SED Extractor

From this page you can download the SED extractor software library, a tool to extract a Spectral Energy Distribution from Healpix, WCS or mixture of Healpix and WCS files, in a specific region of the sky This tool guarantees the photometric accuracy, by using the drizzlib library (

The current library is available in Python3. Examples of test cases are given in

If all files are in the Healpix format, mixing Allsky and Partial Healpix, use the 'mask' keyword if possible (with the file having the less observed pixels) in order to restrict the area to find the common pixels and to significantly reduce time computing.

If you use the SED Extractor for your research, please include the following acknowledgement in your publications:

“We acknowledge the use of the SED Extractor software provided by the Centre d'Analyse de Données Etendues (CADE), a service of IRAP-UPS/CNRS (, Paradis et al., 2012, A&A, 543, 103).”

Python version

Tool to extract the SED: (March 2023)


Project Manager: Jean-Michel Glorian (IRAP)

Scientist: Déborah Paradis (IRAP)

Developpers: Déborah Paradis (IRAP), Jean-Michel Glorian (IRAP)
Previous developper: Hanna Staple (IRAP)