FROM TH2F
constant
0.0385281873158883+-0.0188876275645934
chi2/ndof = 0.024556283383435552
plane
0.03758144013934248+-0.11464092639268951
invpt slope = 0.0077937539211291+-0.009293119327656281
theta slope = -0.01797709228014452+-0.10344299714737254
chi2/ndof = 0.017895584746616452
from tgraph2D
constant
0.06027974211997925+-0.0032767847988424826
chi2/ndof = 0.001213317003940669
plane
0.11836544626140526+-0.011414388619354223
invpt slope = 0.01270223952495312+-0.0008987456725727317
theta slope = -0.09544652773870871+-0.010860471731580487
chi2/ndof = 0.00038098975459679985