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(1993 Jan. 4)
subject: observation of T Leo
T Leonis
CCD observations of T Leo on Jan. 2 indicate this star was rapidly
fading. The observations were performed from 2.750 to 2.895 UT with the
time resolution of 30 s. The sky was very clear and I could cover more
than two full orbital cycles of this dwarf nova with typical error of
single observations less than 0.01 mag.
During this period, T Leo faded by 0.2 mag. Superimposed were hump
features of 0.1 mag with maxima at 2.807 and 2.865 UT. The interval
suggests this variation is not caused by superhumps, but by orbital
modulation.
Subsequent observation tonight confirms rapid fading. The star
looks at about V=11.8 on the TV monitor.
Regards,
Taichi Kato
Return to the Powerful Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
