FROM TH2F
constant
10.827379111740898+-0.38251265869270956
chi2/ndof = 2.7511453749525665
plane
2.175439323758336+-0.9454320234078363
invpt slope = 3.220683230776659+-0.5157165956983231
theta slope = 10.838550620384307+-1.3664078774779127
chi2/ndof = 1.3955146843905473
from tgraph2D
constant
12.8553481650172+-0.8720951695926139
chi2/ndof = 67.68894867187565
plane
2.5280973297218714+-1.476372323484231
invpt slope = 4.157799830629353+-0.7478719750037833
theta slope = 11.43015291559804+-2.1990937949306515
chi2/ndof = 39.85876438598465