FROM TH2F
constant
0.018342842830073706+-0.020898190182274977
chi2/ndof = 0.009209667679025604
plane
0.09261907452744508+-0.17049579703403037
invpt slope = 0.004337112277484742+-0.026202990125523403
theta slope = -0.06722977946422232+-0.13460124059011214
chi2/ndof = 0.0014850439279878054
from tgraph2D
constant
0.025716744947474467+-0.0019101571254369913
chi2/ndof = 0.00017148891146116015
plane
0.08340248897680619+-0.005969405836134587
invpt slope = 0.006137551916996166+-0.0008169638183412552
theta slope = -0.059978264014595724+-0.005092257396462838
chi2/ndof = 2.7377368994158134e-05