Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...361...49s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 361, Sept. 20, 1990, p. 49-62. Research supported by NASA IRAS Extended Mis
Astronomy and Astrophysics
Astronomy
151
Galaxies, Infrared Astronomy Satellite, Infrared Sources (Astronomy), Red Shift, Sky Surveys (Astronomy), Data Sampling, Hysteresis, Point Sources
Scientific paper
A complete all-sky sample of objects, flux-limited at 60 microns, has been extracted from the data base of the IRAS. The sample consists of 5014 objects, of which 2649 are galaxies and 13 are not yet identified. In order to study large-scale structure with this sample, it must be free of systematic biases. Corrections are applied for a major systematic effect in the flux densities listed in the IRAS Point Source Catalog: sources resolved by the IRAS beam have flux densities systematically underestimated. In addition, accurate flux densities are obtained for sources flagged as variable, or of moderate flux quality at 60 microns. The IRAS detectors suffered radiation-induced responsivity enhancement (hysteresis) due to crossings of the satellite scans across the Galactic plane; this effect is measured and is shown to be negligible.
Davis Martin
Huchra John P.
Strauss Michael A.
Yahil Amos
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