FROM TH2F
constant
0.035423051576412665+-0.021042531807754783
chi2/ndof = 0.0055412039101617
plane
0.01936032639457162+-0.05244673546514232
invpt slope = 0.008358074812253325+-0.0332487242263342
theta slope = 0.01175562911303656+-0.05321031795388901
chi2/ndof = 0.004220522475404785
from tgraph2D
constant
0.03872060131639307+-0.0016079796175419347
chi2/ndof = 0.0002559742465796103
plane
0.0187114559494619+-0.002470081392637589
invpt slope = 0.01248784340334722+-0.0015308076093003256
theta slope = 0.013520255365356818+-0.0027707229150850383
chi2/ndof = 0.00012842847474603313