FROM TH2F
constant
0.048638936449803015+-0.019805289353708875
chi2/ndof = 0.02035255268865477
plane
0.1042136245964056+-0.12572183831099867
invpt slope = 0.01328960412017847+-0.010146244116622797
theta slope = -0.07768246183279628+-0.10739663561870307
chi2/ndof = 0.003405200517857541
from tgraph2D
constant
0.06634333512983726+-0.0031092429660227986
chi2/ndof = 0.0012567609366983471
plane
0.1265526086973404+-0.007057505865770154
invpt slope = 0.013946766629329723+-0.0005718691270274083
theta slope = -0.09698076843677036+-0.006362900098238929
chi2/ndof = 0.00019243062457849637