MASTER optical follow up B2 1420+32

ATel #12887; V. Lipunov (Lomonosov MSU), R. Rebolo, M. Serra (IAC), R. Podesta, C. Lopez, C. Francile, F. Podesta (OAFA, SJNU), H. Levato (ICATE, SJNU), D. Buckley (SAAO), N. Tiurina, E. Gorbovskoy, A. Kuznetsov, O. Gress, I. Gorbunov, P. Balanutsa, V. Kornilov, V. Vladimirov, D. Zimnukhov, F. Balakin, V. Senik, V. Grinshpun, A. Filetkin, A. Pozdyakov, K. Zhirkov, D. Kuvshinov (Lomonosov MSU), V. Yurkov, A. Gabovich, Yu. Sergienko, (BSPU), O. Gress, N. M. Budnev, O. Ershova (API ISU), T. Pogrosheva, V. Shumkov, A. Tlatov, D. Dormidontov, A. V. Parhomenko (KSS of the Pulkovo Observatory)
on 25 Jun 2019; 20:48 UT
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Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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MASTER OT J142230.43+322310.5 (Chasovnikov et al. ATEL #12201) - blazar B2 1420+32 optical flare with unfiltered m_bla=14.6

MASTER-Kislovodsk ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
reobserved blazar B2 1420+32, following up Marchini et al. ATEL #12886 detection of optical flare

The OT has unfiltered (W=0.2B+0.R by USNO-B1.0 B2,R2) m_OT=14.6 on 2019-06-25 20:04:07UT (mlim=20.0)

There are several previous flares and automatic photometry in MASTER database:
2018-11-09 02:20:40.993UT 17.1 MASTER-Kislovodsk
2018-10-31 15:13:32.484UT 15.9 MASTER-Kislovodsk
2018-10-11 16:00:30.638UT 17.5 MASTER-Kislovodsk
2018-02-06 20:32:14.364UT 17.8 MASTER-Kislovodsk
2018-01-03 04:23:05.675UT 15.6 MASTER-Tavrida
2016-03-01 04:48:55.769UT 18.1 MASTER-IAC

MASTER Global Robotic Net