Historical solar Ca II K observations at the Rome and Catania observatories

Fabrizio Giorgi; Ilaria Ermolli; Mariachiara Falco; Natalie A. Krivova; Paolo Romano; Salvo L. Guglielmino; Sami K. Solanki; Theodosios Chatzistergos

arxiv: 1902.07483 · v1 · pith:TOHHSHWMnew · submitted 2019-02-20 · 🌌 astro-ph.SR

Historical solar Ca II K observations at the Rome and Catania observatories

Theodosios Chatzistergos , Ilaria Ermolli , Mariachiara Falco , Fabrizio Giorgi , Salvo L. Guglielmino , Natalie A. Krivova , Paolo Romano , Sami K. Solanki This is my paper

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keywords archivescataniaobservatoriesromeanalyseareasderivedigitised

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Here we present the little explored Ca II K archives from the Rome and the Catania observatories and analyse the digitised images from these archives to derive plage areas.

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Historical solar Ca II K observations at the Rome and Catania observatories

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