#bias(V)  dum        bias_lvl(1/8mV) dum    photopeak_lvl (1/8mV)
28.5    -6.58286     0.67669    -3.56571     0.54135
29.0    -0.77844     1.81000    -0.45377     1.44500
29.5    -0.77585     1.81047    -0.44832     1.17706
30.0    -0.75323     4.73750    -0.46629     3.66250
30.5    -0.76467     4.73684    -0.45436     3.22055
31.0    -0.75231     9.60000    -0.44149     7.62500
31.5    -0.74857     9.59900    -0.41714     7.16792
32.0    -0.77044     9.60000    -0.39733     6.65000
32.5    -0.75429     9.60000    -0.39429     6.20000
33.0    -0.74286    19.40000    -0.40571    15.60000
33.5    -0.72094    19.35000    -0.40229    14.65000
34.0    -0.74286    19.34837    -0.37714    14.08521