Spitzer Survey of Stellar Structure in Galaxies (S4G) Overview
S4G Overview S4G Primary Data Access IRSA Catalog Search Tool: S4G


S4G consists of a sample of 2,352 galaxies, which have been mapped with IRAC channels 1 and 2 (3.6 and 4.5 microns). IRSA hosts the complete S4G project data set, including results from galaxy modeling using ellipse fitting and Galfit, and Independent Component Analysis to separate stellar and nonstellar emission. A catalog of photometry, model parameters, measurements from the literature, and a link to the S4G data for each galaxy is also available.
If you use S4G data, please cite Sheth et al. (2010), Munoz-Mateos et al. (2013), and Querejeta et al. (2015).

Data Set Characteristics

Data ProductDescriptionData Access
Images Spitzer/IRAC 3.6, 4.5
Models Ellipse fitting
Browseable Directories
Stellar Independent Component Analysis Stellar & nonstellar emission maps Browseable Directories
Catalog S4G Catalog

S4G Documentation

Pipeline Documentation
Galfit Model Documentation
Stellar ICA Documentation
S4G Catalog Descriptions
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