SNID-SAGE: A Modern Framework for Interactive Supernova Classification and Spectral Analysis

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ID: 315989
2026
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Abstract
Abstract We present SNID–SAGE (SuperNova IDentification—Spectral Analysis and Guided Exploration), a framework for supernova spectral classification with both a fully interactive graphical interface and a scriptable command-line pipeline for large-scale processing. The pipeline combines deterministic spectral preprocessing, FFT-based cross-correlation against a curated template library, ranking of candidate matches using a composite quality metric, and consolidation of redshift and classification solutions into a single result with associated quality and confidence estimates. SNID–SAGE includes an upgradeable template library (about 6000 spectra), interactive line identification with velocity measurements, and optional natural-language summaries of classification results. We evaluate SNID–SAGE using two complementary tests: (i) leave-one-out cross-validation, in which each template spectrum is matched against the remainder of the library; and (ii) large-scale application to WISeREP spectra with valid coverage across the 4000–7000 Å interval, irrespective of spectral type, comprising approximately 46 000 spectra, with redshift validation against known host-galaxy measurements where available. The full validation results and the SNID–SAGE framework are publicly available, supporting integration into spectroscopic survey workflows.
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openalex_W7163634900 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Fiorenzo Stoppa, S J Smartt
Journal monthly notices of the royal astronomical society
Year 2026
DOI
10.1093/mnras/stag1066
URL
https://doi.org/10.1093/mnras/stag1066
Keywords Keywords not found

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