[vsnet-alert 9782] Re: OT_J111217.4-353829: revised early superhump period

[Daisaku NOGAMI]

Dear colleagues,

Kenzo Kinugasa obtained three optical spectra (~4000-8000A)
of this star around Dec. 25.83 (UT) at Gunma Astronomical
Observatory with a 1.5-m telescope and a low resolution
spectrograph.  The combined spectrum is a typical one of
dwarf novae in outburst, showing a very blue continuum
having singly peaked Halpha and He I emission lines, an
emission core superposed on the shallow Hbeta absorption
line, He II 4686 and CIV 5802/5812 in emission.  This
spectrum and the photometric results reported by H. Maehara
(vsnet-alert 9775/9778) indicate that OT J1112 is a WZ Sge-
type dwarf nova, having an intermediate inclination,
caught during the very early phase of a superoutburst.
This should be a Christmas present for southern observers.
Follow-up observations are strongly encouraged!

When you obtain time-resolved photometric data, please
send them to vsnet-campaign-report at ooruri.kusastro.kyoto-u.ac.jp.
When you carry out spectroscopy, please feel free to
make a contact with me (nogmai at kwasan.kyoto-u.ac.jp).

Best regards,
Daiskau Nogami
VSNET Collaboration Team