FROM TH2F
constant
31.022641978996987+-0.5937423875971901
chi2/ndof = 28.636529028940014
plane
22.22339365742759+-2.975128621935431
invpt slope = -6.144218541970632+-0.41100427617528384
theta slope = 25.60480183062752+-2.6779723180692194
chi2/ndof = 25.728531373807662
from tgraph2D
constant
57.48800246565986+-3.8553317351645804
chi2/ndof = 1382.3131994692499
plane
67.22581646736892+-19.50214588933618
invpt slope = 5.585949142142295+-2.7358050893818784
theta slope = -21.07777127873672+-17.28659962738751
chi2/ndof = 1332.0084675689786