15:30UTC I arrived on site.
15:35 I heard Verbal Alarms shouting about GRB Short - E365598 Tig Dur .016 and acknowledged
- The earliest I could scroll back to was 13:21UTC
- I called LLO and spoke to Doug Lormand who told me that Mike Fyffe tried to contact/confirm the alert during his shift
- He confirmed that the event took place at 12:31 (Also confirmed on GraceDB page)
- I don't see any indication in the INJ_TRANS log at the time of the event that it reverted to INJECT_KILL.
- As I understand, this is also inconsequential as injections don't occur unannounced which begs the question, why do we physically have to effect a "standown" with regards to changing the state of this node??
Anyway, those are my observations from this morning and food for thought regarding our current trial.
Injections could come unannounced, so we need to be prepared for that.
INJ_TRANS will not go to INJECT_KILL when an external alert comes in, but it will automatically go to EXTTRIG_ALERT_ACTIVE as is shown in your screenshot of the log. This will do basically the same thing as INJ_KILL and will stay in that state for an hour. We manually take this node to INJ_KILL on GRBs for redundancy, making sure that there is no chance of an injection happening at that time.
The stand down time also is for site operations. We need to limit any activity on site, and make sure that maintenance and commissioning activities are delayed until after the stand down.
(I should change Verbal to handle the trial better).