First-authored, refereed papers of T. Chatzistergos, ordered by citations

A list of first-authored, refereed publications of T. Chatzistergos, derived from the SAO/NASA Astrophysics Data System (ADS) and ordered by the numbers of citations.

Orcid ID: 0000-0002-0335-9831

81	New reconstruction of the sunspot group numbers since 1739 using direct calibration and "backbone" methods Chatzistergos, Theodosios, Usoskin, Ilya G., Kovaltsov, Gennady A., Krivova, Natalie A. & Solanki, Sami K., 2017, A&A, 602, A69
52	Analysis of full disc Ca II K spectroheliograms. II. Towards an accurate assessment of long-term variations in plage areas Chatzistergos, Theodosios, Ermolli, Ilaria, Krivova, Natalie A. & Solanki, Sami K., 2019, A&A, 625, A69
50	Analysis of full-disc Ca II K spectroheliograms. III. Plage area composite series covering 1892-2019 Chatzistergos, Theodosios, Ermolli, Ilaria, Krivova, Natalie A., Solanki, Sami K., Banerjee, Dipankar, Barata, Teresa, Belik, Marcel, Gafeira, Ricardo, Garcia, Adriana, Hanaoka, Yoichiro, Hegde, Manjunath, Klimeš, Jan, Korokhin, Viktor V., Lourenço, Ana, Malherbe, Jean-Marie, Marchenko, Gennady P., Peixinho, Nuno, Sakurai, Takashi & Tlatov, Andrey G., 2020, A&A, 639, A88
40	Recovering the unsigned photospheric magnetic field from Ca II K observations Chatzistergos, Theodosios, Ermolli, Ilaria, Solanki, Sami K., Krivova, Natalie A., Giorgi, Fabrizio & Yeo, Kok Leng, 2019, A&A, 626, A114
39	Analysis of full disc Ca II K spectroheliograms. I. Photometric calibration and centre-to-limb variation compensation Chatzistergos, Theodosios, Ermolli, Ilaria, Solanki, Sami K. & Krivova, Natalie A., 2018, A&A, 609, A92
29	Long-term changes in solar activity and irradiance Chatzistergos, Theodosios, Krivova, Natalie A. & Yeo, Kok Leng, 2023, Journal of Atmospheric and Solar-Terrestrial Physics, 252, 106150
27	Full-disc Ca ii K observations—A window to past solar magnetism Chatzistergos, Theodosios, Krivova, Natalie A. & Ermolli, Ilaria, 2022, Frontiers in Astronomy and Space Sciences, 9, 336
27	Reconstructing solar irradiance from historical Ca II K observations. I. Method and its validation Chatzistergos, Theodosios, Krivova, Natalie A., Ermolli, Ilaria, Yeo, Kok Leng, Mandal, Sudip, Solanki, Sami K., Kopp, Greg & Malherbe, Jean-Marie, 2021, A&A, 656, A104
23	Delving into the Historical Ca II K Archive from the Kodaikanal Observatory: The Potential of the Most Recent Digitized Series Chatzistergos, Theodosios, Ermolli, Ilaria, Solanki, Sami K., Krivova, Natalie A., Banerjee, Dipankar, Jha, Bibhuti K. & Chatterjee, Subhamoy, 2019, Solar Physics, 294, 145
23	Modelling solar irradiance from ground-based photometric observations Chatzistergos, Theodosios, Ermolli, Ilaria, Giorgi, Fabrizio, Krivova, Natalie A. & Puiu, Cosmin Constantin, 2020, Journal of Space Weather and Space Climate, 10, 45
22	Scrutinising the relationship between plage areas and sunspot areas and numbers Chatzistergos, Theodosios, Ermolli, Ilaria, Krivova, Natalie A., Barata, Teresa, Carvalho, Sara & Malherbe, Jean-Marie, 2022, A&A, 667, A167
14	Understanding the secular variability of solar irradiance: the potential of Ca II K observations Chatzistergos, Theodosios, Krivova, Natalie A. & Ermolli, Ilaria, 2024, Journal of Space Weather and Space Climate, 14, 9
14	Historical solar Ca II K observations at the Rome and Catania observatories Chatzistergos, T., Ermolli, I., Falco, M., Giorgi, F., Guglielmino, S. L., Krivova, N. A., Romano, P. & Solanki, S. K., 2019, Nuovo Cimento C Geophysics Space Physics C, 42, 5
11	Analysis of full-disc Hα observations: Carrington maps and filament properties in 1909-2022 Chatzistergos, Theodosios, Ermolli, Ilaria, Banerjee, Dipankar, Barata, Teresa, Chouinavas, Ioannis, Falco, Mariachiara, Gafeira, Ricardo, Giorgi, Fabrizio, Hanaoka, Yoichiro, Krivova, Natalie A., Korokhin, Viktor V., Lourenço, Ana, Marchenko, Gennady P., Malherbe, Jean-Marie, Peixinho, Nuno, Romano, Paolo & Sakurai, Takashi, 2023, A&A, 680, A15
9	Is there a link between the length of the solar cycle and Earth's temperature? Chatzistergos, Theodosios, 2023, Rendiconti Lincei. Scienze Fisiche e Naturali, 34, 11
9	A Discussion of Implausible Total Solar-Irradiance Variations Since 1700 Chatzistergos, Theodosios, 2024, Solar Physics, 299, 21
2	Assessment of sunspot number cross-calibration approaches Chatzistergos, Theodosios, Krivova, Natalie A., Sundermann, Hannah & Usoskin, Ilya G., 2025, A&A, 699, A157
2	Revisiting the SATIRE-S irradiance reconstruction: Heritage of Mt Wilson magnetograms and Ca II K observations Chatzistergos, Theodosios, Krivova, Natalie A., Solanki, Sami K. & Leng Yeo, Kok, 2025, A&A, 696, A204