CIAO

conda create -n ciao-4.16 -c https://cxc.cfa.harvard.edu/conda/ciao -c conda-forge ciao pyciao sherpa ds9 ciao-contrib caldb_main marx python=3.11
conda activate ciao-4.16
pip uninstall pillow
pip install --no-cache-dir pillow
pip install astropy tqdm
git clone https://github.com/bcalden/ClusterPyXT
cd ~/ClusterPyXT
python clusterpyxt.py --continue

blanksky_image bkgfile='_background_clean.evt' outroot='_blank' imgfile='_0.5-7_thresh.img' tmpdir=./ clobber=yes
merge_obs