petitRADTRANS - A Python radiative transfer package for exoplanet characterization and retrieval P. Mollière, J. P. Wardenier, R. van Boekel, Th. Henning, K. Molaverdikhani and I. A. G. Snellen A&A, 627 (2019) A67 Published online: 02 July 2019 DOI: 10.1051/0004-6361/201935470