FROM TH2F
constant
0.025238009806494245+-0.01557797071186471
chi2/ndof = 0.020363512228710655
plane
0.08035529719479631+-0.09557514773888123
invpt slope = 0.0078996323958669+-0.009552348135139974
theta slope = -0.059439257769509105+-0.07858465110406215
chi2/ndof = 0.007981004369883436
from tgraph2D
constant
0.04301769299992246+-0.0031407229116137353
chi2/ndof = 0.0010850554445199214
plane
0.1151400550004626+-0.010018703919509405
invpt slope = 0.011425378611821357+-0.0011855073961441855
theta slope = -0.09368478341361595+-0.009124109535244052
chi2/ndof = 0.00042596533371049255