https://asc.harvard.edu/sherpa/ahelp/beta2d.html
Ahelp: beta2d - CIAO 4.18 Sherpa
The Sherpa package for fitting and modeling data (part of CIAO).
ciaosherpa
https://cxc.cfa.harvard.edu/sherpa/ahelp/beta2d.html
Ahelp: beta2d - CIAO 4.18 Sherpa
The Sherpa package for fitting and modeling data (part of CIAO).
ciaosherpa