FROM TH2F
constant
0.005757589320048202+-0.009069248919600911
chi2/ndof = 0.013969913094369587
plane
0.07718800552903557+-0.11409423596933249
invpt slope = 0.0018567292734828994+-0.005681271881154114
theta slope = -0.054852673598722035+-0.08019669754139126
chi2/ndof = 0.004059169629056568
from tgraph2D
constant
0.018703616612552397+-0.0017475241095144438
chi2/ndof = 0.00022598419799280483
plane
0.05284958088470896+-0.015801568232815078
invpt slope = 0.004011251644484709+-0.000623734559432345
theta slope = -0.03797714715165768+-0.01245764630872976
chi2/ndof = 0.0001325984969927723