(from AAVSO NEWS FLASH No. 18)
CC CANCRI
The dwarf nova type (U Gem subclass) cataclysmic variable CC Cnc is
in outburst as indicated by the following observations:
AAVSO Observer
UT JD Mag. Initials
MAY 7.0743 2450210.5743 14.5 BRJ
MAY 7.1958 2450210.6958 <13.3 BTH
MAY 8.1972 2450211.6972 13.5 BTH
MAY 9.2299 2450212.7299 13.1 BTH
The last outburst of this star began on March 22, 1995 and reached
magnitude 13.2 at maximum on March 25.
(vsnet-alert 415, T. Kato)
As already reported in the AAVSO News Flash No. 18, the dwarf nova CC Cnc is undergoing an outburst. V-band CCD photometry at Ouda Staion (Kyoto University) has revealed clear superhumps with an amplitude of 0.28 mag.
mid-UT V-C S.D. N band V-mag
--------------------------------- -----
960514.496 2.091 0.084 55 V 13.99
960515.482 2.209 0.090 76 V 14.11
comparison: VSNET 11.90
instruments: 60-cm telescope + CCD + V-filter
observers: T. Kato and D. Nogami
Determination of the superhump period is rather difficult due to the short observing window. The most probable period is 0.0759 day, or its one-day alias 0.0820 day. This finding has confirmed earlier detection of superhump-like variations during the 1993 Feb. outburst through insufficient sky conditions. Re-analysis of the latter data gives a period of 0.0761 (or 0.0822, less likely) day. The present observations seem to preclude the clamied orbital period of 0.0942 day (Munari et al. 1990, IAUC No. 5024), which has entitled CC Cnc a rare dwarf nova in the CV period gap.
Follow-up observations at different longitudes are encouraged.
Regards,
Taichi Kato and Ouda team
(submitted to PASJ)
Paper
TeX files and figures
vsnet-adm@kusastro.kyoto-u.ac.jp
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