Far-Infrared Deep Extragalactic Legacy Survey (FIDEL) contains sensitive and extensive far-infrared deep field observations with Spitzer to detect warm dust emission from hundreds of relatively ordinary starburst galaxies and active galactic nuclei at redshifts of 1 to 2 (7 to 10 billion years ago), and thousands more nearby. The survey also detected tens of thousands of high redshift objects at mid-infrared wavelengths. The program obtained data in three fields on the sky. The bulk of the data is in two fields, the Extended Chandra Deep Field South (ECDFS) and the Extended Groth Strip (EGS). A smaller amount of additional data was obtained in the GOODS-North area.
