FROM TH2F
constant
0.01771840740385463+-0.017948617273714645
chi2/ndof = 0.014527450942921773
plane
0.10207491639948237+-0.15231289978762041
invpt slope = -0.0036786758671102622+-0.013471146735652383
theta slope = -0.06419662471541265+-0.12789394755331088
chi2/ndof = 0.008180638856594964
from tgraph2D
constant
0.030316483166115654+-0.0023129297900862295
chi2/ndof = 0.00032097865283937384
plane
0.10126424074754578+-0.009061435315905557
invpt slope = 0.005118830523802125+-0.0012601060329882445
theta slope = -0.07144192520194877+-0.007650553900439139
chi2/ndof = 0.00011212416050414396