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330days since
Project Launch

Olin Eggen was an astronomer, a photometerist; he measured the brightness of stars. But being of the last generation, his data was not recorded on a computer. He used 3x5 index cards. Lots of them. The goal of this project is to make the data he recorded in the last century available to researchers today.

The AAVSO acquired the cards of his observations back in 2009 and introduced the project in a posting that you should review at . All the cards were scanned into PDF's. We've gone the second step and put these card images into a database.

The third step of the project is to have someone examine each card and identify the star(s) that were observed on each card. When we've done this for all the cards a researcher will be able to key in a star reference and be able to summon up to his screen all of the relevant cards. To be clear: we are not interpreting the data on the card, only looking for the star reference.

There are 108,000 cards that need to be examined. These cards are grouped into 2,216 PDF's, which are grouped into 258 bundles which are grouped into 64 boxes.  So, a card can be identified by its Box/Bundle/PDF/Page address. On average, there are 48 cards per PDF and 8 PDF's per bundle.

We are looking for volunteers to help process these cards. An interface has been established to facilitate the work. You can look at this at by clicking on  Eggen Card Portal in the sidebar. Without a username, you can still request a batch of cards to examine. Try Box 1A, Bundle A, PDF 1 and peruse.

If you are a member of the AAVSO and would like to participate, please email your request. You will be assigned a bundle of cards and a username and password. Read the instructions page and have at it!


Subpages (2): Instructions Presentation