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Analysis of full disc Ca II K spectroheliograms - I. Photometric calibration and centre-to-limb variation compensation

Theodosios Chatzistergos, Ilaria Ermolli, Sami K. Solanki and Natalie A. Krivova

A&A, 609 (2018) A92

DOI: https://doi.org/10.1051/0004-6361/201731511

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