69 citations · 210 across the 9 of their papers we have counts for
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astro-ph.SR2017★ 7 cited
The ratio between the number of sunspot and the number of sunspot groups
K. Georgieva, A. Kilcik, Yu. Nagovitsyn +1
Data from three solar observatories, Learmonth, Holloman, and San Vito, are used to study the variations in the average number of sunspots per sunspot group. It is found that the d…
astro-ph.SR2017★ 1 cited
About the recalibration of the sunspot record
Katya Georgieva, Ali Kilcik, Yury Nagovitsyn +1
In 2015 the calculation of the International (Zurich) sunspot number was cancelled, and it was replaced by a new "recalibrated" series. A new data series was proposed also for the…