FROM TH2F
constant
0.017936043075458735+-0.017289709405670026
chi2/ndof = 0.0036544002903526294
plane
0.0051760190837296305+-0.041333974660615946
invpt slope = 0.014293407551307764+-0.03146070776970068
theta slope = 0.00351123949171686+-0.05319232683136073
chi2/ndof = 8.951352122648544e-05
from tgraph2D
constant
0.018321852526151965+-0.001125919721729391
chi2/ndof = 9.634483670336212e-05
plane
0.005302419734821348+-0.00037860758644079175
invpt slope = 0.013921261256842652+-0.00026242257380122426
theta slope = 0.004107292610648206+-0.0005190471085851688
chi2/ndof = 2.4041649928984384e-06