VSX J012426.9+084154 Update

Dave,

I'm referring to the dips indicated by the yellow arrows here;



I think what i'm referring to is the secondary minima. BTW did you take this data all in one session or over a few nights?

OK - now I see what you're talking about.

From left to right, the first red arrow is the second half of the primary minimum (~0.4 mag). The next (yellow) arrow is the secondary minimum (~0.1 mag). The next dip (not marked by you) is the primary minimum in its entirety. The next yellow arrow is the secondary minimum in its entirety and the final red arrow is the first half of the primary minimum.

Essentially, the plot is actually the same data repeated twice to show two full phases of the eclipse. That is the way AAVSO wants it plotted.

The single phase plot looks like this:


The gap betweeen the primary and secondary minima is simply a lack of data points, not an artificially generated gap... As you can see, the phased plot with two cycles (the plot you arrowed) starts at the bottom of the primary minimum and is then repeated twice.

The data was taken over 8 nights (8 sessions). The dates go from 17 October last year to 09 January this year. The period of close to 12 hours didn't help matters - parts of the curves were imaged a good few times. It was only the January data that really nailed the final period.

By the way, all the data (including full size plots) is publicly available on the AAVSO VSX website here: www.aavso.org/vsx/index.php?view=detail.top&oid=249715

Look to the bottom of the page - the additional data is clickable.

Hope that explains things a bit better...

Absolutely stunning work McDonald, David J. I understand now, I'm a bit slow on the uptake sometimes. Jeex 8 nights of data. With the way the weather has been thats some doing.

Blown away by this, well done mate.

Thanks Dave

Thats fine - understood.

Mark