FROM TH2F
constant
15.045623121744306+-0.8464385641101144
chi2/ndof = 67.82184604233024
plane
-73.69561856218434+-4.785910282198714
invpt slope = 9.103147776489779+-2.4343562761821413
theta slope = 89.36348701267131+-3.8486299073366688
chi2/ndof = 45.40460613375069
from tgraph2D
constant
80.85791730918842+-11.24279858027276
chi2/ndof = 3033.6124753976587
plane
-141.62891447282465+-55.396052914056234
invpt slope = 24.123713576183533+-12.411938688202728
theta slope = 169.04945547857977+-43.7116324780074
chi2/ndof = 1848.120025636088