FROM TH2F
constant
0.027947299301734813+-0.02579557884952933
chi2/ndof = 0.0031637006193517957
plane
0.012370945618520332+-0.23552551926757004
invpt slope = 0.00615669242775998+-0.023335375699442086
theta slope = 0.005276403760511999+-0.22183491434629676
chi2/ndof = 0.0011041649712536562
from tgraph2D
constant
0.029335623523692348+-0.0013501546367638958
chi2/ndof = 8.56771245291793e-05
plane
0.024969176961971963+-0.007191897796105571
invpt slope = 0.006051844057266636+-0.000617449201571834
theta slope = -0.005202219927272042+-0.006617296178432855
chi2/ndof = 2.7224421167689695e-05