FROM TH2F
constant
0.02145549371853859+-0.016275215458840205
chi2/ndof = 0.011619985094595596
plane
0.06129055020559451+-0.09297566983509432
invpt slope = 0.007574522324463102+-0.013740505605234165
theta slope = -0.04245742507064323+-0.07743070628446781
chi2/ndof = 0.005045300901664427
from tgraph2D
constant
0.03034575809734779+-0.0022001388862541225
chi2/ndof = 0.00043081438958993617
plane
0.07838383757832493+-0.006032745496519869
invpt slope = 0.010365909105028048+-0.001088837036788026
theta slope = -0.058647203672332476+-0.005410546972388193
chi2/ndof = 0.00014725096808259673