FROM TH2F
constant
0.05959845160519182+-0.017092374686725406
chi2/ndof = 0.016895063673608532
plane
0.030756846512610292+-0.04673356129916736
invpt slope = 0.015713862549383787+-0.00967923400576363
theta slope = -0.011817019375976578+-0.04939264219481022
chi2/ndof = 0.0030018627702215637
from tgraph2D
constant
0.07472735753238928+-0.0026538005866061586
chi2/ndof = 0.0015634699760334284
plane
0.04360244584292373+-0.002931041272087854
invpt slope = 0.01536272391303207+-0.0005219563569524099
theta slope = -0.02198910019831896+-0.0032447966489562944
chi2/ndof = 0.00029364133681105743