FROM TH2F
constant
0.03296664712447714+-0.016506108845873092
chi2/ndof = 0.02019384852949562
plane
0.06180329344603461+-0.10528086342275127
invpt slope = 0.007980035367684634+-0.00783927309701783
theta slope = -0.04325370451068879+-0.08908031335748859
chi2/ndof = 0.009559954030152168
from tgraph2D
constant
0.05067318813301334+-0.002786878547360867
chi2/ndof = 0.0009863698887273053
plane
0.1211903755977877+-0.00876172826484544
invpt slope = 0.009839343906626299+-0.0006449779025563497
theta slope = -0.09562871893941355+-0.007719146714979536
chi2/ndof = 0.0002510365167681859