[vsnet-alert 24825] AY Lac - updated superhump period

反保雄介 tampo at kusastro.kyoto-u.ac.jp
Wed Oct 21 04:27:26 JST 2020

AY Lac - updated superhump period

Kyoto Univ. Obs. also performed time-resolved photometry for AY Lac for
~3.5 hrs on 20th Oct.
Superhumps with an amplitude of 0.15 mag and a period of 0.0568(3) d were
observed, thus the shorter one suggested by Tonny is likely a real signal.


2020年10月21日(水) 3:52 Tonny Vanmunster tonny.vanmunster at gmail.com via
vsnet-alert <vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp>:

> Dear colleagues,
> Further to yesterday's message, I have now been able to combine my Oct
> 18/19 and Oct 19/20 datasets of AY Lac. Both runs were seriously hampered
> by clouds. Using the ANOVA, Lomb-Scargle, Generalized-Lomb-Scargle and PDM
> methods (Peranso 3.0, in Beta testing), I derived a combined superhump
> period value of 0.0595 +/- 0.0009d. However, there's a second prominent
> peak at 0.0766d, be it with a lower power value. The amplitude of the
> superhumps was 0.29 mag.
> Follow-up observations are strongly recommended to accurately determine
> the superhump period.
> Best regards
> Tonny
> --
> Tonny Vanmunster
> CBA Belgium Observatory
> CBA Extremadura Observatory
> www.cbabelgium.com
> Beta testers wanted for Peranso 3.0


Kyoto University, Graduate School of Department of Astronomy
Yusuke TAMPO
MAIL: tampo at kusastro.kyoto-u.ac.jp


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