FROM TH2F
constant
0.025167261269729204+-0.02447898091233302
chi2/ndof = 0.010503076394540614
plane
0.10652647001451616+-0.18348458181234786
invpt slope = 0.00396332557536536+-0.03348333495916588
theta slope = -0.07491334535823913+-0.14091586912948398
chi2/ndof = 0.0015753234138484058
from tgraph2D
constant
0.03383291845738379+-0.0030421795195142236
chi2/ndof = 0.00041646853031715485
plane
0.11729356058840386+-0.0057218740415814805
invpt slope = 0.003132815251005782+-0.001221212406053793
theta slope = -0.08256733814971168+-0.004607761381610221
chi2/ndof = 4.364275882298568e-05