Muons(BC-Stub)

 These are the same plots as MUONS(ALL) except for BC-stubs. BC-stubs have 
 no A-layer hits.

 N
 -----
 The number of BC stub muons of all kinds. 

 PT
 -----
 The pT (GeV/c) of BC-stub muons.  This comes from the tracker if the muon is matched.
 A pT can be calculated from the BC track and the hypothetical track from the 
 vertex to the projection of the BC track into the toroid.

 ETA
 -----
 Eta of BC-stub muons. 

 PHI
 -----
 Phi of BC-stub muons. I expect them to be uniformly distributed in phi except
 for octants 5 & 6, which should have more because of the A-layer hole in
 the central.

 CHISQ
 -----
 The chi-sq of the track fit. I don't know why this is always zero.

 CHISQLOC
 --------
 The chi-sq of the fit for the muon local track (muon hits only).

 E33
 -----
 The energy deposited in a 3x3 cone in the calorimeter (corresponding to
 delta eta x delta phi of 0.3 x 0.3) centered around the expected position
 the muon enters it.  Muons deposit between 1 and  2.5+ GeV in the 
 calorimeter depending on the angle it goes through. 

 HALO
 -----
 The energy in a ring of inner radius xxx and ounter radius yyy.
 This helps determine muon isolation.

 W HITS A
 --------
 BC stubs have no A-layer hits.

 
 W HITS BC
 ---------
 The number of BC wire hits on the segment.

 SCINT HITS A
 ------------
 BC stubs have no A-layer hits.

 SCINT HITS BC
 -------------
 The number of BC scintillator hits on the segment.