The 2-nd attached file is raw data that you need. The colums there are:
electron peak position in the normalized energy deposition spectrum and
error on it, the peak width (resolution) and its error, run number, SHMS
momentum setting, and experiment.

The curve from simulation on the plot is

TF1* sim_res = new TF1("sim_res",
                          "TMath::Sqrt(5.04*5.04/x+1.71*1.71+2.46*2.46/x/x)",
                          2.,11.);