FROM TH2F
constant
10.742504091933881+-0.31685522614758876
chi2/ndof = 16.761006796254886
plane
62.94599661426044+-2.2475709788762104
invpt slope = -2.462895811515565+-0.17885014522373832
theta slope = -37.89123619656274+-1.6739530130275122
chi2/ndof = 11.789530171069957
from tgraph2D
constant
28.010128532797957+-2.5996533091015737
chi2/ndof = 770.4344907023022
plane
118.2930755474141+-11.670741154592392
invpt slope = -5.842052100930044+-1.1080983879391835
theta slope = -70.51771511809106+-10.541640418033571
chi2/ndof = 473.7089733631793