CHIP (Caltech High-res IRS Pipeline) reduces high signal-to-noise short-high and long-high Spitzer-IRS spectra, especially that taken with dedicated background exposures. Written in IDL, it is independent of other Spitzer reduction tools except IRSFRINGE (ascl:1602.016).

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.