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CI Aquilae: a recurrent nova with an unusually long plateau phase
Katsura Matsumoto, Ryoko Ishioka, Makoto Uemura +2
We present the results of optical photometry of the recurrent nova CI Aql in later phase of the outburst which occurred in 2000. Our observation revealed that the object reached th…
Photometric study of new southern SU UMa-type dwarf novae and candidates: V877 Ara, KK Tel and PU CMa
T. Kato, R. Santallo, G. Bolt +10
We photometrically observed three dwarf novae V877 Ara, KK Tel and PU CMa. We discovered undisputed presence of superhumps in V877 Ara and KK Tel, with mean periods of 0.08411(2) d…
Superhumps of CC Cancri Revisited
T. Kato, M. Uemura, R. Ishioka +1
We observed the 2001 November superoutburst of CC Cnc. This observation makes the first detailed coverage of a superoutburst of this object. The best-determined mean superhump peri…
Dramatic Changes in the Outburst Properties in V503 Cygni
T. Kato, R. Ishioka, M. Uemura
We examined the VSNET light curve of the unusual SU UMa-type dwarf nova V503 Cyg which is known to show a short (89 d) supercycle length and exceptionally small (a few) normal outb…
Outburst Photometry of the Eclipsing Dwarf Nova GY Cancri
T. Kato, R. Ishioka, M. Uemura
We observed the ROSAT-selected eclipsing dwarf nova GY Cnc (=RX J0909.8+1849) during the 2001 November outburst. We refined the orbital period to be 0.17544251(5) d. The fading por…
Rapid Optical Fluctuations in the Black Hole Binary, V4641 Sgr
Makoto Uemura, Taichi Kato, Ryoko Ishioka +8
We report on unprecedented short-term variations detected in the optical flux from the black hole binary system, V4641 Sgr. Amplitudes of the optical fluctuations were larger at lo…