MASTER: new high amplitude OT outburst (>6m)
ATel #13809; T. Pogrosheva, V. Lipunov, E. Gorbovskoy, V. Kornilov, I. Gorbunov, N. Tiurina, O. Gress, P. Balanutsa, A. Kuznetsov, F. Balakin, V. Vladimirov, K. Zhirkov, D. Zimnukhov, A. Chasovnikov, V. Senik, E. Minkina, D. Kuvshinov, D. Vlasenko, D. Cheryasov (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, F. Podesta, C. Francile (OAFA), H. Levato (ICATE), R. Rebolo, M. Serra (IAC), D. Buckley (SAAO), N. Budnev (ISU, API), A. Tlatov (KSS of the Pulkovo Observatory), A. Gabovich, Yu. Sergienko, V. Yurkov(BSPU), V. Shumkov
on 16 Jun 2020; 09:13 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)
Subjects: Optical, Request for Observations, AGN, Cataclysmic Variable, Quasar, Transient, Variables
MASTER OT J131155.99-482815.1 discovery - outburst amplitude >6.1m
MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 13h 11m 55.99s -48d 28m 15.1s on 2020-06-15.84429 UT.
The OT unfiltered magnitude is 17.7m (mlim=20.2).
The OT is seen in 3 images. There is no minor planet at this place.
There are also 2 images at MASTER-OAFA: at 2020-06-07 05:02:48UT with m_OT=15.9, and at 2020-06-10 01:03:53UT with m_OT=16.9
We have reference images on 2017-04-22.82880 UT with unfiltered mlim=20.3m, nearest in time: 2020-05-24 21:48:00UT with mlim=19.7, 2020-05-26 02:09:59UT with mlim=19.5.
There is no any sources in VIZIER database, it gives 22m POSS limit and more then 6.1m of current outburst amplitude.
Deep photometry and spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/131155.99-482815.1.png
MASTER Global Robotic Net
