Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mrc..rept.....k&link_type=abstract
Report, 11 Jan. - 11 May 1990 Mission Research Corp., Santa Barbara, CA.
Astronomy and Astrophysics
Astronomy
Background Radiation, Celestial Geodesy, Flux Quantization, Infrared Astronomy Satellite, Infrared Radiation, Sensitivity, Telescopes, Clutter, Galactic Evolution, Image Resolution, Point Sources, Spatial Resolution, Star Formation, Temporal Distribution
Scientific paper
This document reports on the efforts to define the IRAS confused regions. The subset will be limited by the availability of survey data in the regions which are identified as point source confused by the current (Ver 2.0) IRAS point source catalog (PSC). Available coincident AO data will be an important validation source. The sensitivity and spatial resolution capabilities of the IRAS telescope failed to resolve individual sources in many regions of high source density. Approximately 10 percent of the sources catalogued in the PSC are tagged as 'confused' in some way; the location of a source, the number of sources at a location, the temporal occurrence and variation of a source, and/or the intensity of a source(s) was not discernible by the source identification/discrimination methods used to compile the PSC. In these regions of infrared clutter, the PSC can underestimate the number of point sources by as much as a factor of 3 to 5 in the IRAS Bands 1 and 2 (12 and 25 microns respectively). Analysis for improved source counts is designed to enhance the description and spatial definition of the mid- and long-wavelength infrared celestial background, and includes generation of high spatial resolution images of the confused regions. Analysis of these images will improve the accuracy of source counts, locations, and flux estimates in the PSC. More detailed knowledge of the high source density regions will improve our ability to understand star formation and galactic evolution.
Kennealy John P.
Korte Rose M.
Woodward Charles E.
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