Rome Precision Solar Photometric Telescope: precision solar full-disk photometry during solar cycles 23–25 by Ilaria Ermolli, Fabrizio Giorgi, Theodosios Chatzistergos

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Full-disc Ca ii K observations—A window to past solar magnetism by Theodosios Chatzistergos, Natalie A. Krivova, Ilaria Ermolli

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Differential Rotation of the Solar Chromosphere: A Century-long Perspective from Kodaikanal Solar Observatory Ca ii K Data by Dibya Kirti Mishra, Srinjana Routh, Bibhuti Kumar Jha, Theodosios Chatzistergos, Judhajeet Basu, Subhamoy Chatterjee, Dipankar Banerjee, Ilaria Ermolli

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The Extreme Space Weather Event of 1872 February: Sunspots, Magnetic Disturbance, and Auroral Displays by Hisashi Hayakawa, Edward W. Cliver, Frédéric Clette, Yusuke Ebihara, Shin Toriumi, Ilaria Ermolli, Theodosios Chatzistergos, Kentaro Hattori, Delores J. Knipp, Séan P. Blake, Gianna Cauzzi, Kevin Reardon, Philippe-A. Bourdin, Dorothea Just, Mikhail Vokhmyanin, Keitaro Matsumoto, Yoshizumi Miyoshi, José R. Ribeiro, Ana P. Correia, David M. Willis, Matthew N. Wild, Sam M. Silverman

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