FROM TH2F
constant
5.860120260129264+-0.2795262717393803
chi2/ndof = 0.14443906723044017
plane
5.201850397138269+-0.6541767818018281
invpt slope = -0.42037210858734425+-0.3901843528511742
theta slope = 1.8585500498151486+-0.7847597847655464
chi2/ndof = 0.06729879843766087
from tgraph2D
constant
5.984534341313529+-0.07395499113896623
chi2/ndof = 0.5031793466325208
plane
5.305223878847691+-0.10332526461633405
invpt slope = -0.2254341440563452+-0.06204129694926379
theta slope = 1.4280762947766503+-0.13769089768872037
chi2/ndof = 0.23234012429832346