FROM TH2F
constant
0.032253673213508145+-0.01728135187260308
chi2/ndof = 0.05918766157832179
plane
-0.0069489613460380194+-0.035490667214547605
invpt slope = 0.03679521241970632+-0.018408202744622917
theta slope = 0.009346388257606083+-0.057088433867898455
chi2/ndof = 0.016968865502453388
from tgraph2D
constant
0.08046292794979518+-0.006228806092895988
chi2/ndof = 0.004772157114202333
plane
-0.008376971800363495+-0.0054623929010483765
invpt slope = 0.04104241322047863+-0.002211758131010012
theta slope = 0.02451192602549456+-0.00877303840573537
chi2/ndof = 0.0008437831590356493