[vsnet-campaign-dn 14986] MASTER OT J172758.09+380021.5 outburst
Taichi Kato
tkato at kusastro.kyoto-u.ac.jp
Thu Nov 12 09:30:57 JST 2020
MASTER OT J172758.09+380021.5 outburst
According to the ZTF data, this object is not an ordinary
SU UMa star (see vsnet-alert 23720, 24112).
2018 Mar-Apr. superoutburst: two post-superoutburst rebrightenings
and a slow fading tail like a WZ Sge star.
2018 July-Aug. superoutburst: deep dip in the middle of
a superoutburst.
2019 Jan.-Feb: long rebrightening.
Currently, the supercycle appears to be ~70 d.
Thorstensen's spectrum did not show enhanced helium lines.
This object probably needs to be studied in detail.
(Could it be a WZ Sge star mimic or EI Psc-type object?)
YYYYMMDD(UT) mag observer
20201023.1179 17.890zr (Zwicky Transient Facility Lasair (Masci+ 2019))
20201028.1181 17.977zr (Zwicky Transient Facility Lasair (Masci+ 2019))
20201101.1589 16.600zr (Zwicky Transient Facility Lasair (Masci+ 2019))
20201104.0811 18.009zr (Zwicky Transient Facility Lasair (Masci+ 2019))
20201111.1389 14.521zr (Zwicky Transient Facility Lasair (Masci+ 2019))
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