The second bad news is that over two hours I was unable to find variability in the 20 sec data. The data showed a slow increase but so did the comparison star, Beta Ori. The ratio also showed an increase but the angular distance between their altitudes was changing and sometimes high. So the change in brightness might be easily attributed to a change in altitude.
The second good news is that data looked pretty well behaved, even though the moon was up and looking pretty ominous in NSL CI frames. Here is a quick plot:
![Image](http://nightskylive.net/temp/AlphaOri040107.gif)
This plot looks better than a previous plot because I realized that making the plot really big before copying it to the MS Paint program saves more pixels (duh!). The BMP file might be large but when Photoshop makes it a GIF the resulting file ends up really small -- 10K or less.
For Beteleguese, I think a better search with a better comparison technique over a longer time period can confirm that NSL data can see Betelgeuse variability.
- RJN