text: # This dependency might be overkill for just reading a few
  # variables. Should be changed at some point.
  import scipy.constants as spc
  
  c = 1e2 * spc.c
  cm2sec = 1e-2 / spc.c
  sec2cm = spc.c * 1e2
  eV = 1e-9
  keV = 1e-6
  MeV = 1e-3
  GeV = 1.
  TeV = 1e3
  PeV = 1e6
  EeV = 1e9
  