) = 23h 31m 04.07s -21d 48m 15.6s on 2016-12-01.78880 UT.
The OT unfiltered magnitude is 17.7m (mlim=19.5).
The OT is seen in 3 images made during Fermi 502272781 trigger inspection by MASTER.
We have reference images on 2016-10-18 21:24:18UT (mlim=19.2), on 2015-09-13.88900 UT with unfiltered mlim= 19.7m in MASTER-SAAO, and on 2016-11-18 22:12:38UT in MASTER-IAC with marginally seen OT (USNO B1 source with B2=20.18, R2=20.29, BZQJ2331-2148 blazar, source from Swift catalog (D'Elia+, 2013), radio source, etc.).
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/233104.07-214815.6.png

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net