Historical solar Ca II K observations at the Rome and Catania observatories
Abstract
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.
- Publication:
-
Nuovo Cimento C Geophysics Space Physics C
- Pub Date:
- January 2019
- DOI:
- 10.1393/ncc/i2019-19005-2
- arXiv:
- arXiv:1902.07483
- Bibcode:
- 2019NCimC..42....5C
- Keywords:
-
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 5 pages, 3 figures, to be published in "Nuovo Cimento C" as proceeding of the Third Meeting of the Italian Solar and Heliospheric Community