FROM TH2F
constant
53.79858200074797+-0.8830003372937945
chi2/ndof = 49.010888227123495
plane
69.41524693385475+-4.6289957482894275
invpt slope = 4.265579001431813+-0.6532166421321055
theta slope = -20.00813009488016+-3.772766858813568
chi2/ndof = 49.52296021918128
from tgraph2D
constant
103.0724676156143+-6.051263186275354
chi2/ndof = 2709.7161787462614
plane
92.33078137590626+-33.9915446697844
invpt slope = -2.4251264019188516+-4.630096677844614
theta slope = 13.027555755597295+-28.884764514083418
chi2/ndof = 2770.526755874973