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User's Manual - Catalog of Infrared Observations
[Catalog Description] [Journal List] [Database Contents] [Flux Units] [Cautions]
Scientific Journals Searched (1965-1998, complete): 757 Astronomical Journal (A.J.) 1355 Astronomy and Astrophysics (Astr. & Ap.) 171 Astronomy and Astrophysics Suplement (Astr. & Ap. Suppl.) 2037 Astrophysical Journal (Ap.J.) 866 Astrophysical Journal Letters (Ap.J. Letters) 138 Astrophysical Journal Supplement Series (Ap.J. Suppl.) 1045 Monthly Notices of the Royal Astronomical Society (M.N.R.A.S.) 243 Publications of the Astronomical Society of the Pacific (P.A.S.P.) Infrared Catalogs: Infrared Astronomical Satellite (IRAS) Point Source Catalog, Version 2.0 (880001) IRAS Small Scale Structure Catalog (851123) Caltech Two-Micron Sky Survey (690001) Revised AFGL Four-Color Infrared Sky Survey Catalog (830610) Equatorial Infrared Catalog, version 2 (90001) Far Infrared Sky Survey Experiment (830201) Other Journals Searched (all years not complete): Annals d'Astrofisica (Ann. d'Ast.) Astrophysics and Space Science (Ap. & Sp. Sci.) Astrophysical Letters (Ap. Letters) Astrofizika Communications of the Lunar and Planetary Laboratory (Comm. L.P.L.) Earth and Extraterrestrial Sciences (Earth and Ext. Sci.) I.A.U. Circulars (I.A.U. Circ.) Chinese Astronomy (Chi. Ast.) Comments on Astrophysics (Comm. on Ap.) Memoirs of the Royal Astronomical Society (Mem. R.A.S.) Monthly Notices of the Astronomical Society of South Africa (M.N.A.S.S.A.) Nature and Nature Physical Sciences Observatory Proceedings of the Astronomical Society of Australia (Proc. A.S.A.) Publications of the Astronomical Society of Japan (P.A.S.J.) Science Soviet Astronomy (Sov. Ast.) Soviet Astronomy Letters (Sov. Ast. Letters) Tokyo Astronomical Bulletin (Tokyo Ast. Bul.) Zeitschrift fur Astrophysik (Zeit. fur Ap.)To top of page
All of the on-line data, plus spectral ranges and IRAS Point Source Catalog fluxes for CIO sources, along with a chronological reference list, are contained in downloadable files. Please see the Download Page for more information.
I. MAIN CATALOG Column Description NAME Source name as given in article RA Right Ascension (1950) DEC Declination (1950) LAMBDA Wavelength in microns FLUX Source flux and associated unit (See FLUX below) BEAM Aperture size (see BEAM below) BIBLIO Bibliographic reference code (See BIBLIO below) PSC NAME Source name in the IRAS Point Source Catalog (PSC) PSC FLUX Order-of-magnitude PSC flux at 12, 25, 60, and 100 microns (See IRAS below) PSC CODE PSC quality codes for each wavelength (See IRAS below)FLUX (Cols. 45-49)-- The infrared flux is listed in the same units as published by the original observers. The units have been given one- or two-letter abbreviations (see UNITS file). To protect the integrity of the database, no attempt has been made to convert these different units of infrared flux into a more homogeneous system. Fortunately, about 95% of the flux observations in the Catalog have units of "magnitudes" or "Janskys," or have commonly used units (B, E, F, I, X). The remaining 2% of the entries are in less common units, but these are dimensionally equivalent to one of the more commonly used units. In general, infrared magnitudes are calibrated with respect to the flux density of Alpha Lyr (10^4 K blackbody), which is defined as being 0 magnitude at all infrared wavelengths (see Gillett et al., 1971, Ap.J., 164, 83; Gehrz and Woolf, 1971, Ap.J., 165, 185).
The following letters may be appended to the flux unit: V = variable or mean of several values; L = lower limit (detector saturated); U = upper limit; E = editor determined flux from maps, spectra, or other material in the article not in tabulated form.
When spectral data (S) are listed, only the starting wavelength of the spectrum appears in the Lambda(microns) column. Starting and ending wavelengths of published spectra are given in the spectra.dat file.
BEAM -- The angular beam size of the observation is presented in degrees (D), arcminutes (M), or arcseconds (S). If no beam size information was given in the original reference, a dash (-) is entered. In addition to being a factor in source brightness calculation, the beam size can be used as an aid in determining positional coincidences and identifications with other sources, and as a first-order indication of positional accuracy.
BIBLIO (Cols. 52-57)-- The bibliographic reference code identifies the original journal article for each observation in the Catalog, keyed to the chronological refchron.dat file. The bibliographic reference number is made up of the year and month of publication, and a sequential number is assigned to the article (for example, "790104" breaks down into 79-01-04, where 79 = 1979, 01 = January, and 04 = article randomly assigned as #4 in that month). References that do not indicate the month of publication have "00" in the month field.
IRAS (Cols. 58-68)-- The large number of sources (245,000) in the IRAS Point Source Catalog (PSC) would clearly overwhelm the CIO. Criteria had to be established to include IRAS data without changing the basic nature of the Catalog. Order-of-magnitude IRAS PSC fluxes have been included in the main Catalog files for all CIO sources which were also detected in the IRAS PSC Version 2.0 (about 27,000 of the individual sources listed in this edition of the CIO). The four digits used represent the approximate logarithm of the flux density in each of the four IRAS bands. For example, "0012" means that the source listed has fluxes of roughly 1, 1, 10, and 100 Janskys in IRAS bands 1, 2, 3, and 4 (12, 25, 60, and 100 microns), respectively. The numbers used in this notation are specifically 0 = < 5 Jy, 1 = 5-50 Jy, 2 = 50-500 Jy, 3 = 500-5000 Jy, etc. Exact values for the PSC fluxes of CIO sources can be obtained from the PSC files, which list positions and fluxes from version 2.0 of the Point Source Catalog (see below). The PSC quality codes are: blank = high; : = moderate; U = upper limit; S = saturated.
II. SOURCE ATLAS Contents Description NAME Source name RA Right Ascension (1950) DEC Declination (1950) III. REFERENCESReferences are listed alphabetically by first author's name and include journal name, volume, page, and article title.
Note: a caret is used to indicate exponents.
Abbreviation Definition No. of Journals Using Unit A normalized magnitude 29 B 10^(-19) W m^(-2) Hz^(-1) Sr^(-1) 47 C magnitude, derived from color 558 D diameter measurement 187 E erg sec^(-1) cm^(-2) Sr^(-1) 78 F 10^(-16) W cm^(-2) micron^(-1) 134 G 10^(-14) ergs sec^(-1) cm^(-2) 186 H log(ergs sec^(-1) cm^(-2) Hz^(-1)) 14 I 10^(-9) W cm^(-2) micron^(-1) Sr^(-1) 16 J 10^(-26) W m^(-2) Hz^(-1) = 1 Jansky 1185 JA Janskys arcsec^(-2) 2 K log(10^(-26) W m^(-2) Hz^(-1)) 20 L log(W m^(-2) Hz^(-1)) 12 M magnitude 2572 MA magnitudes arcsec^(-2) 52 N log(ergs sec^(-1) cm^(-2) micron^(-1)) 6 P polarization data 308 Q log(10^(-3) Jansky) 6 R log(W cm^(-2) micron^(-1)) 8 S spectral data 1809 T -2.5 log(ergs sec^(-1) cm^(-2) Hz^(-1)) - 48.60 9 U upper limit V variable W 10^(-14) W m^(-2) 179 X 10^(-18) W cm^(-2) 229 Y relative line intensity 50 Z 10^(-21) W cm^(-2) micron^(-1) arcsec^(-2) 5To top of page
Last modified: November 30, 2000