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Welcome to the Data Analysis forum!

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David Benn
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Welcome to the AAVSO Data Analysis forum!

Thanks to Rebecca for setting it up and to everyone at HQ for their support of the idea.

This forum starts with the thought: "So now that I have a time series of observations from CCD/DSLR photometry, PEP, or visual estimation, what do I do now?" 

The purpose the forum is to:

  1. discuss methods and tools for variable star data (light curve) analysis;
  2. encourage, and in some cases be a home for, data analysis projects.

In scope is discussion about the theory and application of variable star data analysis methods as enabled by tools like Period04PeransoVStar, TS, WinWWZ, in particular:

  • statistical analysis
  • data search/filtering
  •  
  • period analysis including Fourier analysis, pre-whitening, models, residuals
  • time-frequency analysis

The motivation for the forum arose from the "Project LAVA" topic that recently started on the Visual Observing forum. That topic will be moved over to this forum soon.

If you have questions or suggestions for forum content, feel free to post here.

Regards,

David Benn (BDJB)

It's a very good idea David.
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rmu
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It's a very good idea David. I hope to learn from experienced analysers and get skills to analyse data if some day it's needed for some project.

Regards

Data Analysis Forum
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daveh
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This is great!  I've been in recent contact with Dr. Hendon regarding a data mining/data analysis forum for AAVSO.  He indicated that there was some interest in this topic.

I've been involved recently with the Lowell Obseratory Lowell Amateur Research Initative (LARI) MGED project that does data mining and analysis for exoplanet transient research.  We use several analysis tools, including some homegrown tools as well as MPO Canopus (developed for asteroid analysis but still good for variable star/exoplanet analysis).  I've also used VStar and algorithms from the NASA Exoplanet Archive (Lomb-Scargle, Box-fitting Least Squares-BLS, and Plavchan PDM) for my LARI work.

For LARIMGED we use a Yahoo user group for day-to-day communications and a wiki to upload analysis results, post detailed technical information, etc.  It seems to work very well.

So, I would love to be an active participant in this forum as well as LAVA.  Please let me know how I can contribute to these forums.

 

Dave Hinzel (HDHA)

Hi Miguel Thanks. I look
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David Benn
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Hi Miguel

Thanks. I look forward to learning a lot too. :P

David

Hi Dave Thanks for your
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David Benn
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Hi Dave

Thanks for your post. Interesting!

I'm not sure whether you've seen the Data Mining links on the AAVSO Research Portal page. Apart from this forum, perhaps Arne was also thinking about that, among other things.

I'll post again soon to the LAVA thread re: access to documents created so far, much of which has been done by Pete Brock (see the LAVA topic) up to this point. There's plenty to be done. 

The practice of using a wiki makes a lot of sense to me. I have used them in various contexts for several years and they're hard to beat for rich collaboration.

David (BDJB)

Data Analysis Forum
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daveh
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David,

How do we begin to do data analysis work within this forum?  Is there a database of objects we can analyze with the various tools or do we need to access observational data from other forums?

I'm very interested in getting started with this effort.  Any information will be appreciated.

Thanks,

Dave

Hi Dave If you are
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David Benn
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Hi Dave

If you are interested in contributing to Project LAVA, the best place to start is to post to that topic. You can look at the docs there and request access to the Google Docs if you would like to.

No other particular analysis project has been proposed in this forum yet, but suggestions are welcome.

I'm currently preparing a new VStar release (within the next week I hope) and will devote more energy to this forum after that.

David

Thanks!
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daveh
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David,

 

I'll do just that.  Thanks again.

Dave H.

Using the Data Analysis wiki
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David Benn
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Hi all

Apologies for my recent silence. My son sustained a knee injury recently. The hospital stay and home care have keep my family occupied for awhile. More recently, being interstate for work and getting a VStar release out have added to the pre-occupation.

Will, Matt and I corresponded about the data analysis wiki. The end result is that the wiki we started with is still considred to be OK. To use it, you need to create a login via: 

  http://www.aavso.org/data-analysis/wiki/HelpOnLogin?action=login

This will allow you to view the data analysis pages (e.g. LAVA):

  http://www.aavso.org/data-analysis/wiki/LAVA%3A%20Low%20Amplitude%20Visual%20Analysis

but to edit (modify, add) them you will need to send an email to Will McMain (will@aavso.org) saying that you want to do so; he will change your permissions. I suspect that myself and some others may also be able to do this in the near future, so feel free to CC me on the email.

David

AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484