IRASPSCZ - IRAS Point Source Catalog Redshift (PSCz) 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 <email@example.com> or Will Sutherland <W.Sutherland1@physics.ox.ac.uk>.
The PSCz catalogue Saunders W., Sutherland W.J., Maddox S.J., Keeble O., Oliver S.J., Rowan-Robinson M., McMahon R.G., Efstathiou G.P., Tadros H., White S.D.M., Frenk C.S., Carraminana A., Hawkins M.R.S. <Mon. Not. R. Astron. Soc. 317, 55 (2000)> =2000MNRAS.317...55S
This field indicates from which CDS table/sample the entry originates: 'Main' if it comes from the main table psczvs.dat, or 'Near-gap' if it comes from the table of 60 sources near the coverage gap, psczcgvs.dat.
The source designation for these sources, called 'CPNAME' in the CDS documentation. In the original CDS table, the names were of the form 'A/123/456': the HEASARC has changed these by adding the 'PSCz' prefix and changing the slashes to dashes, e.g., 'PSCz A-123-456'. Note that neither of these formats conform to the edicts of the Dictionary of Nomenclature of Celestial Objects or are recognized by the SIMBAD name resolver. If the source has a non-blank alternative designation (the alt_name parameter), it should always be referred to by that name.
An alternative optically-derived designation for the source.
The source category flag, called 'CPSCZ' in the CDS documentation, coded as follows:
Value Meaning = PSC (or PSC reject file) source, and not a large-diameter optical galaxy. + addscanned large optical galaxy added to PSCz. - PSC source associated with a "+" addscan object (normally excluded). & high latitude PSCz source, but in a bin excluded by psczmask.dat. ^ high latitude optical galaxy, in a bin excluded by psczmask.dat.
The redshift status flag, called 'CZSTAT' in the CDS documentation, coded as follows:
Value Meaning 1 PSCz redshift, excellent quality. 2 PSCz redshift, good quality. 3 PSCz redshift, low s/n but secure. 4 PSCz redshift, marginal detection, unreliable. l literature redshift, see r_Hvel for details. p private communication, see r_Hvel for details. q redshift from QDOT (J/MNRAS/308/897) or QCCOD. x Give up, too optically faint (B or b_J > 19.5 mag). - Don't need it: galactic source, duplicate, part of larger galaxy etc.
The classification flag value for the source based on optical data, etc., and called 'CLASS' in the CDS documentation, coded as follows:
Value Meaning g : galaxy or galaxies gf: faint galaxy, B or b_j > 19.5 mag. go: optical galaxy with 1D addscanned flux gr: Rice et al. (1988, ApJS, 68, 91) galaxy with 2D coadded photometry ss: star, confirmed spectroscopically (by us, 1.2 Jansky or de Grijp) bs: bright star from plate or telescope TV, no spectrum is: star from IRAS colors and plate/TV appearance c : cirrus pn: planetary nebula rn: reflection nebula h2: HII region zz: other galactic source lm: in Large Magellanic Cloud sm: in Small Magellanic Cloud vb: visually blank on sky survey plates, no non-stellar id kb: K' image blank, no non-stellar id rb: radio blank, no 6 or 20cm id de: delete from catalogue, part of extended galaxy d1: delete from catalogue, broken up 1HCON source already listed elsewhere du: deleted optical galaxy, part of multiple system unresolved by IRAS dr: deleted optical galaxy, already in as Rice et al. (1988, ApJS, 68, 91) galaxy ao: PSC source associated with addscanned optical galaxy ar: PSC source associated with Rice et al. (1988, ApJS, 68, 91) optical galaxyThe divisions above between Galactic classifications 'pn','rn' etc are not rigorous. The 'go' and 'gr' sources were optically selected (see reference paper) and their IRAS fluxes determined by addscanning or coadding. Their fluxes (F12 to F100) are addscan or coadded fluxes, reduced by a factor 1.1 to bring them statistically into line with PSC fluxes. Where the resulting flux 60-um flux is 0.6 Jy or greater, they are added to the catalogue and flagged with source_type (CPSCZ) = '+'. There are 1467 such sources representing 1402 individual galaxies resolved by IRAS. The associated PSC source is retained in the catalog, but is flagged as CPSCZ='-' and will normally be excluded (1290 sources).
The Right Ascension of the source in the selected equinox. The positions were given in B1950.0 equatorial coordinates to a precision of 0.1 seconds of time in the input files.
The Declination of the source in the selected equinox. The positions were given in B1950.0 equatorial coordinates to a precision of 1 arcsecond in the input files.
The Galactic Longitude of the source.
The Galactic Latitude of the source.
The flux of the source at 60 um, in Jansky (Jy).
The best available heliocentric velocity of the source, cz, in km/s.
The uncertainty in the heliocentric velocity of the source, in km/s.
The coded reference for the source of the heliocentric velocity, where negative values are from PSCz or are private communications):
Value Meaning -99 INT/FOS or AAT/FORS -98 NOT -97 CTIO 60" -96 Fairall for PSCz -95 Nancay measurements for PSCz -94 AAT service data -93 INT/IDS500 -92 Cananea -91 Parkes -90 WHT/FOSII -32 Juraszek -31 Visnanathan -30 Kraan-Kortweg -29 Lu, Pantoja -28 Nancay -27 Chamaraux, Yamada, Takata, Nakanishi -25 WHT Ultraluminous -24 QCCOD pole extension -23 QCCOD -21 Giovanelli + Haynes -20 DaCosta -10 - 70 as in Huchra 1991, See CDS Cat. <VII/193> 83 QDOT, Lawrence et al., CDS Cat. <J/MNRAS/308/897> 84 Leech et al., 1988MNRAS.231..977L 85 NED, see http://nedwww.ipac.caltech.edu/ 86 PGC (CDS Cat. <VII/119>), LEDA 87 1.2Jy, CDS Cat. <VII/185> 88 Allen et al., 1990ApJ...355..130A 89 Seeberger 90 RC3 HI, CDS Cat. <VII/155> 91 RC3 optical, CDS Cat. <VII/155> 92 Fairall 97 Tully 1987ApJ...321..280T 98 Lonsdale and Hacking 1989ApJ...339..712L, Lonsdale 1986 (see Eales et al., 1988ApJ...328..530E)
The 100-um background, in mJy sr-1, taken from Rowan-Robinson et al. (1991, MNRAS, 249, 729) called 'I100B' in the CDS documentation. This is averaged over the 1-square degree 'lune bin' (see App. X.1 of the IRAS Explanatory Supplement, Beichman et al., 1988, NASAR, 1190, 1 for more details) in which the source resides, and is corrected for all IGAL sources.
The estimated average B extinction, in magnitudes, based on the 100-um background, for that lune bin in which the source resides. This has been crudely corrected for the temperature variation of dust across the galaxy
The high source density flag, encoded as a hexadecimal. See App. X.1 of the IRAS Explanatory Supplement, (Beichman et al., 1988, NASAR, 1190, 1) for more details.
This parameter called 'MHCONB' in the CDS documentation, is the number of HCONs (hours-confirming coverages) for the lune bin in which the source resides. This is crudely estimated from Figure I.C.1 of the IRAS Explanatory Supplement, (ES: Beichman et al., 1988, NASAR, 1190, 1). Sources needed at least 2 HCON detections to enter the IRAS PSC. The estimated completeness at 0.6 - 0.65 Jy in 2-HCON area is only 82% according to Section XII.A.4 of the ES. A value of 3 indicates 3 or more HCONs for the lune bin.
The ratio of the 100-um to 60-um flux for the source, where a negative value means there was only an upper limit for the source flux at 100-um.
The number of the lune bin in which the source resides.
The HEASARC Browse object classification, based the value of the optical_class_code parameter.