SPAN (SPectral ANalysis) is a cross-platform graphical user interface (GUI) application for extracting, manipulating, and analyzing astronomical spectra. It is optimized for the study of galaxy spectra across the near-ultraviolet (NUV) to near-infrared (NIR) atmospheric windows.
SPAN extracts 1D spectra from FITS images and datacubes, performs spectral processing (e.g., Doppler correction, continuum modelling, denoising), and supports analyses such as line-strength measurements, stellar and gas kinematics, and stellar population studies, using both built-in routines and the widely adopted pPXF algorithm (ascl:1210.002) for full spectral fitting.
It runs on Windows, Linux, macOS, and Android, and features an intuitive, task-oriented interface. The goal of SPAN is to unify essential tools for modern spectral analysis into a single, user-friendly application that offers a flexible and accessible environment while maintaining scientific accuracy.