FROM TH2F
constant
27.485476011827775+-0.6768243991764579
chi2/ndof = 49.05593620129218
plane
30.922361134765257+-4.092377423575692
invpt slope = -16.700575183665986+-0.7431761387635738
theta slope = 32.898993144457584+-3.832103921947106
chi2/ndof = 39.41240536624443
from tgraph2D
constant
79.86647490385845+-5.898542843210614
chi2/ndof = 2331.1181126624383
plane
109.58613088642338+-28.975151203640483
invpt slope = -10.991341213297549+-6.377021082581829
theta slope = -15.603671280300475+-26.060155634742845
chi2/ndof = 2294.3199218414547