69 citations · 245 across the 10 of their papers we have counts for
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Cross-Calibrating Sunspot Magnetic Field Strength Measurements from the McMath-Pierce Solar Telescope and the Dunn Solar Telescope
Fraser T. Watson, Christian Beck, Matthew J. Penn +3
In this article we describe a recent effort to cross-calibrate data from an infrared detector at the McMath-Pierce Solar Telescope and the Facility InfraRed Spectropolarimeter (FIR…
A Multi-Instrument Analysis of Sunspot Umbrae
Fraser T. Watson, Matthew J. Penn, William C. Livingston
The recent solar minimum and rise phase of solar cycle 24 have been unlike any period since the early 1900s. This article examines some of the properties of sunspot umbrae over the…
Image patch analysis of sunspots and active regions. II. Clustering via matrix factorization
Kevin R. Moon, Veronique Delouille, Jimmy J. Li +3
Separating active regions that are quiet from potentially eruptive ones is a key issue in Space Weather applications. Traditional classification schemes such as Mount Wilson and Mc…
Image patch analysis of sunspots and active regions. I. Intrinsic dimension and correlation analysis
Kevin R. Moon, Jimmy J. Li, Veronique Delouille +3
The flare-productivity of an active region is observed to be related to its spatial complexity. Mount Wilson or McIntosh sunspot classifications measure such complexity but in a ca…