Infrared Astronomical Satellite, IRAS
Faint Source Survey Plates
The Faint Source Survey (FSS)
is the definitive IRAS data set for faint point sources. The FSS was produced
by point-source filtering the individual detector data streams and then
coadding those data streams using a trimmed-average algorithm. The resulting
images, or plates, give the best estimate from the IRAS survey data of
the point source flux density at every surveyed point of the sky. Moshir
et al. (1992) describe the processing methods used to produce the plates
and give cautionary notes about the interpretation of the images (cf.
the Faint Source Catalog).
The Survey is provided in 171 large .fits files (typically 0.5 GB each). File 001.tar includes plates 0001 to 0009, file 002.tar plates 0010 to 0019, etc..
NOTE: These images are point-source filtered and should not be used for studying extended emission. Also, a slight calibration improvement was determined after these images were produced, and the flux density and noise grids at 12, 25, 60, and 100 microns should be multiplied by 1.015, 1.008, 0.9674, and 0.9665, respectively.
Version and release date: 1.0, 1988 Dec
(|beta| > 50°); 1.0, 1990 Sept (|beta| < 50°)