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CAL 86: further data from Bernard Heathcote Dear Colleagues, Bernard Heathcote has provided further data on CAL 86 on Feb. 25. Although there is weak modulations, the object was fading rapidly (about 2 mag/d). The light curve bears some resemblance to short (normal) outbursts of NSV 10934 (Kato et al. (2002) A&A 396, 929). Combined with the unusual X-ray strength and the precipitous fading during the late outburst stage, the same discussion in HT Cam and NSV 10934 would apply to CAL 86. Interestingly, there seem to be some indication of short-term periodicity around 0.025-0.030 d (and its harmonic). These period may be related to, although they look a bit too long and may be a harmonic signal of the orbital period, to spin-related modulations as observed in HT Cam. Further detailed observations during the next outbursts are strongly encouraged. Regards, Taichi Kato VSNET Collaboration team
Return to the Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
