arXiv Journal of Instrumentation, 15 (6 JOURNAL OF INSTRUMENTATION Journal of Instrumentation 15(06), P06032 (2020). doi:10.1088/1748-0221/15/06/P06032 Aartsen, M G, Ackermann, M, Admas, J, Aguilar, J A, Ahlers, M T, Ahrens, M, Alispach, C, Andeen, K, Anderson, T, Ansseau, I, Medici, M A, Koskinen, D J, Rameez, M, Stuttard, T S, Bourbeau, E & Icecube Collaboration 2020, ' In-situ calibration of the single-photoelectron charge response of the IceCube photomultiplier tubes ', Journal of Instrumentation, vol. 15, no. 6, P06032 . https://doi.org/10.1088/1748-0221/15/06/P06032