MASTER: OT outburst detection inside LVC S190923y error-box
ATel #13140; E. Gorbovskoy, V. Lipunov, V. Kornilov, N. Tiurina, P. Balanutsa, A. Kuznetsov, V. Vladimirov, D. Vlasenko, I. Gorbunov, D. Zimnukhov, V. Senik, T. Pogrosheva, K. Pozdnyakov, A. Chasovnikov, V. Topolev, F. Balakin, D. Kuvshinov (Lomonosov MSU), R. Podesta, C. Lopez, F. Podesta, C. Francile (OAFA), H. Levato (ICATE), R. Rebolo, M. Serra (IAC), D. Buckley (SAAO), 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)
on 27 Sep 2019; 22:34 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)
Subjects: Optical, Request for Observations, Cataclysmic Variable, Gravitational Waves, Transient, Variables
MASTER OT J162250.41-482250.3 discovery - outburst with amplitude >5m
During LIGO/Virgo S190923y (LVC GCN #25814)
inspection by MASTER Global Robotic Net (GCN #25812, GCN #25855)
MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 16h 22m 50.41s -48d 22m 50.3s on 2019-09-26.80632 UT (AT 2019rfj).
The OT unfiltered magnitude is 17.0m (mlim=18.6).
The OT is seen on 2 images on 2019-09-26 19:33:10, 19:21:06UT in MASTER-SAAO
and on 4 images on 2019-09-27 00:12:12-00:30:55 in MASTER-OAFA.
There is no minor planet at this place.
We have reference images on 2019-09-23.89472 UT (nearest in time) with unfiltered mlim=18.2m,
on 2018-07-18 19:59:48UT with mlim=19.0.
There is no optical sources in USNO-B1 (22m limit in history and >5m of current outburst ampl), the nearest optical source is Gaia one in 2.8" and Vista one in 2.2"
Spectral observations are required.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/162250.41-482250.3.png
Long variable
MASTER OT J163936.95-485803.9 optical detection
MASTER-OAFA auto-detection system discovered OT source at (RA, Dec) = 16h 39m 36.95s -48d 58m 03.9s with 0.7mag per 3 days variability
2019-09-24 02:34:57 m_OT = 16.5
2019-09-27 00:45:53 m_OT = 17.2
2018-07-08 03:29:49 mlim=18.1
There is infrared source in VIZIER database
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/163936.95-485803.9.png
MASTER Global Robotic Net
