MASTER discovery of bright OT with amplitude more then 8m
ATel #14041; T. Pogrosheva, V. Lipunov (Lomonosov MSU), R. Podesta (OAFA), D. Buckley (SAAO), E. Gorbovskoy, V. Kornilov, O. Gress, N. Tiurina, V. Vladimirov, K. Zhirkov, A. Gabovich, A. Kuznetsov, F. Balakin, A. Chasovnikov, A. Pozdnyakov, V. Shumkov, E. Minkina, I. Gorbunov, D. Zimnukhov, V. Senik, D. Kuvshinov, T. Pogrosheva, D. Vlasenko, D. Cheryasov (Lomonosov Moscow State University, SAI, Physics Department), D. Buckley (SAAO), F. Podesta, C. Francile (OAFA), R. Rebolo, M. Serra (IAC), N. Budnev (ISU, API), A. Tlatov (KSS of the Pulkovo Observatory), Yu. Sergienko, V. Yurkov(BSPU)
on 26 Sep 2020; 13:10 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)
Subjects: Optical, Request for Observations, Cataclysmic Variable, Supernovae, Transient, Variables
Referred to by ATel #: 14042
MASTER OT J213908.79+161240.2 discovery - new OT, ampl>8.8m
AT2020ugj
MASTER-OAFA auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 21h 39m 08.79s +16d 12m 40.2s on 2020-09-26.03850 UT.
The OT magnitude (unfiltered, automatic photometry) are
2020-09-26 00:55:26 16.1
2020-09-26 01:08:42 15.6
2020-09-26 01:46:46 15.5
2020-09-26 01:52:55 15.5
The nearest in time image without OT was in MASTER-Tavrida with mlim=18.1 at 2020-09-24 21:31:59UT
There is no minor planet at this place.
We have reference image on 2017-09-26.19731 UT with unfiltered mlim= 18.7m.
There is no any sources in VIZIER database, it gives rlim=24.3 for our source in history (by nearest SDSS faint stars) and amplitude more then 8.8m.
Spectral observations are required.
The discovery image is available at http://master.sai.msu.ru/static/OT/213908.79161240.2.png
MASTER Global Robotic Net
