NuSTAR CALDB Release Version: 20190513 Release Type: Clock Correction Update Summary of changes: CLOCK: An updated NuSTAR clock correction file, version 93, is available. This file is up to date through 2019-05-13 1301 UTC (DOY 133), compared to 2019-04-10 in the previous version (92). The latest clock file is available from the SOC public website: http://www.srl.caltech.edu/NuSTAR_Public/NuSTAROperationSite/clockfile.php A spline fit that covers the period of the update has residuals which remain within +/- 2 ms except for plot day 3395-96 (2019-04-18 to 19 = DOY 108-109) when there are residuals of ~7 ms.