FROM TH2F
constant
18.386621153761023+-0.4855161293781953
chi2/ndof = 82.63291022290869
plane
77.8129765795074+-3.328043627622584
invpt slope = -9.516065440314197+-0.4493595057001304
theta slope = -22.546220640875482+-2.9678440216308166
chi2/ndof = 72.04147366513479
from tgraph2D
constant
100.26728350647886+-5.494022611942234
chi2/ndof = 2535.4798969485205
plane
97.35567576245307+-30.11010201897722
invpt slope = 2.0870882204203656+-4.060778891038486
theta slope = -1.0618322312084238+-26.17389218898801
chi2/ndof = 2589.244813252128