Citation:
dos Santos L A, Ehrenreich D, Bourrier V, Lecavelier des Etangs A, López-Morales M, Sing D K, Ballester G, Ben-Jaffel L, Buchhave L A, arc\'ıa Muñoz A, et al. The Hubble PanCET program: an extensive search for metallic ions in the exosphere of GJ 436 b. \aap. 2019;629 :A47.