FROM TH2F
constant
0.013352947562454606+-0.020115535652370144
chi2/ndof = 0.005500290020163954
plane
-0.0273131866830515+-0.12783894979865737
invpt slope = 0.002919884627276256+-0.027810366401172133
theta slope = 0.03397558903142399+-0.10380041326490591
chi2/ndof = 0.0022320919442699785
from tgraph2D
constant
0.01795088603059194+-0.0012286461576546254
chi2/ndof = 5.43445697059727e-05
plane
-0.01683805432277048+-0.008478726961808035
invpt slope = 0.0044979063412891596+-0.0011139877975918596
theta slope = 0.02414374466713211+-0.0066477569336850385
chi2/ndof = 3.444840784801018e-05