This repository contains some of the simulation data presented in the recent article in plasma physics titled "Strong collisionless coupling between an unmagnetized driver plasma and a magnetized background plasma" (https://arxiv.org/abs/2302.00149). The data available are for 1D particle-in-cell (PIC) simulations that consider the interaction between a uniform unmagnetized driver plasma flowing against a uniform magnetized background plasma, for multiple values of the driver density and background magnetic field. The simulations were performed with OSIRIS, a massively parallel and fully-relativistic, PIC code. Using the data from the simulations, we studied the coupling between the plasmas and determined the compression ratio and the velocities of the magnetic cavity and magnetic compression that were visible in the simulations. More information on the simulations and on the obtained results are presented in the article. The datasets contain the main data of some of the simulations presented in the paper (.h5 files), the coupling parameters measured in the simulations (coupling_data.csv), and a Jupyter Notebook file to look at the simulation results from the available datasets (read_dataset.ipynb).