This work has received funding from EPSRC [Grant Number EP/R034737/1]. This work was supported by the U.S. Department of Energy under contract number DE-AC02-09CH11466. The United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The author acknowledges the use of the EUROfusion High Performance Computer (Marconi-Fusion) under projects OXGK and MULTISCA. This work made use of computational support by CoSeC, the Computational Science Centre for Research Communities, through CCP Plasma (EP/M022463/1) and HEC Plasma (EP/R029148/1).

Supplementary data for the Plasma Physics and Controlled Fusion Publication `New linear stability parameter to describe low-β electromagnetic microinstabilities driven by passing electrons in axisymmetric toroidal geometry, M. R. Hardman, F. I. Parra, B. S. Patel, C. M. Roach, J. Ruiz Ruiz, M. Barnes, D. Dickinson, W. Dorland, J. F. Parisi, D. St-Onge, and H. Wilson'. The publication appears as an arXiv preprint with identifier arXiv:2208.10615. The dataset consists of GS2 input files for the study, and a python (3) script for generating a selection of the figures from raw GS2 output data. Details are given in the Readme.