MASTER-OAFA: bright OT outburst with ampl>7.7m inside BAKSAN neutrino alert error-box

ATel #13203; V. Shumkov, V. Lipunov (Lomonosov MSU), R. Podesta (OAFA), H. Levato (ICATE) E. Gorbovskoy, V. Kornilov, N. Tiurina, P. Balanutsa, T. Pogrosheva, A. Kuznetsov, V. Vladimirov, D. Vlasenko, I. Gorbunov, D. Zimnukhov, V. Senik, F. Balakin, A. Pozdnyakov, A. Chasovnikov, V. Topolev, K. Zhirkov, D. Kuvshinov (Lomonosov MSU), C. Lopez, F. Podesta, C. Francile (OAFA), H. Levato (ICATE), V. Petkov (RAS), D. Buckley (SAAO), R. Rebolo, M. Serra (IAC), O. A. Gres, N. M. Budnev, O. Ershova (ISU, API), A. Tlatov, D. Dormidontov(KSS of Pulkovo Observatory), V. Yurkov, A. Gabovich, Yu. Sergienko(BSPU), X. Wang (Tsinghua University), H. Hongbo (IHEP ChAS)
on 19 Oct 2019; 20:57 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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MASTER OT J055510.22-041053.0 discovery - OT with ampl>7.7m during BAKSAN neutrino alert inspection

2019swo

MASTER-OAFA auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 05h 55m 10.22s -04d 10m 53.0s on 2019-10-17.20843 UT
during BAKSAN neutrino 191016.51 alert inspection (Lipunov et al. GCN #26014; center R.A.,Dec(2000)=06h 08m 48.000s , -08d 24m 00.00s, R=3d).
The OT unfiltered magnitude is 14.3m (mlim=16.7m).
The OT is seen in 4 images (2019-10-17 04:54:50-05:53:12). There is no minor planet at this place.
We have reference image without OT on 2017-04-23.98832 UT with unfiltered magnitude limit 18.7m.
There is no objects inside 5" in USNO-B1 (22m POSS limit in history), that means current outburst amplitude more then 7.7 (MASTER unfiltered W=0.2B2+0.8R2 by thousands field stars for calibration).
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/055510.22-041053.0.png

This work is supported by RFBR 17-52-80133 and NSFC 11761141001.

MASTER Global Robotic Net