MASTER detection of the outburst with duration less then 39h

ATel #13543; P. Balanutsa, V. Lipunov, V. Kornilov, O. Gress, E. Gorbovskoy, V. Vladimirov, N. Tyurina, A. Kuznetsov, D. Vlasenko, I. Gorbunov, D. Cheryasov, D. Zimnukhov, V. Senik, A. Chasovnikov, D. Kuvshinov, V. Shumkov, T. Pogrosheva, F. Balakin, K. Zhirkov(Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C. Lopez, F. Podesta, C. Francile(Observatorio Astronomico Felix Aguilar OAFA), H. Levato(Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE), R. Rebolo, M. Serra(The Instituto de Astrofisica de Canarias), D. Buckley(South African Astronomical Observatory), N. M. Budnev (Irkutsk State University, API), V. Yurkov, A. Gabovich, Yu. Sergienko(Blagoveschensk Educational State University), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory)
on 5 Mar 2020; 23:00 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Tweet

MASTER OT J054905.59+582507.4 detection - outburst with ampl>2m and duration less then 39h

MASTER-Kislovodsk auto-detection system ( Lipunov et al., "MASTER Global Robotic Net",Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 05h 49m 05.59s +58d 25m 07.4s on 2020-03-04.89435 UT.
The OT unfiltered magnitude is 17.7m (mlim=18.7).
The OT is seen in 2 images in a bright state.
MASTER automatic photometry is the following:
2010-09-20 21:59:43 m_OT~mlim=18.9 MASTER-Kislovodsk
....
2020-03-03 20:56:31 m_OT~mlim=19.1 MASTER-Kislovodsk
2020-03-03 22:25:30 mlim=18.6 (no OT) MASTER-IAC
2020-03-04 01:16:59 mlim=18.0 (no OT) MASTER-Tavrida
2020-03-04 18:15:29 mlim=17.0 (no OT) MASTER-Amur
2020-03-04 21:27:52 m_OT=17.3 MASTER-Kislovodsk
2020-03-04 21:37:54 m_OT=17.3 MASTER-Kislovodsk
2020-03-05 16:53:22 m_OT~mlim=19.0 MASTER-Kislovodsk

There are a lot of images with m_OT~19.0, for example on 2015-10-18.96833 UT with unfiltered mlim=19.8m (and m_OT~19.0).
Spectral observations are required.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/054905.59582507.4.png

MASTER Global Robotic Net