PEPSI deep spectra - III. Chemical analysis of the ancient planet-host star Kepler−444 C. E. Mack III, K. G. Strassmeier, I. Ilyin, S. C. Schuler, F. Spada and S. A. Barnes A&A, 612 (2018) A46 Published online: 20 April 2018 DOI: 10.1051/0004-6361/201731634