S4G

• Spitzer Survey of Stellar Structure in Galaxies [1]

a deep 3.6 and 4.5 $\mu$m imaging survey of 2352 nearby ($< 40$ Mpc) galaxies.

the S$^4$G data analysis pipeline 4, which is dedicated to 2-dimensional structural surface brightness decompositions of 3.6 $\mu$m images, using GALFIT3.0 \citep{peng2010}.