FROM TH2F
constant
12.898414108723737+-0.567855925839574
chi2/ndof = 65.22140325124809
plane
-5.699646408182154+-5.085371345567659
invpt slope = -22.728802715888516+-0.7655644919334742
theta slope = 69.54327019378478+-4.536296823873419
chi2/ndof = 40.70396711156741
from tgraph2D
constant
84.27923470750979+-7.506489569843037
chi2/ndof = 2479.284968757947
plane
68.94637879923611+-52.32817416910871
invpt slope = -29.728797169382755+-6.6480456623057185
theta slope = 49.030252434996164+-43.13795913460264
chi2/ndof = 1648.7924829790604