VSX J012426.9+084154 Update

Folks - I managed to get a couple more nights worth of data and finally nailed VSX J012426.9+084154. The AAVSO VSX data is currently being reviewed but should be live in the next 24 hours or so. You saw it here first

The period is 0.48720 days (11.7 hours) with minima of 0.2 and 0.4 mags.

Here is a plot showing the data. Note that there are two cycles shown and the data has been binned to make the plot clearer.




Enjoy!
Dave

p.s. original material etc here: www.irishastronomy.org/index.php?option=...ew&catid=11&id=86864

The VSX database has been updated

www.aavso.org/vsx/index.php?view=detail.top&oid=249715

WOW Great stuff Dave,

Question: The data looks very symmetrical on both sides of the dip. Is there another smaller dip in between the main one and if so is this again due to eclipse/transit of the orbiting binary.

Congrats on this excellent work.

Not quite sure what you mean Dave but, starting from the left hand side of the plot:

The data starts off at the first (deepest) minima (i.e. mid-eclipse). This is a dip of about 0.4 to 0.5 mags.

The binary system then brightens again and as the two starts rotate about each other, the second minima starts and reaches a dip of about 0.15 mag.

We then see the start of the first minima in its totality.

Looking at the chart, the data to the right of large V dip in the centre of the plot is simply a repeat of the data on the left hand side. VSO's prefer to see two cycles on the same plot.

So, we have the first minima of 0.4 mags followed by a second minima of 0.1 mag.

In terms of time, each minima is about 2.4 hours each and the entire period is about 11.7 hours. This length od period is what reulted in data having to be collected over such a long time (well, weather conditions too!).

Hope that explains things a bit better.

Here's a YouTube video that also explains he basic principles: goo.gl/4R2NS

That's really good stuff there Dave.
The Youtube video helps and I can see why there is a second dip.

By phased I assume you mean you combine data from different observing sessions and combine them "in phase" - but I am not sure what you mean by "binned". It could be really obvious - but I'm not seeing it.

Really excellent work.

Mark C.

Mark - a phase plot attempts to determine the "period" of an object - asteroid, variable, exoplanet etc. The observations made over many days would normally be called "sessions". After all that processing, I could do with a good session...

Each session is added into the mix then the software takes over and using various algorithms, comes up with a period that fits the data. That final period found is then plotted onto a "phased" plot. Not sure if I just confused you more...

Binning just means averaging out adjacent points. If I bin by two, I get the average point of 2 adjacent points. In this case, I binned by five. So each point on the plot is in fact an average of five data points. It makes the chart clearer - there is in fact five times more data in it than you can see.

Glad you like the work though