VisFITS: Dark Matter vs Baryonic Matter Overlay

Creates overlay visualizations of weak lensing data to show dark matter distribution relative to baryonic matter around galaxy clusters.

Quick Start

1. Set up environment:

   conda env create -f visfits.yml

2. Edit file paths in submission.sh:

   COADDPATH="/path/to/your/coadd.fits"
   EMODEPATH="/path/to/your/emode.fits"

3. Run:

   sbatch submission.sh

4. Get your overlay:

   ls outputs/
   # -> galaxy_cluster_analysis_overlay.png

What You Get

One overlay image showing:

• Gray regions: Baryonic matter (visible galaxies from coadd)
• Purple regions: Dark matter distribution (from E-mode reconstruction) One flow chart showing:
• Coadd image
• E-mode mass map
• Then the same overlay image

Requirements

• Completed SuperBIT lensing pipeline (coadd FITS file)
• SMPy E-mode reconstruction (E-mode FITS file)
• SLURM cluster access

Customization

Edit these variables in submission.sh:

• OUTPUT_NAME - Base name for output files
• COADD_ALPHA - Transparency of baryonic matter layer (0-1)
• EMODE_ALPHA - Transparency of dark matter layer (0-1)

Output

Both files in the ./outputs/ directory.

This overlay reveals where dark matter is concentrated relative to visible matter.