FROM TH2F
constant
8.656587448102297+-0.3118734164389011
chi2/ndof = 22.128750117336
plane
26.37098109508838+-2.017218970165556
invpt slope = -5.8132719631569+-0.217844168940793
theta slope = 7.40554443632433+-1.7340687227497893
chi2/ndof = 14.298692254894647
from tgraph2D
constant
30.96464160369363+-3.105246082508359
chi2/ndof = 906.4000031592542
plane
86.39660255177998+-17.59393362286915
invpt slope = -8.539815840349181+-1.4407506790460467
theta slope = -26.81145415466011+-15.070299880947507
chi2/ndof = 645.7807595759348