qsoabsfind: A Python Package for Detecting Absorption Line Doublets in SDSS and DESI Quasar Spectra

Code Availability

This is the frozen version of the qsoabsfind codebase used to generate the C IV absorber catalog based on DESI DR1 and DR2 quasar samples.

• The main GitHub repository is available at: https://github.com/abhi0395/qsoabsfind

• qsoabsfind-1.0.5.zip (latest stable version): https://github.com/abhi0395/qsoabsfind/tree/v1.0.5

• qsoabsfind-1.0.3.zip (version used for the DESI DR1/DR2 C IV absorber catalog): https://github.com/abhi0395/qsoabsfind/tree/v1.0.3

Associated Publications

• DESI C IV Absorber Catalog: Methodology and analysis are described in:
  https://arxiv.org/abs/2504.20299

• SDSS Mg II Absorber Catalog: Methodology and analysis are described in:
  https://arxiv.org/abs/2103.15842