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  • DOWNLOAD SMART HERE. Use also this page to check for scheduled updates and to check information on the present and past versions.
  • If you use SMART to process your Spitzer IRS data, please include appropriate citations in your published papers.

Documentation & Help

Should I use SMART or CASSIS?

SMART is a reduction and analysis tool with many features to manage various data products from the IRS (and other instruments, e.g., ISO), extract spectra in multiple ways, and examine spectra in details (fringes, fit of spectral features, black body fitting, etc...). SMART allows extracting spectra of complex objects (multiple, blended, with an extended background emission, etc...). The list of possibilities within SMART is too long to list here.

CASSIS is an atlas in which spectra have been reduced and extracted automatically. The extraction method is selected automatically based on the source extent, providing a publication-ready spectrum.

In summary:

  • Spectral extraction: if the spatial structure of the source doesn't have to be decomposed and if the source is less extended than the aperture, users are encouraged to use CASSIS spectra. We advise users to explore the various diagnostic tools available on the CASSIS website to judge the quality of the extraction.
  • For any other use than investigating a spectrum (e.g., to view IRS detector images, perform specific tasks like line fitting), and in particular to extract spectra of complex sources, users are encouraged to use SMART.


SMART has been developed by the IRS team at Cornell. SMART stands for Spectroscopy Modeling Analysis and Reduction Tool. It is a software tool developed for processing Spitzer (SIRTF) IRS observations.

It allows the user to perform a wide variety of processing and analysis tasks in real time, including:

  • Project manager with images and/or spectra
  • Detector image viewing
  • Image operations (basic operations, median, multiple subtraction, ...)
  • Spectral extraction (optimal, tapered column, full slit, extended sources, ...)
  • Spectral extraction of multiple sources, blended sources, sources with complex background
  • Full wavelength sampling when staring mode is used
  • Analysis of spectra (line fitting, blackbody, photometry, ...)
  • Built-in calls to IRSCLEAN and PAHFIT
  • Compatibility with CUBISM

SMART can be used in either of two ways :

  • Interactively through a GUI window interface.
  • In script (batch processing) mode from a command line.

  • A modified ATV (developed at SSC-Caltech and Cornell).
  • IDP3 for image analysis of our peak up cameras (developed at Arizona University).
  • A defringing tool (developed at Leiden University, SRON at Groningen University and Caltech).

The ISAP team team kindly provided source code for ISAP Version 2.1. This code has been modified to produce the IDEA window for use in IRS analysis. The ISAP Development Team included people from CESR, IAS, IPAC, MPE, QMW, RAL and SRON.


SMART is developed and maintained at Cornell University by the SMART team:

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