The corona – chromosphere connection studied with simultaneous eROSITA and TIGRE observations B. Fuhrmeister, S. Czesla, J. Robrade, J. N. González-Pérez, C. Schneider, M. Mittag and J. H. M. M. Schmitt A&A, 661 (2022) A24 Published online: 18 May 2022 DOI: 10.1051/0004-6361/202141020