HEASARC's web sites were down from Saturday Oct 24 - Weds Oct 28 due to addressing the PHP security vulnerability issue.
Important
Spectral model data files are now distributed separately from HEASoft. After installing HEASoft 6.37+, you must download the model data files separately using ftgetmodeldata in order to use those models. See the spectral model data files page for details.
New issues from Xspec 13.0.0
List of currently outstanding issues.
Patches
There are no patches for version 13.0.0 at this time.