MIRI Imaging Dither and Mosaic Simulations

Simulations of MIRI Imaging dither and mosaic simulations. Used for illustrations for JDox.

In Development!

Active development.

Contributors

Karl Gordon

License

This code is licensed under a 3-clause BSD style license (see the LICENSE file).

Dither Patterns

Specific dither patterns can be created using a combination of APT and the miricoord package.

• setup an observation in APT with the desired dither/mosaic pattern
• export the pointing file (File -> Export -> pointing file)
• save to apt_pointing subdirectory
• run python pointing_to_mirisim.py file.pointings - this will create the mirisim compatible file in the mirisim_dithers subdirectory

These instructions are derived from https://innerspace.stsci.edu/pages/viewpage.action?spaceKey=JWST&title=Using+MIRISim+to+create+dithered+mosaic+images

Notebooks

• Create_MIRISim_SkyCube_From_FITS.ipynb: Make the needed MIRISim SkyCube from an input FITS file. The FITS files for this notebook are from large IRAC 8um and MIPS 24um mosaics of the galaxy M101. Manual changes to the lines used switch between the two files.
• MIRISim_Using_Scene_From_File.ipynb: Run a MIRISim Imager simulation based on a SkyCube created using the previous notebook. Main change is the dither pattern. A number available in mirisim_dithers subdirectory created with the above instructions.
• Sims notebooks: Each subdirectory in the Sims directory has a notebook for running the simulated data through the full imaging pipeline. For this to work, the detectory images from the simulation directory must be copied into a subdirectory called stage0. In addition, subdirectories stage1, stage2, and stage3 need to be created.