Run XIX trigger T0
I have checked trigger T0 offset for Run XIX Collider samples:
Sample T0 dT ddT freq
{"2019/RF/AuAu200" , 2.3904,-0.0482, 0.0201, 9383180},
{"2019/RF/19GeV" , 2.3675,-0.0023, 0.0106, 9341081},
{"2019/RF/14p5GeV" , 2.3904, 0.0070, 0.0122, 9307123},
{"2019/RF/9p2GeV" , 2.3904, 0.0141, 0.0152, 9188688},
{"2019/RF/7p7GeV" , 2.3904, 0.0362, 0.0144, 9104517}
where T0 trigger time taken from DataBase, dT +/- ddT is the measured difference between z of primary vertices reconstructed using West or East parts of TPC only, respectively, expressed in μs (microseconds).
I do see that triggerT0 (μs) = T0 + dT = (0.1 +/- 0.5) μs + (21.2 +/- 5.4) time buckets (with kind of strange point at 14p5 GeV) i.e. roughly speaking our trigger decision is coming in 21 time buckets from the collision.
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