FROM TH2F
constant
0.016081128737037678+-0.028355888927304673
chi2/ndof = 0.0038182128837666637
plane
-0.047466100013694425+-0.405340147548421
invpt slope = 0.008862666881161855+-0.04286758528928296
theta slope = 0.04544083252143162+-0.33222533373858376
chi2/ndof = 0.0014924314878926501
from tgraph2D
constant
0.01889543077604458+-0.0014022405002011246
chi2/ndof = 4.3258125248896796e-05
plane
-0.01783967631020624+-0.012685991275854347
invpt slope = 0.006858285753798587+-0.0010827050933003178
theta slope = 0.023645112481951613+-0.010303515437108257
chi2/ndof = 1.5331743622471074e-05