The Frontier Fields is a Spitzer and HST Director's Discretionary program of six deep fields centered on strong lensing galaxy clusters
in parallel with six deep "blank fields".
These are the deepest observations of clusters and their lensed galaxies ever obtained by Spitzer, and the second deepest observations of blank fields.
Here we provide access to the second release of the Spitzer Frontier Fields
data, which comprises the Director's Discretionary Time (DDT) and public archival data available for the Frontier Fields clusters as of
Dec 1, 2015. The second data release supercedes the first data release and
features improved reductions with better artifact correction and deeper data.
IRSA hosts the Spitzer portion of the Frontier Fields data set. For the HST Frontier Fields data, see