Euclid Quick Data Release (Q1): From spectrograms to spectra: the SIR spectroscopic Processing Function

Understand

The Euclid space mission aims to investigate the nature of dark energy and dark matter by mapping the large-scale structure of the Universe.

• A key component of Euclid's observational strategy is slitless spectroscopy, conducted using the Near Infrared Spectrometer and Photometer (NISP).
• This technique enables the acquisition of large-scale spectroscopic data without the need for targeted apertures, allowing precise redshift measurements for millions of galaxies.
• These data are essential for Euclid's core science objectives, including the study of cosmic acceleration and the evolution of galaxy clustering, as well as enabling many non-cosmological investigations.