[vsnet-alert 19614] MASTER OT J151126.74-400751.9: new SU UMa-type dwarf nova

Taichi Kato tkato at kusastro.kyoto-u.ac.jp
Tue Mar 22 11:52:19 JST 2016

MASTER OT J151126.74-400751.9: new SU UMa-type dwarf nova

   Josch Hambsch has reported observations.  The object
shows superhumps with a period of 0.0614(4) d.

ATel report:

ATEL #8843                                                           ATEL #8843

Title:  MASTER-SAAO: bright dwarf nova outburst (ampl > 5.2m)
Author: E. Popova, V. Lipunov (Lomonosov MSU), D. Buckley, S. Potter,
                A. Kniazev (South African Astonomical Observatory), E. Gorbovskoy,
                N. Tiurina, P. Balanutsa, O. Gress, V. Kornilov, A. Kuznetsov, V.
                Vladimirov, D. Vlasenko, I. Gorbunov, V. Shumkov, D. Kuvshinov (Lomonosov
                Moscow State University, SAI)
Queries:        tiurina at sai.msu.ru
Posted: 19 Mar 2016; 06:37 UT
Subjects:Optical, Request for Observations, Cataclysmic Variable,
                Transient, Variables

MASTER OT J151126.74-400751.9 discovery - bright (14m) dwarf nova outburst,

MASTER-SAAO auto-detection system ( <A HREF="http://www.hindawi.com/journals/aa/2010/349171/
et al., "MASTER Global Robotic Net",  
Advances in Astronomy, 2010, 349171</A> ) discovered OT source at (RA,
Dec) = 15h 11m 26.74s -40d 07m 51.9s on 2016-03-18.05975 UT.

The OT unfiltered magnitude is 
(the limit is 19.8m).

The OT is seen in 11 images. There is no minor planet at this place.

We have reference image with m_OT=19.2 on 2015-03-30 23:40:01.902, m_OT=18.8
on 2015-04-26.06633 UT( with unfiltered magnitude limit 19.5m).So we suggest
the amplitude of outbursts is more then 5.2

Spectral observations are required.

The discovery and reference images are available at http://master.sai.msu.ru/static/OT/15112

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