FROM TH2F
constant
0.0350846190079913+-0.01985470226426648
chi2/ndof = 0.016247038794004288
plane
0.0717517957777383+-0.12448838846018971
invpt slope = 0.009512411427961814+-0.012635944297899828
theta slope = -0.05012549825826539+-0.10540594146164999
chi2/ndof = 0.007779042625658229
from tgraph2D
constant
0.049435663780888754+-0.003607838203585776
chi2/ndof = 0.001210534174926871
plane
0.1404575342144774+-0.01325646701625547
invpt slope = 0.0110385370442838+-0.0014065183123626813
theta slope = -0.10937214549669344+-0.011443028066144861
chi2/ndof = 0.00047047313774890414