FROM TH2F
constant
0.01806533685287978+-0.028025870698254254
chi2/ndof = 0.002458116331621135
plane
0.0387947832568353+-0.20985147420116035
invpt slope = 0.006293096119415156+-0.04461935639512614
theta slope = -0.022867782501587497+-0.1630204613331971
chi2/ndof = 0.000380938161884147
from tgraph2D
constant
0.01933670059356457+-0.0014529185782601079
chi2/ndof = 5.488528227135829e-05
plane
0.03932444115885535+-0.003371105417841346
invpt slope = 0.005836156460668484+-0.0007059806573029516
theta slope = -0.022420538354372344+-0.002656052294557518
chi2/ndof = 6.854795280465864e-06