FROM TH2F
constant
0.033518825914294476+-0.013212767251715482
chi2/ndof = 0.03813068940543389
plane
0.039918453972013136+-0.03405069016720647
invpt slope = 0.00016345178492643267+-0.005705900740942506
theta slope = -0.010228689490673747+-0.04608130756472905
chi2/ndof = 0.03826575371701986
from tgraph2D
constant
0.06706351605504558+-0.0033066524635798093
chi2/ndof = 0.0022851956568885087
plane
0.006777321498693624+-0.004162480913073597
invpt slope = 0.01794209078472658+-0.000778874886120407
theta slope = 0.010537700454755498+-0.005313720752940983
chi2/ndof = 0.0006183833777630861