FROM TH2F
constant
0.013568682022360095+-0.013274661938773505
chi2/ndof = 0.007984508698195652
plane
0.049790271719267254+-0.1277860424174046
invpt slope = 0.0037709948197226515+-0.007067330861040406
theta slope = -0.035821027934183666+-0.09924515183923537
chi2/ndof = 0.0030369647107852025
from tgraph2D
constant
0.020389162261526237+-0.0015362145829196268
chi2/ndof = 0.00019351633007647683
plane
0.044282322046219874+-0.009842864589221905
invpt slope = 0.004840685186063179+-0.0004233899611103845
theta slope = -0.03201136579518859+-0.007811315096234143
chi2/ndof = 6.971863283434484e-05