FROM TH2F
constant
0.026357777636990407+-0.02113627198961945
chi2/ndof = 0.015044740040634512
plane
0.0373539106234466+-0.10808481167319225
invpt slope = 0.02033194122495503+-0.025537232551321506
theta slope = -0.027752008770713724+-0.09784820732813672
chi2/ndof = 0.0034915126849861164
from tgraph2D
constant
0.03682058048534435+-0.0029609654720989154
chi2/ndof = 0.0005874102072791506
plane
0.0418752024222844+-0.007141552406125401
invpt slope = 0.0214221276065546+-0.0016314571985640315
theta slope = -0.03057205588688287+-0.006822970856799587
chi2/ndof = 0.00016186823530404306