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IRAS

IRAS Data Product

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Point Sources and Small Extended Sources
Point Sources and Small Extended Sources
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Point Source Catalog This is a catalog of 245,889 well-confirmed point sources, i.e., sources with angular extents less than approximately 0.5', 0.5', 1.0', and 2.0' in the in-scan direction at 12, 25, 60, and 100 microns, respectively. More... 1 file 39 MB
Point Source Reject Catalog This is a catalog of 372,774 potential infrared point sources that failed one or more of the confirmation and confusion criteria and were not, thus, included in the Point Source Catalog. More... 1 file 56 MB
High Source Density Bins Regions with more sources per sq. deg than the confusion limit in a given band were processed according to more stringent rules than usual before inclusion in the Point Source Catalog. More... 1 file 247 KB
Working Survey Database and Ancillary Files The WSDB and its Ancillary Files give a detailed description of the observational and data processing history of each IRAS point source. More... 20 files < 8 MB
Low-Resolution Spectrometer Catalog The LRS catalog consists of the spectra extracted for 5425 bright sources in the IRAS Point Source Catalog. More... 1 file 5 MB
Faint Source Catalog The Faint Source Survey (FSS) is the definitive IRAS data set for faint point sources. More... 1 file, 41 MB
Faint Source Reject Catalog The Faint Source Reject Catalog contains 593,516 sources rejected for inclusion in the Faint Source Catalog because they failed to meet one or more of the criteria established to ensure the reliability of the FSC. More... 24 files < 56 MB
Serendipitous Survey Catalog The SSC is a catalog of 12, 25, 60 and 100 micron photometric observations of 43,866 point-like sources detected fortuitiously in the IRAS Pointed Observation program. More... 1 file 8 MB
Small-Scale Structure Catalog The Small-Scale Structure (SSS) Catalog, also known as the catalog of "small extended sources," contains sources resolved by the IRAS in any band (12, 25, 60, or 100 microns) but smaller than 8' in angular extent. More... 2 files 4 MB

Sky Maps and Related Files
Sky Maps and Related Files
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IRAS Sky Survey Atlas and Reject Fields The IRAS Sky Survey Atlas and Reject Fields are images of the sky as measured by IRAS at spatial scales larger than about 5'. More... ~6600 files 0.5 MB each
ISSA Galactic Plane Mosaics For convenience in studying Galactic phenomena, the ISSA and Reject Fields plates were mosaicked and transformed at IPAC to Galactic coordinates in a gnomonic (tangent plane) projection. More... 32 files 6 MB each
Sky Flux Plates This data product is a high-resolution presentation of the IRAS hours-confirmed (HCON) sky surveys in image form. More... ~4800 files < 1 MB each
Galactic Plane Maps For convenience in studying Galactic phenomena, the sky survey data (three sky coverages) within 10° of the Galactic plane were reprojected from the 16.5° x 16.5° Sky Flux Plates into Galactic coordinates. More... ~290 files 1 MB each
Faint Source Survey Plates The Faint Source Survey (FSS) is the definitive IRAS data set for faint point sources. More... ~20520 files < 10 MB each
Low-Resolution All-Sky Maps These images were produced by dividing the 0.5° x 0.5° beam data contained in the standard Zodiacal Observation History File into the three separate sky coverages (HCONs) and assembling them into three maps with an Aitoff equal area projection in Galactic coordinates. More... 24 files .8 MB each
Zodiacal Observation History Files These data products are time-ordered versions of the entire IRAS sky survey and were created to aid modeling and extracting the zodiacal emission intensity in the various extended source data products. More... 7 files 200 MB each

Images of Smaller Fields
Images of Smaller Fields
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Pointed Observations During the 10-month lifetime of IRAS, roughly 40% of the observing time was devoted to pointed observations, also commonly called Additional Observations (AOs). The released POs total 7326. More... ~110890 files, 10-150 KB each
Large Optical Galaxies The "Large Galaxy Catalog" contains IRAS observations of 85 galaxies listed in RC2 with apparent blue light isophotal diameters (D_25) greater than 8'. More... ~670 files 14-526 KB each
High-Resolution Galaxies The Atlas of High-Resolution Maps of Nearby Galaxies (Rice 1993) contains maps of approximately 1' resolution of the 30 most extended galaxies in the Large Optical Galaxy Catalog. More... ~960 files 120-470 KB each
Chopped Photometric Channel Survey The CPC instrument on IRAS was used to make maps at 50 and 100 microns by scanning its 1.2' diameter field of view in raster fashion. Typical maps are 40 x 40 pixels on a 20" grid. More... ~3010 files 11-14 KB each

Point-Source Derivatives
Point-Source Derivatives
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Cataloged Galaxies and Quasars The catalog of galaxies and quasars observed by IRAS (the "Extragalactic Catalog") is a compilation of IRAS Point Source Catalog data for objects appearing in the most widely-used extragalactic catalogs. More... 2 files 2 MB each
1.2-Jy IRAS Redshift Survey This catalog contains redshifts of sources selected from the Point Source Catalog. The sample is flux limited to 1.2 Jy at 60 microns, and a color criterion, f_60 > sqrt(f_12 * f_25), where f_w is the flux density at wavelength w, was used to select galaxies over stars and other sources within the Milky Way. More... 1 file 1 MB

Solar System
Solar System
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Asteroid and Comet Survey The IRAS Asteroid and Comet Survey is the largest, most uniform and least biased survey ever conducted of asteroids and comets. More... 7 files 100 KB and 55 MB
Minor Planet Survey Database The Minor Planet Survey supplements the asteroid data given in the Asteroid and Comet Survey. More... 13 files 11 KB and 2 MB

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A service of the HEASARC and of the Astrophysics Science Division at NASA/GSFC
Goddard Space Flight Center, National Aeronautics and Space Administration
HEASARC Director: Dr. Alan P. Smale
LAMBDA Director: Dr. Eric R. Switzer
NASA Official: Dr. Eric R. Switzer
Web Curator: Mr. Michael R. Greason