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The Spitzer First-Look Survey (FLS) was initially motivated by the
scientific loss of the
Wide-Field Infrared Explorer (WIRE) mission in March 1999. WIRE would
have provided small-area imaging surveys at 12 and 25 microns, reaching
sensitivities of a few hundred micro-Janskys, and thereby yielding
important data on galaxy evolution. The FLS is not intended to
scientifically recover the WIRE mission, per se. Rather, it is an attempt
to provide the essential characterization of the mid-infrared sky at
depths comparable to what WIRE would have probed. Pushing two orders of
magnitude deeper in sensitivity than presently known, the FLS will provide
the science community with invaluable data for planning Spitzer
observations.
Go back to FLS page.
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