FROM TH2F
constant
0.030882689547409522+-0.019526079278257107
chi2/ndof = 0.05293295214899648
plane
0.0028455170430921432+-0.039278582261579556
invpt slope = 0.0387644522747102+-0.024323304376015684
theta slope = -0.008411408981884185+-0.07092811693000245
chi2/ndof = 0.015969085637215635
from tgraph2D
constant
0.07168036343210879+-0.00694095474837944
chi2/ndof = 0.004576801017558867
plane
0.0006696959452542242+-0.007476655428023801
invpt slope = 0.041724771135868914+-0.0036986846925168484
theta slope = 0.010478003609486357+-0.013464303782430274
chi2/ndof = 0.0013383043823855273