[vsnet-alert 25377] Re: TCP J10203579+3103424: long-period early superhumps?

[Graeme Coates]

I have this evening completed approximately 6 hours of observation of this
object using a 350mm reflector and ST2000XM CCD using CV filter in cold
clear conditions from the UK.

There are some indications of variations in brightness with amplitude of
approx 0.025mag as per the above message, though weak. The data has been
uploaded into the AAVSO and BAA databases for further analysis of the light
curve.

Graeme

On Tue, 9 Feb 2021 at 01:09, Taichi Kato <tkato at kusastro.kyoto-u.ac.jp>
wrote:

> TCP J10203579+3103424: long-period early superhumps?
>
>    Kyoto U. team, Itoh-san, Tamas Tordai and Kiyota-san
> have reported observations.  An analysis has yielded
> the possible presence of low-amplitude (0.025 mag)
> early superhumps.  The profile looks double wave
> with a period of 0.0806(2) d.  Since the signal is
> weak, this period may be spurious.  But if correct,
> the period is longer than ASASSN-16eg (0.07548 d).
> The true period will become evident as ordinary
> superhumps appear.  Please continue observations
> to detect possible early superhumps and stage A
> superhumps.
>
>