FROM TH2F
constant
0.024087768640210453+-0.01673589954325531
chi2/ndof = 0.055264254116481094
plane
0.01903573440190458+-0.0356430577434324
invpt slope = 0.03278348021950778+-0.021932126675797095
theta slope = -0.04550635499466325+-0.05771799644365499
chi2/ndof = 0.029597506049379368
from tgraph2D
constant
0.06847180986049124+-0.0060964149582414815
chi2/ndof = 0.0037166275346295474
plane
0.0021019127480491418+-0.006978991785095004
invpt slope = 0.032941978445760675+-0.003257095282396472
theta slope = 0.020132908588407265+-0.012480000549005223
chi2/ndof = 0.0011858845142976204