FROM TH2F
constant
0.030852622967635048+-0.02145895873576784
chi2/ndof = 0.006924299054205109
plane
0.01149036174917081+-0.0497271997054908
invpt slope = 0.019380627331878196+-0.03604604044821574
theta slope = 0.00620732475492979+-0.060482671409377076
chi2/ndof = 0.002352950642191654
from tgraph2D
constant
0.03448354065735021+-0.0025167566993857253
chi2/ndof = 0.0005320613998176919
plane
0.01860218787106642+-0.0039064370533088465
invpt slope = 0.022575964541257966+-0.0026280924557377247
theta slope = -0.004253760214311457+-0.004976239686153562
chi2/ndof = 0.0002852913748362227