The continuum tool (ctool) is a simple function to easily, automatically, and quickly estimate the continuum of an emission line spectrum to high precision. It uses an iterative process median-filter out narrow lines while preserving low-frequency variation. The final continuum spectrum uses a Savitzky-Golay filter.

iSLAT (the interactive Spectral-Line Analysis Tool) provides an interactive interface for the visualization, exploration, and analysis of molecular spectra. Synthetic spectra are made using a simple slab model; the code uses molecular data from HITRAN. iSLAT has been tested on spectra at infrared wavelengths as observed at different resolving powers (R = 700-90,000) with JWST-MIRI, Spitzer-IRS, VLT-CRIRES, and IRTF-ISHELL.