FROM TH2F
constant
8.59303036510829+-0.4634929982630094
chi2/ndof = 50.33373047684066
plane
-33.0947615174262+-4.747611090317501
invpt slope = -9.920323397819908+-0.46712797277129103
theta slope = 62.265432769644065+-4.285646626020994
chi2/ndof = 38.85785828882952
from tgraph2D
constant
55.2427093211031+-5.830698251628483
chi2/ndof = 1495.869855114525
plane
-16.93814524350551+-68.1842733825535
invpt slope = 5.740997021582415+-4.238391914785327
theta slope = 50.97779929811958+-55.5939210234501
chi2/ndof = 1476.0604611441877