Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aj....107..280h&link_type=abstract
The Astronomical Journal, vol. 107, no. 1, p. 280-286
Astronomy and Astrophysics
Astronomy
4
Astronomical Catalogs, Infrared Sources (Astronomy), Point Sources, Sky Surveys (Astronomy), Stellar Color, Astrometry, Color-Magnitude Diagram, Infrared Astronomy Satellite, Stellar Magnitude, Stellar Spectra
Scientific paper
Star identifications in the Infrared Astronomical Satellite (IRAS) Point Source Catalog have been combined with optical positions from four astrometric catalogs to yield a catalog with positional accuracies of about 0.2 arcsec for 33,678 infrared sources. The identification of IRAS sources with bright optical stars has been checked by requiring the color V-(12) (with (12) being a magnitude derived from the IRAS flux) to be consistent with the optical colors or spectral type. Observed V-(12) colors several magnitudes redder than predicted from optical colors have usually been interpreted as evidence of excess 12 microns flux, but many stars with such colors are shown also to have an overly red V - K color. The K magnitude (2.2 microns) has been estimated using the 12 microns flux and the spectral type or observed optical color for each of the 18,525 stars that have no evidence of an unusual 12 microns flux.
Harrington Robert S.
Hindsley Robert B.
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