FROM TH2F
constant
0.026125951192036416+-0.018185385421579412
chi2/ndof = 0.0018891956938262438
plane
0.017910089850877244+-0.04430956340009906
invpt slope = 0.007295991992181095+-0.025037802054879408
theta slope = 0.0006174016516299601+-0.05271511471458118
chi2/ndof = 0.0008045121575745271
from tgraph2D
constant
0.026145932983485404+-0.0007727656175314511
chi2/ndof = 5.732800316473908e-05
plane
0.017239437092587948+-0.0008287481599628403
invpt slope = 0.007917782695105086+-0.0004692685641221689
theta slope = 0.001717939001626134+-0.001050505146258433
chi2/ndof = 1.3941848297916989e-05