エントリー

2011年01月04日の記事は以下のとおりです。

[dwarf nova] OT J230425.8+062546 : g'-band light curve

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We performed time series g'-band photometry of OT J230425.8+062546 (hear after J2304) for 2 hours on Jan. 3  using Araki telescope with ADLER. Our light curve of the object is shown in the figure(red data). We possibly detected a small variation with amplitudes of 0.03--0.05 mag during our run.  No other significant variations were detected. This featur of light curve was also detected at Osaka Kyoiku University tonight. Spectra of J2304 suggest that it would be dwarf nova (c.f. CBET 2617 and our spectrum). The current outburst of J2304 does not look like a normal outburst because of a large amplitudes. Ordinary SU-UMa dwarf novae show superhumps with amplitudes > 0.1 mag from its early phase.  Our result implies that J2304 might be a WZ Sge star viewed nearly face-on.

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