NuSTAR CALDB Release Version: 20190314 Release Type: Clock Correction Update Summary of changes: CLOCK: An updated NuSTAR clock correction file, version 91, is available. This file is up to date through 2019-03-14 0915 UTC (DOY 073), compared to 2019-02-28 in the previous version (90). http://www.srl.caltech.edu/NuSTAR_Public/NuSTAROperationSite/clockfile.php A spline fit covers the period of the update and the residuals remain within +/- 2 ms.