| Variable | Definition |
| Ntrig | The number of events triggered on. |
| ST0 | Specific trigger 0. Each event produced a zero if trigger was off, or a one if trigger was on. |
| ST1 | Specific trigger 1. Each event produced a zero if trigger was off, or a one if trigger was on. |
| ST... | Specific trigger .... |
| ST127 | Specific trigger 127. Each event produced a zero if trigger was off, or a one if trigger was on. |