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ASCL Code Record

[ascl:2411.020] Diagnose: Spectral classification code

The spectral classification code Diagnose assigns one of four classifications (star, galaxy, quasar, or unknown) to each source and returns a redshift estimate for the galaxies and quasars and a velocity estimate for the stars. The code uses a chi-squared minimization for linear combinations of principal component templates to determine a best-fit spectral classification and redshift estimate. It computes three best-fit chi-squared values: one for stellar type and velocity, one for galaxy type and redshift, and one for a quasar and redshift. Diagnose then compares the best fit of these three reduced chi-squared values to the second best fit and evaluates the difference against a statistical threshold.

Code site:
https://github.com/grzeimann/Diagnose https://doi.org/10.5281/zenodo.13755510
Described in:
https://ui.adsabs.harvard.edu/abs/2024ApJ...966...14Z
Bibcode:
2024ascl.soft11020D

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ascl:2411.020
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