Evidence for stellar contamination in the transmission spectra of HAT-P-12b C. Jiang, G. Chen, E. Pallé, F. Murgas, H. Parviainen, F. Yan and Y. Ma A&A, 656 (2021) A114 Published online: 09 December 2021 DOI: 10.1051/0004-6361/202141824