A refined analysis of the low-mass eclipsing binary system T-Cyg1-12664 Ramón Iglesias-Marzoa, Mercedes López-Morales, María J. Arévalo, Jeffrey L. Coughlin and Carlos Lázaro A&A, 600 (2017) A55 Published online: 29 March 2017 DOI: 10.1051/0004-6361/201527902