Release 20161207

Summary of changes: 

CLOCK:

An updated NuSTAR clock correction file, version 66, is available. This file is up to date through 2016-12-07, compared to 2016-10-21 in the previous version (63).  This version is  the long awaited 'corrected' clock correction file that tracks clock drift by fitting to screened clock data. The input data values are much cleaner and no longer have many un-physical out of family measurements. As a result, the clock correction spline is much smoother and is a significantly improved measure of the on-orbit clock drift.

The versions of the clock correction file from v022 to v063 should not be used and I have removed them from the SOC website (though they will remain in historical versions of the CALDB). I will be contacting PIÕs of observations that may have been effected by the use of the old clock correction files and will provide information to be presented on the NuSTAR HEASARC website in the CALDB and analysis pages.

The clock file is available from the SOC public website:

http://www.srl.caltech.edu/NuSTAR_Public/NuSTAROperationSite/clockfile.php