MASTER-SAAO: new OT

ATel #11534; P. Balanutsa, V. Lipunov (Lomonosov MSU), D. Buckley (SAAO), E. Gorbovskoy, V. Kornilov, N. Tiurina, A. Kuznetsov, V. Vladimirov, D. Vlasenko, V. Chazov, O. Gress, D. Zimnukhov, D. Kuvshinov, V. Shumkov, V. Gorelkina, T. Pogrosheva, A. Gabovich (Lomonosov MSU, SAI)
on 13 Apr 2018; 22:51 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Request for Observations, Cataclysmic Variable, Transient, Variables

MASTER OT J185835.32-354042.2 discovery - new OT, preliminary dwarf nova outburst, ampl>5.3m

MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 18h 58m 35.32s -35d 40m 42.2s on 2018-04-12.08618 UT.
The OT unfiltered magnitude is 16.7m (mlim=19.0).
The OT is seen in 2 image. There is no minor planet at this place.
We have reference image on 2015-08-15.96315 UT with unfiltered mlim= 19.0m.
There is no any known sources in VIZIER database, it means 22mag POSS limit and more then 5.3mag of current amplitude.
Spectral observations are required.
http://master.sai.msu.ru/static/OT/185835.32-354042.2.png

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net