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Spiral Structure in WZ Sagittae around the 2001 Outburst Maximum
Hajime Baba, Kozo Sadakane, Yuji Norimoto +6
Intermediate resolution phase-resolved spectra of WZ Sge were obtained on five consecutive nights (July 23 -- 27) covering the initial stage of the 2001 superoutburst. Double-peake…
The 1996-1997 Fading of V651 Mon, the Binary Central Star of the Planetary Nebula NGC 2346
Taichi Kato, Daisaku Nogami, Hajime Baba
V651 Mon is the binary central star of the bipolar planetary nebula NGC 2346. The star showed the second-ever deep fading in 1996-1997, which was presumably caused by obscuration b…
IR Com: Deeply Eclipsing Dwarf Nova Below the Period Gap -- A Twin of HT Cas?
Taichi Kato, Hajime Baba, Daisaku Nogami
We observed an X-ray selected, deeply eclipsing cataclysmic variable IR Com (=S 10932). We detected an outburst occurring on 1996 January 1. The light curve of the outburst closely…