FROM TH2F
constant
27.400744812901376+-0.7329867022392812
chi2/ndof = 16.16222550338505
plane
14.028193433219549+-1.7844860360285
invpt slope = 16.959775471040796+-1.3855520801139234
theta slope = -2.7629568440949632+-2.4776814497742583
chi2/ndof = 13.712538089583717
from tgraph2D
constant
38.32720049411185+-3.574936246563915
chi2/ndof = 830.7109966915756
plane
1.3983405376275408+-4.873269452371116
invpt slope = 23.827748804291282+-3.348156370191392
theta slope = 39.91860999373315+-8.218949595688729
chi2/ndof = 364.3805482634621