============ Contributors ============ Here I would say thank you to all the users of ``irfpy.aspera``. In particular, I sincerely acknowledge to significant contributions from Moa Persson (IRF) for using ``irfpy.aspera`` for daily research of her PhD project together with providing a sample code, bug reports, and testing the step-by-step tutorial. Xiao-Dong Wang (IRF) for outlining the step-by-step tutorial, testing it, and holding the first data workshop as a lecturer. Diana Rojas Castillo (IRF) for testing and commenting to the step-by-step tutorial. Gabriella Stenberg Wieser (IRF) for providing information and Matlab codes regarding geometric factor of VEX/IMA.