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II/125 IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)
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IRAS Catalog of Point Sources, Version 2.0
Joint IRAS Science Working Group
<IPAC (1986)>
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ADC_Keywords: Photometry, infrared ; Infrared sources ; Surveys
Mission_Name: IRAS
Description:
This is a catalog of some 250,000 well-confirmed infrared point
sources observed by the Infrared Astronomical Satellite, i.e., sources
with angular extents less than approximately 0.5, 0.5, 1.0, and 2.0
arcmin in the in-scan direction at 12, 25, 60, and 100 microns,
respectively. Positions, flux densities, uncertainties, associations
with known astronomical objects and various cautionary flags are given
for each object. While two other complementary data sets - the Working
Survey Data Base and a file of rejected sources - give information
about point-like sources, the information available in the Point
Source Catalog should satisfy almost all users. Away from confused
regions of the sky, the survey is complete to about 0.4, 0.5, 0.6, and
1.0 Jy at 12, 25, 60, and 100 microns. Typical position uncertainties
are about 2 to 6 arcseconds in-scan and about 8 to 16 arcseconds
cross-scan. The processing steps applied to detect and confirm point
sources, and the positional and photometric error analyses are
described in the IRAS Catalogs and Atlases Explanatory Supplement; the
catalog format is described in Chapter X. The sources appear in order
of increasing (1950.0) right ascension.
References:
IRAS Catalogs and Atlases Explanatory Supplement, 1988, ed. Beichman C.,
Neugebauer G., Habing H.J., Clegg P.E., and Chester T.J.
(Washington, DC: GPO), NASA RP-1190, vol 1
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
psc.doc 79 1091 CD-ROM Documentation
main.dat 157 245889 IRAS Point Sources
assoc.dat 58 142228 Associations
meaning.txt 80 235 Details of association catalogues
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See also:
II/126 : IRAS Serendipitous Survey Catalog
II/156 : IRAS Faint Source Catalog, |b| > 10, Version 2.0
VII/91 : IRAS Asteroid and Comet Survey (1986)
II/190 : IRAS Minor Planet Survey data base (Tedesco, 1992)
III/197 : IRAS Low Resolution Spectra (LRS) (1987)
III/170 : IRAS Point Source Identifications (MacConnell, 1993)
VII/73 : IRAS Small Scale Structure Catalog
VII/113 : Catalogued Galaxies and QSOs observed in IRAS Survey,
Version 2 (IPAC 1989)
II/174 : IRAS 2Jy Redshift Survey Data File
J/A+AS/100/473 : IRAS pointed observations data (Assendorp+, 1993)
J/AJ/109/2318 : Extragalactic IRAS Sources (Condon+ 1995)
J/A+AS/99/31 : Identification of C stars in IRAS (Guglielmo+ 1993)
J/A+AS/113/51 : Catalogue of associations IRAS and S stars (Chen+, 1995)
J/ApJ/411/188 : Classification of bright IRAS variables (Allen+ 1993)
J/A+AS/80/149 : CO observations of IRAS Sources (Wouterloot+ 1989)
J/A+AS/98/589 : H2O, OH, CH3OH and CO obs. of IRAS Sources
(Wouterloot+ 1993)
J/A+AS/93/121 : CO emission from a sample of IRAS sources (Nyman+ 1992)
J/A+AS/90/327 : 1612MHz OH survey of IRAS point sources
(te Lintel Hekkert+ 1991)
II/184 : Catalog of Infrared observations, 3rd Edition (Gezari+ 1993)
Byte-by-byte Description of file: main.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- IRAS IRAS source name
12- 13 I2 h RAh Hours RA, equinox 1950.0, epoch 1983.5
14- 15 I2 min RAm Minutes RA, equinox 1950.0, epoch 1983.5
16- 18 I3 ds RAds Seconds RA, equinox 1950.0, epoch 1983.5
19 A1 --- DE- Sign Dec, equinox 1950.0, epoch 1983.5
20- 21 I2 deg DEd Degrees Dec, equinox 1950.0, epoch 1983.5
22- 23 I2 arcmin DEm Minutes Dec, equinox 1950.0, epoch 1983.5
24- 25 I2 arcsec DEs Seconds Dec, equinox 1950.0, epoch 1983.5
26- 28 I3 arcsec Major Uncertainty ellipse major axis
29- 31 I3 arcsec Minor Uncertainty ellipse minor axis
32- 34 I3 deg PosAng Uncertainty ellipse position angle (1)
35- 36 I2 --- NHcon Number of times observed
37- 45 E9.3 Jy Fnu_12 Average non-color corrected flux density,
12um
46- 54 E9.3 Jy Fnu_25 Average non-color corrected flux density,
25um
55- 63 E9.3 Jy Fnu_60 Average non-color corrected flux density,
60um
64- 72 E9.3 Jy Fnu_100 Average non-color corrected flux density,
100um
73 I1 --- FQual_12 Flux density quality, 12um
74 I1 --- FQual_25 Flux density quality, 25um
75 I1 --- FQual_60 Flux density quality, 60um
76 I1 --- FQual_100 Flux density quality, 100um
77- 78 I2 --- NLRS Number of significant LRS spectra
79- 80 A2 --- LRSChar Characterization of averaged LRS spectrum
81- 83 I3 --- Relunc_12 Percent relative flux den. uncertainty, 12um
84- 86 I3 --- Relunc_25 Percent relative flux den. uncertainty, 25um
87- 89 I3 --- Relunc_60 Percent relative flux den. uncertainty, 60um
90- 92 I3 --- Relunc_100 Percent relative flux den. uncertainty,
100um
93- 97 I5 --- TSNR_12 10x minimum signal-to-noise ratio, 12um
98-102 I5 --- TSNR_25 10x minimum signal-to-noise ratio, 25um
103-107 I5 --- TSNR_60 10x minimum signal-to-noise ratio, 60um
108-112 I5 --- TSNR_100 10x minimum signal-to-noise ratio, 100um
113 A1 --- CC_12 Point source correlation coefficient, 12um
114 A1 --- CC_25 Point source correlation coefficient, 25um
115 A1 --- CC_60 Point source correlation coefficient, 60um
116 A1 --- CC_100 Point source correlation coefficient, 100um
117-118 I2 --- Var Percent likelihood of variability
119 A1 --- Disc Discrepant fluxes flag, 1 per band,
hex encoded
120 A1 --- Confuse Confusion flags, 1 per band, hex encoded
121 I1 --- PNearH Number of nearby hours-confirmed point
sources
122 I1 --- PNearW Number of nearby weeks-confirmed point
sources
123 I1 --- SES1_12 Nearby seconds-confirmed small ext. src.,
12um
124 I1 --- SES1_25 Nearby seconds-confirmed small ext. src.,
25um
125 I1 --- SES1_60 Nearby seconds-confirmed small ext. src.,
60um
126 I1 --- SES1_100 Nearby seconds-confirmed small ext. src.,
100um
127 I1 --- SES2_12 Nearby weeks-confirmed small ext. src., 12um
128 I1 --- SES2_25 Nearby weeks-confirmed small ext. src., 25um
129 I1 --- SES2_60 Nearby weeks-confirmed small ext. src., 60um
130 I1 --- SES2_100 Nearby weeks-confirmed small ext. src.,
100um
131 A1 --- HSDFlag High source density bin flag, hex encoded
132 I1 --- Cirr1 Number of nearby 100 micron only WSDB
sources
133 I1 --- Cirr2 100 micron sky brightness ratio to flux den.
(2)
134-136 I3 MJy/sr Cirr3 Total 100 micron sky surface brightness
137-138 I2 --- NID Number of positional associations
139 I1 --- IDType Type of object
140-141 I2 --- MHcon []? Possible number of HCONs
142-145 I4 10-3 FCor_12 []? Flux correction factor applied
146-149 I4 10-3 FCor_25 []? Flux correction factor applied
150-153 I4 10-3 FCor_60 []? Flux correction factor applied
154-157 I4 10-3 FCor_100 []? Flux correction factor applied
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Note (1): Measured in degrees east of north between the major axis of the
ellipse and the local equatorial meridian.
Note (2): The spatially filtered 100 micron sky brightness ratio to flux
density of point source (see Explanatory Supplement)
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Byte-by-byte Description of file: assoc.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- IRAS IRAS source name
12- 17 I6 --- RecNo Main data table record number for IRAS source
19- 20 I2 --- CatNum Catalog number (1)
21- 35 A15 --- Source Source identification
36- 40 A5 --- Type Source type or spectral class
41- 43 I3 arcsec Radius Radius vector from IRAS source to association
44- 46 I3 deg Pos Position angle (E of N), IRAS source to
object
47- 50 I4 --- Field1 Object data field 1, catalog dependent
51- 54 I4 --- Field2 Object data field 2, catalog dependent
55- 58 I4 --- Field3 Object data field 3, catalog dependent
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Note (1): See Table X.B.4 in the "IRAS Catalogs and Atlases Explanatory
Supplement" also included in the file "psc.doc" file.
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Historical Notes:
The catalogue is also available on the CD-ROM
"Selected Astronomical Catalogues", Volume 1, 1992,
Astronomical Data Center, NASA, directory photom/iraspsc
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(End) [CDS] 29-Jan-1994