bit 0   CMU Low Pt Stub
bit 1   CMU Low Pt Stub + CMU Low Pt Track
bit 2   CMU High Pt Stub
bit 3   CMU High Pt Stub + CMU High Pt Track
bit 4   CMU Low Pt Track
bit 5   CMU High Pt Track
bit 6   2 * (CMU Low Pt Stub + CMU Low Pt Track)
bit 7   CMU High Pt Stub + CMU High Pt Track + CMP/CSP Stub
bit 8   CMX Low Pt Stub
bit 9   CMX Low Pt Stub + CMX Low Pt Track
bit 10  CMX High Pt Stub
bit 11  CMX High Pt Stub + CMX High Pt Track
bit 12  CMX High Pt Stub + CMX High Pt Track + CSX Stub
bit 13  BMU Low Pt Stub
bit 14  BMU Low Pt Stub + BMU Low Pt Track
bit 15  BMU High Pt Stub + BMU High Pt Track
bit 16  BMU High Pt Stub + BMU High Pt Track + BSU Stub
bit 17  2 * (CMU Low Pt Stub)  [dphi > 120]
bit 18  2 * (CMU Low Pt Stub + CMU Low Pt Track)  [dphi > 120]
bit 19  Bunch Zero