TmzV85 20000108.463 176C Scp TmzV85 20000113.509 140C Scp TmzV85 20000114.512 140C Scp TmzV85 20000115.440 140C Scp Sequence: VSNet (V magnitudes) Instrument: IRO (0.5-m RCT + AP-8)Only one previous outburst of this cataclysmic variable has been recorded (cf. vsnet-obs 18078 below).
USNO-A2.0 data for TmzV85: R.A. 10h43m57.097s Decl. +58o07'33.20" (J2000.0) r= 16.2, b= 16.4 Arne Henden's data: R.A. 10h43m56.81s Decl. +58o07'32.6" (J2000.0) V= 17.906, B-V= +0.191
Time-resolved photometry and spectroscopy during the current outburst are very urgently required.
New Takamizawa variable (TmzV85)
Kesao Takamizawa (Nagano, Japan) reports his discovery of a new variable star (TmzV85).
TmzV85 = USNO1425.07642945 104357.124 +580733.30 (2000.0) 16.3 16.9 Takamizawa's comment: The images were confirmed on two patrol films. I have checked known minor planet. If the USNO color is neutral, the star may be a UG-type with a range of 13.0-<15.3p. Photographic magnitude estimates by VSOLJ members object YYMMDD(UT) mag code TmzV85 941111.792 <153p Tmz.VSOLJ TmzV85 950101.755 <153p Tmz.VSOLJ TmzV85 950207.704 <153p Tmz.VSOLJ TmzV85 950420.474 <153p Tmz.VSOLJ TmzV85 951118.781 <153p Tmz.VSOLJ TmzV85 960101.772 <149p Tmz.VSOLJ TmzV85 960407.480 <149p Tmz.VSOLJ TmzV85 970227.451 <144p Tmz.VSOLJ TmzV85 970330.490 <144p Tmz.VSOLJ TmzV85 970426.485 <142p Tmz.VSOLJ TmzV85 971026.719 <144p Tmz.VSOLJ TmzV85 971026.763 <149p Tmz.VSOLJ TmzV85 971101.753 <149p Tmz.VSOLJ TmzV85 971109.751 130p Tmz.VSOLJ TmzV85 971109.756 134p Tmz.VSOLJ TmzV85 980121.581 <149p Tmz.VSOLJ TmzV85 980322.550 <153p Tmz.VSOLJ TmzV85 980417.495 <149p Tmz.VSOLJ TmzV85 981024.812 <149p Tmz.VSOLJ TmzV85 981115.810 <149p Tmz.VSOLJ Observer's code: Tmz: K.Takamizawa (Saku-machi,Nagano,Japan) Inst.: 10cmR F4 twin patrol cameras T-Max400 120 Comparison stars mag.:GSC
TmzV85 outburst confirmed
We started tonight observation on TmzV85, and confirmed the outburst. The current magnitude is 14.0, indicating that it is still in bright state (cf. vsnet-alert 4027 and 4028). We are planning 2-hour run on this object tonight.
Makoto Uemura and Taichi Kato
TmzV85 eclipsing SU UMa-type dwarf nova in superoutburst!!!
From the data obtained last night ([vsnet-alert 4035]), we discovered that TmzV85 is SU UMa-type dwarf nova with eclipse. The light curve obtained last night clearly shows two superhumps and two eclipses. The eclipse is deep (1.3 mag), the duration of eclipse is about 15 min. The orbital period estimated from these two eclipses is 0.0736 day. The superhump amplitude is about 0.5 mag. This observarion confirms that TmzV85 belongs to a rare class of deeply eclipsing SU UMa-type dwarf novae.
We started tonight observation on TmzV85 at 10:00 (UT). We plan 10-hour observation tonight.
We will undertake an intensive observing campaign on this object, as we have had a very successful one in QY Per and DV UMa (in preparation for ongoing publications). Please post timely to vsnet-alert confirmatory observations, new findings, the progress of the outburst and observations.
Longer observations are strongly encouarged to precisely determine the physical parameters of the object. Collaborating observations should be sent (as usual) to firstname.lastname@example.org. We will set up a special page on TmzV85, as we have had on DV UMa and QY Per.
Makoto Uemura and Taichi Kato
DV UMa (related system, 1999)
HT Cas (related system)
Representative light curve during post-superoutburst
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