gauss(1)+gauss(2)
 idx  param        tie-to  freeze         value         min         max
  1  gauss(1).area     0     1                1           0           2  photons/s/cm^2
#=>  gauss(2).area - 10
  2  gauss(1).center   0     0               12           0           0  A
  3  gauss(1).sigma    0     0            0.025       1e-06           1  A
  4  gauss(2).area     0     0               11           0           0  photons/s/cm^2
  5  gauss(2).center   0     0               12           0           0  A
  6  gauss(2).sigma    0     0            0.025       1e-06           1  A