FROM TH2F
constant
0.003729399056391163+-0.009004104203585004
chi2/ndof = 0.016369423724902004
plane
0.03217905901201918+-0.20223105912769174
invpt slope = -0.0040237762872305585+-0.0050518384675256765
theta slope = -0.0031435202101560925+-0.1516160306249204
chi2/ndof = 0.002376567604936565
from tgraph2D
constant
0.020209223402489904+-0.0010225771452103075
chi2/ndof = 5.2283200895211213e-05
plane
0.031312953663155375+-0.010781528617579039
invpt slope = -0.002558805872071907+-0.00038914707997843236
theta slope = -0.0037929491430808335+-0.00816364937121495
chi2/ndof = 2.8408805799177082e-05