FROM TH2F
constant
0.02062957374115824+-0.015488020038738242
chi2/ndof = 0.014647945930967745
plane
0.06923144640956469+-0.08521118591971458
invpt slope = 0.006373644284777616+-0.011742282914003851
theta slope = -0.04956392105897484+-0.07327874442775144
chi2/ndof = 0.008200928836100567
from tgraph2D
constant
0.032497460345406355+-0.0019105447257125637
chi2/ndof = 0.0003431170279813226
plane
0.061388431775724374+-0.006191962504904884
invpt slope = 0.008327378547326347+-0.0008322550916620928
theta slope = -0.04011117291010169+-0.005591449773407799
chi2/ndof = 0.0001496727677749527