These draft notes cover the major updates made by Data Release Production to the LSST stack since release 12 (Winter/Extra 2016). Please add material here which should ultimately be incorporated into the notes accompanying the Fall 2016 release.
Major Functionality and Interface Changes
Add a measurement extension which performs Kron photometry
The KronFluxAlgorithm measures the flux in an elliptical aperture as defined by Kron (1980). The plugin is not enabled by default, but may be switched on by requesting ext_photometryKron_KronFlux in measurement configuration.
DM-3440 - Getting issue details... STATUS
Bug Fixes
Correct CModel table schema units
Units for the time field changed from seconds to second to comply with the Astropy convention.
DM-6282 - Getting issue details... STATUS
Restore capability of calculating temporary local backgrounds in source detection
Our SourceDetectionTask provides the optional capability of fitting and temporarily removing a local background before detecting sources. This capability was accidentally disabled in the X/W16 release (v12); it has now been restored. It is disabled by default.
DM-5323 - Getting issue details... STATUS
Build & Code Improvements
Migration from Boost to standard library equivalents
Continuing work started in the previous release, we have audited the stack for use of the Boost libraries. Where possible, Boost has been replaced with C++11 standard library equivalents.
DM-5880 - Getting issue details... STATUS DM-6089 - Getting issue details... STATUS DM-6090 - Getting issue details... STATUS DM-6091 - Getting issue details... STATUS DM-6092 - Getting issue details... STATUS DM-6093 - Getting issue details... STATUS DM-6094 - Getting issue details... STATUS DM-6095 - Getting issue details... STATUS DM-6096 - Getting issue details... STATUS DM-6097 - Getting issue details... STATUS DM-6325 - Getting issue details... STATUS
Properly log warnings in ObjectSizeStarSelector
Previously, non-fatal NumPy warnings of the form RuntimeWarning: invalid value encountered in less could appear on the console, but not be caught and logged anywhere. It was therefore easy to miss problems arising when running the algorithm. These warnings are now ingested into the LSST logging system, and are hence recorded properly.
DM-5428 - Getting issue details... STATUS