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(1993 Jan. 10)
subject: T Leo: superhumps confirmed
T Leonis
Following preliminary results have been obtained from CCD photometry
on Jan. 8. (Ouda station, 60-cm + CCD, V band)
1) Continuatin of the outburst.
The mean magnitude is steady at about V=11.0 (based om GSC V=11.9).
2) Detection of definite superhumps.
* Hump amplitude was 0.10 mag in V. Steep rise and gradual decline.
Secondary humps were not prominent.
* Hump maxima occurred at 8.703, 8.769, 8.829, 8.894 UT.
The times are well represented by the equation:
Max.UT = 8.704 + 0.0633 E
The period is 7.6% longer than the orbital one. This period is
close to that obtained during Jan. 1987 superoutburst (P=0.06411;
Variable Star Bulletin, VSOLJ). The present one is slightly shorter,
but this difference is resonably explained by the fact that the present
superoutburst is fainter than 1987 one.
3) Connection with Jan. 5 hump features.
Although cycle count is ambiguous because of 3-day gap and possible
period change, the most probale periods are obtained assuming 45 or 44
superhump cycles between 5.872UT and 8.704UT.
Max.UT = 8.704 + 0.06289E (45 cycles)
Max.UT = 8.702 + 0.06424E (44 cycles)
Regards,
Taichi Kato
Return to the Powerful Daisaku
vsnet-adm@kusastro.kyoto-u.ac.jp
