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Hi Sebouh,

Iím out but Sho is looking into this so you should coordinate with him.

One note, Iím not sure you care about beam trips as there will be no events during that time.

What you mostly care about is the SVT bias voltage being on and the opening angle of the detector was ok (not moving for example). The latter is a very small effect as long as you use the later runs when things were more stable. I and Sho have been putting together a way for users to reject those periods. The last thing is burst noise and latency issue but Sho can tell you about those if you want to know how we plan to attack those initially.

/Pelle

On Jul 29, 2015, at 10:56 AM, Sebouh Paul <[log in to unmask]<mailto:[log in to unmask]>> wrote:

Does anyone know where I can get absolute time from an event (ie, is it only in the EVIO and not copied ot the LCIO, or has it already been copied to somewhere in the LCIO?)  Also i think it's misleading that the method "getTimestamp" has in its javadoc description that it's the ms since epoch (1970-01-01 00:00:00), and yet it has some smaller units (i'm guessing nanoseconds since that is consistent with the differences between the timestamps between events N events apart, and the tabulated event rate).

What I want to do is mask out events that took place during the time when beam trips took place (the times of the beam trips I have found by looking at the scalers in Mya, which uses absolute time in ms), and then only use the events that are not during beam trips, and when the SVT is running etc.

thanks

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