FROM TH2F
constant
0.030531616727342108+-0.014983230011500951
chi2/ndof = 0.042409185898033504
plane
0.13469568660553338+-0.08029958273984183
invpt slope = 0.015351289987059353+-0.009451793359190375
theta slope = -0.11464077072147483+-0.06598037501393601
chi2/ndof = 0.009200320138145774
from tgraph2D
constant
0.06883902754521286+-0.0036991319633684033
chi2/ndof = 0.0019704351288083997
plane
0.11040552283825632+-0.009183978954407356
invpt slope = 0.017701993273382746+-0.0008446405821312101
theta slope = -0.09170845688565503+-0.008860896853306597
chi2/ndof = 0.0004753875916854514