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This new generation of IRAS images, called
IRIS, benefits from better zodiacal light
subtraction, calibration and zero levels
compatible with DIRBE, and better destriping.
At 100 microns, the IRIS product is also a
significant improvement over the Schlegel et
al. (1998) maps. IRIS keeps the full ISSA
resolution, includes well calibrated point
sources, and the diffuse emission calibration
at scales smaller than 1 degree was corrected
for the variation of the IRAS detector
responsivity with scale and brightness. The
uncertainty on the IRIS calibration and zero
levels is dominated by the uncertainty of the
DIRBE calibration and the accuracy of the
zodiacal light model.
Also available are IRIS
image "cutouts"
using IRSA's
Cutouts Service, which is a general tool to create single or multiple small FITS
(and JPEGs) image cutouts of datasets archived at IRSA.
IRIS images are represented as overlays in
red on the
ISSA all-sky composite image above. Either type
in a coordinate or click on any red region to
get a close-up of the area; the size of the
search is adjustable.
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