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This might have something to do with the run database not having been initialized for 2016 at the time of pass0.  Maybe Jeremy remembers how this works?


On Jan 12, 2017, at 11:25, Sebouh Paul <[log in to unmask]> wrote:

In the 2015 runs, the timestamp of an event  (event.getTimeStamp() in java, or event_time in the DST) was the number of ns since the epoch, which is a useful quantity for my time dependent ecal gain corrections.  In the 2016 data, however, the starting point was changed to something like 20-something seconds or 4000-something seconds before the beginning of the run.  

1)  how do i get the number of ns from the epoch in Java?  
2)  why was this change made?  Should we fix this in the next reconstruction pass? 

thanks.  


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