New issues from Xspec 12.13.1
For Mac OS users attempting to build the relxill local model
package with the clang++ compiler, you will first need to download and run
this shell script from your
heasoft-[ver]/Xspec/src directory. Note that this is the same
directory from which you would normally install Xspec patch files.
Frequently Asked Questions
List of currently outstanding issues.
12.13.1e (Oct 10, 2023)
Requires patch installer
For details about the patch installer, including options available with the latest v4.17, see the installer notes
To apply patches, you'll need to have downloaded and already built the source code distribution of XSPEC. Your HEADAS environment variables must also be initialized, such as with the headas-init script as you would if you were running XSPEC.
To update your XSPEC installation with ALL listed patches:
If you don't already have the
tcl script (v4.17), download and place it in the
heasoft-[ver]/Xspec/src directory in the source code distribution.
into the same directory. There is no need to unzip/untar the patchfile since
the installer will do that.
At the command line, launch the script by typing
and that's all.
The script will detect which patches you've installed previously, copy the new code files to the necessary directories, determine whether complete or only partial rebuilds are necessary, and finally perform the rebuilds. Numbers listed in red indicate that the patch modifies the interface to one or more of XSPEC's libraries. These patches will generally cause longer rebuilds. If you have a local model library, it is recommended (though not always necessary) that you rebuild it with initpackage after applying red patches.
|Table models with both redshift and escale set are not
handled correctly. Our thanks to Doug Burke for reporting this.
Report added on Aug 23, 2023.
This patch modifies Xspec/src/XSModel/Model/Component/OGIPTable/
|When an MCMC chain file contains response parameters, Xspec is
falsely reporting mismatches between the chain parameters and the current
variable fit parameters. Therefore it doesn't allow the chain to be used
for uncertainty estimates in place of fit covariance values. Our thanks to
Kenji Hamaguchi for reporting this.
Report added on Sep 08, 2023.
This patch modifies Xspec/src/XSFit/Fit/
|In PyXspec's AllModels.addPyMod method, usage of a deprecated
Python function is preventing execution with the latest Python v3.11.
Our thanks to Fabio Muleri for reporting this.
Report added on Sep 11, 2023.
This patch modifies Xspec/src/XSUser/Python/xspec/
|There is an error in the calculation of the pgstat statistic.
Our thanks to Yanqui Zhang for reporting this.
Report added on Sep 11, 2023.
This patch modifies Xspec/src/XSStat/
|The vvapec, bvvapec, vvtapec, and bvvtapec models all
deal with the H abundance parameter incorrectly. If it is
not zero, it is reset to one. So, e.g. setting the H abundance to
0.5 in vvapec actually produces a spectrum with the H abundances as
1.0. If the H abundance is set to 1.0 (the default and usual
setting) the results are correct. We thank Denis Leahy and Adam
Foster for pointing this out.
Report added on Oct 10, 2023.
This patch modifies Xspec/src/XSFunctions/
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Last modified: Tuesday, 10-Oct-2023 16:22:20 EDT