FROM TH2F
constant
0.04977219775232286+-0.026292214138285933
chi2/ndof = 0.01119507124190349
plane
0.04318051710190221+-0.17581682725208633
invpt slope = 0.014125341239329457+-0.02058844320954806
theta slope = -0.014944552264590343+-0.1436322062561983
chi2/ndof = 0.0046320220747206355
from tgraph2D
constant
0.058921459656715726+-0.0028916901839106447
chi2/ndof = 0.0006522260253790398
plane
0.05577178153833+-0.012806033987709966
invpt slope = 0.014140486091013102+-0.001254792388017649
theta slope = -0.021178149186941022+-0.010505634516047913
chi2/ndof = 0.00024577911032517093