IRASFSC Catalog
The Faint Source Survey (FSS) is the definitive Infrared Astronomical
Satellite (IRAS) data set for faint point sources. The FSS was produced by
point-source filtering the individual detector data streams and then
coadding those data streams using a trimmed-average algorithm. The
resulting images, or plates, give the best estimate from the IRAS
survey data of the point source flux density at every surveyed point
of the sky. The Faint Source Catalog (FSC) is a compilation of the
sources extracted from the FSS plates that have met reasonable
reliability requirements. Averaged over the whole catalog, the FSC is
at least 98.5% reliable at 12 and 25 microns, and ~94% at 60 microns.
For comparison, the IRAS Point Source Catalog (PSC) is >99.997%
reliable, but the sensitivity of the FSC exceeds that of the PSC by
about a factor of 2.5. This increase in sensitivity results from the
co-adding of the three separate hours-confirming (HCON) passes over
the sky which were used for confirmation and not added together for
the Point Source Catalog. The FSC also contains 99,973 infrared sources
which are not in the PSC. The FSC contains data for 173,044 point sources
in unconfused regions with flux densities typically above 0.2 Jy at
12, 25, and 60 microns, and above 1.0 Jy at 100 microns. The FSS
plates are somewhat more sensitive but less reliable than the FSC;
typically, only sources with SNR > 5 - 6 in the plates are contained
in the FSC. The data products, the processing methods used to produce them,
results of an analysis of these products, and cautionary notes are
given in the Explanatory Supplement to the IRAS Faint Source Survey.
This database table contains the IRAS Faint Source Catalog (FSC)
(Version 2.0, released in September 1990) non-associations data.
The associations data for the IRAS FSC is contained in
the file ftp://cdsarc.u-strasbg.fr/pub/cats/II/156A/assoc.dat.gz
The FSC is limited in galactic latitude to the unconfused regions of sky in
which the absolute value of BII is greater than or equal to 10 degrees at 12
and 25 microns and greater than or equal to 20 degrees at 60 microns. Because
of the presence of the infrared "cirrus" at 100 microns, the FSC does not
contain sources detected ONLY at 100 microns. Sources with a 100 micron
detection were included in the catalog if they were bandmerged with high
reliability detections at other spectral bands. For the faintest sources,
the reliability exceeds 90% at 12 and 25 microns, and 80% at 60 microns.
IRASPSC Catalog
The IRAS Point Source Catalog, Version 2.0, is a catalog of some
250,000 well-confirmed infrared point sources observed by the Infrared
Astronomical Satellite (IRAS), i.e., sources with angular extents less than
approximately 0.5, 0.5, 1.0, and 2.0 arcminutes in the in-scan direction at
12, 25, 60, and 100 microns (µm), respectively. Positions, flux densities,
uncertainties, associations with known astronomical objects and various
cautionary flags are given for each objectin the catalog. Away from confused
regions of the sky, the survey is complete to about 0.4, 0.5, 0.6, and 1.0
Janskies (Jy) at 12, 25, 60, and 100 microns, respectively. Typical position
uncertainties are about 2 to 6 arcseconds in the in-scan direction and about
8 to 16 arcseconds in the cross-scan direction.
IRASPSCZ Catalog
The IRAS Point Source Catalog Redshift (PSCz) Survey consists of redshifts,
infrared and optical photometry, and assorted other information for 18351
IRAS sources, mostly selected from the Point Source Catalog. The survey was
designed to select almost all galaxies with flux brighter than 0.595 Jy at 60
microns (µm), over the 84% of the sky with extinction small enough that
reliable and complete optical identification and spectroscopy was possible.
Some of the sources are not galaxies and some are multiple entries for the
same galaxy as described in the reference paper. There are in total 15,411
galaxies or possible galaxies, for which redshifts are available for 14,677.
The galaxies without redshift are mostly distant or at low latitude, as
described in the paper. Many of these galaxies have now been observed as part
of the BTP project (Saunders et al 1999, astro-ph/9909174 "The Behind the
Plane Survey"), and their redshifts were to be included in future revisions
of this catalog.
The full catalog for the PSCz Catalog contains more than 120 parameters and
is available at the CDS in the directory
http://cdsarc.u-strasbg.fr/ftp/cats/VII/221/ as the files pscz.dat (18,351
sources in the main catalog) and psczcg.dat (60 additional sources close to
the coverage gap). There is also a 'short' version of the catalog, psczvs.dat
and psczcgvs.dat, containing 19 parameters, sufficient information for most
studies. They correspond to the version 2.2.
Many fields are taken directly from the IRAS Point Source Catalogue (CDS Cat.
II/125). See the IRAS Explanatory Supplement (Beichman et al., 1988, NASAR,
1190, 1) for more information. If there are problems that cannot be resolved
by careful reading of these notes or the accompanying paper, please contact
Will Saunders <will@roe.ac.uk> or Will Sutherland
<W.Sutherland1@physics.ox.ac.uk>.
IRASSSC Catalog
The Infrared Astronomical Satellite (IRAS) Serendipitous Survey
Catalog (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. The main objective was to take
advantage of the longer-than-nominal integration time per source to extend
the detection threshold relative to that of the IRAS Point Source Catalog
(PSC); about three-fourths of the SSC sources do not appear in the PSC.
From 1813 Pointed Observation fields, the effective sky coverage is
1108 square degrees. Relative to the PSC, the SSC is characterized by:
enhanced sensitivity (by a factor of about 4) in all four wavelength
bands; excellent reliability in uncrowded fields; uneven sky coverage
and completeness; reduced positional accuracy; improved photometric
accuracy; much greater depth in crowded fields at the expense of
reliability and accuracy. More information about the SSC data processing,
the catalog format, and an analysis are given in the Explanatory Supplement
to the IRAS Serendipitous Survey Catalog.
IRASZSURV Catalog
This is The Redshift Survey of Fisher, Huchra, Strauss, Davis, Yahil
and Schlegel; the data set is described in full in ApJ 361, 49 (1990).
The data for the brighter half are included in ApJ Supp 1992, 83, 29;
the data for the fainter half are included in ApJ Supp 1995, 100, 69.
The survey contains 9897 objects selected from the IRAS database
according to the following criteria:
F60 > 1.2 Jy;
F60^2 > F12 f25;
|b| < 5;
high source density flag at 60 microns not raised.
Thus, this database consists of both galaxies and Galaxian
contaminants. The sample contains ~5320 galaxies, and 14 objects
without identifications at the present time.
