FROM TH2F
constant
0.02308794700248903+-0.02402495941821809
chi2/ndof = 0.0024133952412275575
plane
-0.026803801079769537+-0.26654205546324455
invpt slope = 0.004245411348846895+-0.019660905807017976
theta slope = 0.03559607829550078+-0.22056687948914336
chi2/ndof = 0.000622850051040565
from tgraph2D
constant
0.02452837808165025+-0.0011552751292078969
chi2/ndof = 5.872506746345085e-05
plane
-0.026623186118081257+-0.006365046468128048
invpt slope = 0.004316878243512212+-0.00039565664279923293
theta slope = 0.035739862301204094+-0.005189728843285285
chi2/ndof = 1.2862898568731141e-05