FROM TH2F
constant
18.433092944170227+-0.3005965713738951
chi2/ndof = 13.805410211067345
plane
54.444826748981114+-1.1228033037574372
invpt slope = -3.6242246604336574+-0.14580761406442277
theta slope = -28.9765986416271+-0.9274947210555504
chi2/ndof = 8.384611384397036
from tgraph2D
constant
36.931556366802255+-2.243172053696724
chi2/ndof = 1117.064227830075
plane
89.61549867635391+-4.222523440475655
invpt slope = -5.7088299646442096+-0.7519419621675133
theta slope = -56.055074283584574+-4.674526404999412
chi2/ndof = 609.4210487997128