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Paper about sunspot measurements and solar observation calibrations

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stellakafka
stellakafka's picture
Paper about sunspot measurements and solar observation calibrations

Friends,

 

A new paper appeared on arXiv today, discussing the dependence of Sunspot group sizes on the level of solar activity and its influence on the calibration of solar observation. A nice analysis on k-factors is included. The paper can be accessed through:

https://arxiv.org/abs/1609.00569

 

Enjoy!

Best wishes - clear skies,

Stella.

HRHA
HRHA's picture
Another new paper on group numbers

Here's a recent open Springer pub on a 'Revised Collection of Sunspot Group Numbers'.  What's neat about this article is that the revised database has included over 28,000 solar observations from the AAVSO archives on Luft and Cragg data.  Thanks to Leif Svalgaard, and Mike Saladyga for digitizing Luft's note books and Cragg's drawings. 

http://www.readcube.com/articles/10.1007/s11207-016-0982-2?author_access...

Rodney

 

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