FROM TH2F
constant
19.46812869323968+-0.5094850827568594
chi2/ndof = 27.451942250649992
plane
86.11483610666401+-4.404838341684918
invpt slope = -5.0128148599344735+-0.25522283528328527
theta slope = -36.41276187168495+-3.553024375148695
chi2/ndof = 20.593262562705416
from tgraph2D
constant
45.21592911366784+-4.6486345022034286
chi2/ndof = 1707.1744182710652
plane
222.24216625969026+-33.94322828764323
invpt slope = -1.0943111839442416+-2.1611119659019455
theta slope = -146.70441564082833+-27.95322202029966
chi2/ndof = 1282.3526039757166