The GASMAT materials are contained in two zip files:
gasmat_spectra.zip (1.3 MB) - containing folders for each of the six situations. Each folder contains a scenario description in pdf format and the necessary spectra for each situation.
calibration_spectrum.zip (188.5 KB) - containing the ncessary files and description for the energy/shape calibration plus a Technical Details file which should be studied before attempting the materials. file
A read_me.pdf (179.1 KB) file provides extra information that should be read first.