GalSim Version 1.4 released

[Mike Jarvis]

We are happy to announce a new version of GalSim: Version 1.4.

Highlights of the new functionality:

- Significantly improved config functionality.  See full documentation.

- New full phase-screen implementation of atmospheric PSFs.

- Improvements to COSMOSCatalog class, including support for deeper (I < 25.2) COSMOS catalog, downloadable via galsim_download_cosmos.

- New FourierSqrt operator

- New lsst module with LSST WCS and chip layout.  (Requires installation of LSST-DM stack.)

- More features relevant for simulating MerCaT (e.g. WFirst) sensors.

- Python 3 support.

- Various bug fixes and other more minor feature additions.  Read the CHANGELOG for the full set of changes from v1.3 to v1.4.

Installation:

We added one new dependency, future, to ease the compatibility with Python3.  It is easy to install, so do this first:

    pip intall future

Then grab the v1.4.1 tarball and install GalSim in the usual way.  It is also available on Macs via fink (fink install galsim) or MacPorts (port install galsim).  

See the INSTALL.md file for complete details.

Finally, it is also being packaged along with the LSST DM stack, so if you have that, you can just do eups distrib install galsim 1.4.  (1.4 probably isn't there yet, but it should be with the next release of the stack.)

Peace,

Mike, on behalf of the GalSim developers