FROM TH2F
constant
0.3263808144379212+-0.03750751729972092
chi2/ndof = 0.8568545718917214
plane
-0.10273789110440783+-0.10864626049473404
invpt slope = -0.007048450514122709+-0.014393571706995198
theta slope = 0.6817257934684781+-0.09829590070699126
chi2/ndof = 0.6505133773241641
from tgraph2D
constant
1.5169529387917775+-0.14539684635434652
chi2/ndof = 5.559883901767262
plane
-1.4618914638813791+-0.45341120341122604
invpt slope = 0.32607088066233786+-0.04056583658453489
theta slope = 1.3787397086015396+-0.3867650648938412
chi2/ndof = 4.311085880836118