MASTER: bright high amplitude CV
ATel #11380; T. Pogrosheva, V. Lipunov (Lomonosov MSU),D. Buckley (SAAO), E. Gorbovskoy, V. Kornilov, N. Tiurina, P. Balanutsa, A. Kuznetsov, V. Vladimirov, D. Kuvshinov (Lomonosov Moscow State University, SAI), R. Podesta (OAFA), H. Levato(ICATE), V. Shumkov, A. Gabovich (BSPU)
on 7 Mar 2018; 22:22 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)
Subjects: Optical, Request for Observations, Cataclysmic Variable, Transient, Variables
MASTER OT J195210.21-614104.9 detection - bright (15.9) dwarf nova outburst with ampl>5.6
MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 19h 52m 10.21s -61d 41m 04.9s on 2018-03-05.05144 UT.
The OT unfiltered magnitude is 15.9m(mlim=19.1).
The OT is seen in 8 images. There is no minor planet at this place.
We have reference images on 2015-05-20.95497 UT with unfiltered mlim= 20.5m (MASTER-SAAO), on 2017-11-24 01:03:29UT with mlim=18.5 (MASTER-OAFA).
There is only B2=19.6 in USNO-B1, it means more then 5.6mag(B2,R2)-6mag(R1,B1) current amplitude and preliminary UGSU classification.
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/195210.21-614104.9.png
List of Optical Transients discovered by MASTER
MASTER Global Robotic Net
