FROM TH2F
constant
0.01742565956119539+-0.017799723977421345
chi2/ndof = 0.010587867168463064
plane
0.061451724522641665+-0.10959864054367684
invpt slope = 0.008324034663824476+-0.020429720115828023
theta slope = -0.04597777639087199+-0.09124580505751703
chi2/ndof = 0.0025923894189576325
from tgraph2D
constant
0.025399911473685893+-0.0022176303547756823
chi2/ndof = 0.000299990947815157
plane
0.07489154994410026+-0.004934253833162654
invpt slope = 0.009585076683930185+-0.0010974895989448823
theta slope = -0.058614257426203006+-0.004392017711263855
chi2/ndof = 5.786388333072734e-05