54 citations · 385 across the 25 of their papers we have counts for
34 papers · 1 filter
Analysis of full-disc H alpha observations: Carrington maps and filament properties in 1909-2022
Theodosios Chatzistergos, Ilaria Ermolli, Dipankar Banerjee +14
Full disc observations of the Sun in the H line provide information about the solar chromosphere and in particular about the filaments, which are dark and elongated features tha…
Investigating the effect of solar ambient and data characteristics on Ca II K observations and line profile measurements
M. Murabito, I. Ermolli, T. Chatzistergos +3
We analysed state-of-the-art observations of the solar atmosphere to investigate the dependence of the \ca brightness of several solar features on spectral bandwidth and spatial re…
Rome Precision Solar Photometric Telescope: precision solar full-disk photometry during solar cycles 23-25
Ilaria Ermolli, Fabrizio Giorgi, Theodosios Chatzistergos
The Rome Precision Solar Photometric Telescope (Rome/PSPT) is a ground-based telescope engaged in precision solar photometry. It has a 27-year database of full-disk images of the p…
Full-disc Ca II K observations -- a window to past solar magnetism
Theodosios Chatzistergos, Natalie A. Krivova, Ilaria Ermolli
First such observations were made in 1892 and since then various sites around the world have carried out regular observations, with Kodaikanal, Meudon, Mt Wilson, and Coimbra being…
Scrutinizing the relationship between plage areas and sunspot areas and numbers
Theodosios Chatzistergos, Ilaria Ermolli, Natalie A. Krivova +3
Studies and reconstructions of past solar activity require data on sunspots as well as faculae/plage and network. Such data are also important for understanding the magnetic activi…
Quantifying Properties of Photospheric Magnetic Cancellations in the Quiet Sun Internetwork
Vincent E. Ledvina, Maria D. Kazachenko, Serena Criscuoli +7
We analyzed spectropolarimetric data from the Swedish 1-meter Solar Telescope to investigate physical properties of small-scale magnetic cancellations in the quiet Sun photosphere.…