FROM TH2F
constant
0.01691990260857633+-0.017539515183355645
chi2/ndof = 0.005155213058441122
plane
0.04730249727595494+-0.10778272843135854
invpt slope = 0.005659291719799019+-0.01917232881184961
theta slope = -0.03288955734111837+-0.08937671957143693
chi2/ndof = 0.0009143787036881593
from tgraph2D
constant
0.020602230364382374+-0.0012536183333599028
chi2/ndof = 9.429353554368953e-05
plane
0.04714753471934683+-0.0028667732821230953
invpt slope = 0.006170760283941783+-0.0005382060622539543
theta slope = -0.03284446780011188+-0.0025147928849300577
chi2/ndof = 1.6008088861660668e-05