v2.1.1

• Set version number in imsim/_version.py

v2.1.0

• LSST ComCam simulation support #448, #449, #450
• Improved config handling of camera-specific info #459
• Fix to avoid repeated renderings of objects if the input catalog is smaller than the number of requested objects #463
• Improved instCat reading efficiency #466
• Bug-fix for test_psf.py #467
• Refactor of stamp code #468
• Improved rotSkyPos calculation #469
• Sky background calculation bug-fix #470
• Add code to parse astropy QTables for AOS studies #472
• Add LSSTCamSim as a camera type to distinguish simulated data from real LSSTCam data #473
• CI and installation doc bug-fixes #476
• Pupil coordinates bug-fix #477
• Seqnum bug-fix #478
• Improved tree ring handling for multiprocessing #479
• Updates to photon op tests for photon pooling code #484
• Interface changes for using skyCatalogs v2.0.1 #485
• Add GHA CI tests using cvmfs distributions of the LSST stack #487
• Photon pooling code and image/stamp refactoring #424

v2.0.0

Release v2.0.0 comprises several major changes since v1.0.0, the version used for the DC2-era simulations.

• We've removed dependence on deprecated lsst_sims code.
• The GalSim Config Module is now used for configuring and executing simulations.
  • This entailed rewriting and adding several imSim classes as subclasses of the GalSim Config classes.
  • Configurations for imSim runs are provided by yaml files, enabling alternate versions of psf models, sensor implementation, output formats to be readily swapped in and out.
• The skyCatalogs package is used for representing the input object catalogs and replaces the use of instance catalogs for the simulation of individual exposures. For backwards compatibility, we've provided an updated interface that works with the original instance catalog format.
• The batoid ray-tracing package and batoid_rubin model of the Simonyi telescope are used for simulating the effects of optical distortions using a realistic model for the Rubin optical system.
  • This enables the simulation of out-of-focus images, vignetting of galaxies, stars, and other astrophysical objects, and optical features such as diffraction spikes.
• For using simulated observing cadences produced by the Rubin project, a direct interface to the OpSim database files has been added.
• Various other improvements to the realism of the simulations include:
  • Sub-CCD-scale gradients of the sky background based on the rubin_sim.skybrightness code.
  • A spline model of the vignetting of the sky background based on batoid simulations.
  • An interface to the as-built LSSTCam parameters as read from the obs_lsst package.
  • A model of CCD fringing based on laboratory measurements of LSSTCam CCDs.

DC2-Run3.0i

v1.0.0

Merge pull request #245 from LSSTDESC/u/jchiang/handle_checkpoints_w_…

DC2-Run3.0i-rc

Release candidate for Run3.0i

DC2-Run2.2i p2

Disable checkpoint summary process by default to avoid problems with multiprocessing causing jobs to hang indefinitely after all sensor-visits have finished #236

DC2-Run2.2i p1

Production release for Run2.2i with a patch to disable IERS downloads by astropy.

DC2-Run2.2i

Production release for Run2.2i

DC2-Run2.2i-rc

Release candidate for Run2.2i.

DC2-Run2.1i v2 p1

Patch release of DC2-Run2.1i:

• Atomic writing of raw files to avoid incomplete FITS files (#215)
• Re-ordering of WCSAXES keyword in raw file FITS headers (#219)