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II/126   IRAS Serendipitous Survey Catalog     (IPAC 1986)

IRAS Serendipitous Survey Catalog Kleinmann S.G., Cutri R.M., Young E.T., Low F.J., Gillett F.C. <Joint IRAS Science W.G. (1986)> =1986SSC...C......0K
ADC_Keywords: Photometry, infrared ; Infrared sources ; Surveys Mission_Name: IRAS Description: This is a catalog of 12, 25, 60 and 100 micron photometric observations of 43,866 point-like sources detected fortuitiously in the Infrared Astronomical Satellite 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 Point Source Catalog (PSC); about three-fourths of the Serendipitous Survey Catalog (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. The SSC data processing, the catalog format, and an analysis are given in the Explanatory Supplement to the IRAS Serendipitous Survey Catalog. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file ssc.doc 80 106 Information about interpretation of catalog entries, from the Explanatory Supplement to the IRAS Serendipitous Survey Catalog. sources.dat 159 43886 Properties of the point sources identified assoc.dat 56 29583 Information about positional associations with sources in other catalogs meaning.txt 80 235 Details of association catalogues headers.dat 150 1813 Information about the reference and confirming grids (observations) in which point sources were identified overlap.dat 16 2149 Overlapping fields (Appendix A)
See also: II/125 : IRAS catalogue of Point Sources (IRAS/PSC), Version 2.0 (IPAC 1986) II/156 : IRAS Faint Source Catalog, |b| > 10, Version 2.0 (Moshir+ 1989) VII/73 : IRAS Small Scale Structure Catalog (Helou+ 1985) Byte-by-byte Description of file: headers.dat
Bytes Format Units Label Explanations
1- 13 A13 --- FNAME Field Name (2) (1) 14- 18 I5 --- RGRID Reference Grid No. (2), has the lower 60 um median noise. 19- 21 I3 d RDATE Observation Date (JD 2445000+) of RGRID (2) 22- 26 I5 --- CGRID Confirming Grid No. (2) 27- 29 I3 d CDATE Observation Date (JD 2445000+) of CGRID (2) 30 A1 --- MACRO Macro Type (2) (3) 31- 33 I3 deg GLON Galactic Longitude (2) 34- 36 I3 deg GLAT Galactic Latitude (2) 37- 40 I4 arcsec dRA R.A. Difference between Grid Centers 41- 44 I4 arcsec dDE Dec. Difference between Grid Centers 45- 48 I4 deg RGPA Reference Grid Scan Direction (E of N) 49- 52 I4 deg CGPA Confirming Grid Scan Direction (E of N) 53- 55 I3 0.01deg2 EFFAREA Effective Area of Grid Overlap (2) covered by both the reference and confirming grids (in 0.01 square degrees). 56- 57 I2 --- RUNDF No. of additional grid pairs with Overlap > 5% (2) 81- 85 I5 mJy RNOISE12 Median Noise of Ref. Grid (12um) 86- 90 I5 mJy RNOISE25 Median Noise of Ref. Grid (25um) 91- 95 I5 mJy RNOISE60 Median Noise of Ref. Grid (60um) 96-100 I5 mJy RNOISE100 Median Noise of Ref. Grid (100um) 101-105 I5 mJy CNOISE12 Median Noise of Conf.Grid (12um) 106-110 I5 mJy CNOISE25 Median Noise of Conf.Grid (25um) 111-115 I5 mJy CNOISE60 Median Noise of Conf.Grid (60um) 116-120 I5 mJy CNOISE100 Median Noise of Conf.Grid (100um) 121-123 I3 --- NSOURC12 Number of Confirmed Sources (12um) 124-126 I3 --- NSOURC25 Number of Confirmed Sources (25um) 127-129 I3 --- NSOURC60 Number of Confirmed Sources (60um) 130-132 I3 --- NSOURC100 Number of Confirmed Sources (100um) 133-135 I3 --- NCONF12 Number of Confused Confirmations (12um) (2) 136-138 I3 --- NCONF25 Number of Confused Confirmations (25um) (2) 139-141 I3 --- NCONF60 Number of Confused Confirmations (60um) (2) 142-144 I3 --- NCONF100 Number of Confused Confirmations (100um) (2) 145-147 I3 --- CIRRUS Number of 100 um only Confirmed Sources (2) 148-150 I3 --- NMERGE Number of Merged Sources, i.e. number of source records following the field header.
Note (1): Fields are listed in order of increasing Right Ascension of the Reference Grid center. The IRAS/SSC field name is the position of the center of the reference grid, given in the form hhmmssSddmmss. Note (2): This quantity is listed in the printed version of the catalog. Note (3): Macro code is (Table II.A of "Explanations") ------------------------------------------------------ Code Name Scans Length Cross-step SNR Gain arcmin arcmin improvement ------------------------------------------------------ A DPS02B 6 96 0.3 4.8 B DPS05B 3 360 1.0 3.5 C DPS52B 6 96 0 4.8 D DPS55B 3 360 0 3.5 E DPS60B 4 60 0.8 4.0 F DPS60D 5 48 0.4 4.4 G DPS61C 12 48 0.2 6.9 H DPS61D 15 48 0.2 7.7 I DPS62D 9 96 0.4 6.0 J DPS63D 3 96 0.8 3.5 K DPS60C 5 48 0.4 4.4 L TPS52B 6 96 0 4.8 M DPS60M 5 48 0.4 4.4 ------------------------------------------------------
Byte-by-byte Description of file: sources.dat
Bytes Format Units Label Explanations
1- 11 A11 --- IRAS IRAS/SSC Source Name (1) 12- 13 I2 h RAh Right Ascension 1950 (hours) 14- 15 I2 min RAm Right Ascension 1950 (minutes) 16- 18 I3 0.1s RAds Right Ascension 1950 (seconds) 19 A1 --- DE- Declination 1950 (Sign) 20- 21 I2 deg DEd Declination 1950 (degrees) 22- 23 I2 arcmin DEm Declination 1950 (minutes) 24- 25 I2 arcsec DEs Declination 1950 (seconds) 27- 29 I3 --- ANGLE Position Angle of SSC Source Error Box expressed in degrees East of North. 31- 39 E9.3 Jy FLUX12 Averaged Non-color Corrected Flux Densities(2) 40- 48 E9.3 Jy FLUX25 Averaged Non-color Corrected Flux Densities(2) 49- 57 E9.3 Jy FLUX60 Averaged Non-color Corrected Flux Densities(2) 58- 66 E9.3 Jy FLUX100 Averaged Non-color Corrected Flux Densities(2) 67 I1 --- FQUAL12 Flux Density Quality (2) (5) 68 I1 --- FQUAL25 Flux Density Quality (2) (5) 69 I1 --- FQUAL60 Flux Density Quality (2) (5) 70 I1 --- FQUAL100 Flux Density Quality (2) (5) 71- 75 I5 --- RGRID Reference Grid Number 81- 83 I3 % RELUNC12 ? Percent Relative FLUX12 Uncertainty (2) 84- 86 I3 % RELUNC25 ? Percent Relative FLUX12 Uncertainty (2) 87- 89 I3 % RELUNC60 ? Percent Relative FLUX12 Uncertainty (2) 90- 92 I3 % RELUNC100 ? Percent Relative FLUX12 Uncertainty (2) 93- 96 I4 --- TLSNR12 ? 10x Local Signal-to-Noise Ratio 97-100 I4 --- TLSNR25 ? 10x Local Signal-to-Noise Ratio 101-104 I4 --- TLSNR60 ? 10x Local Signal-to-Noise Ratio 105-108 I4 --- TLSNR100 ? 10x Local Signal-to-Noise Ratio 109 A1 --- CC12 Point Source Correlation Coefficient (2) (3) 110 A1 --- CC25 Point Source Correlation Coefficient (2) (3) 111 A1 --- CC60 Point Source Correlation Coefficient (2) (3) 112 A1 --- CC100 Point Source Correlation Coefficient (2) (3) 113-114 I2 --- TRFLUX12 ? 10x Fc/Fr (confirmed/reference) (6) 115-116 I2 --- TRFLUX25 ? 10x Fc/Fr (confirmed/reference) (6) 117-118 I2 --- TRFLUX60 ? 10x Fc/Fr (confirmed/reference) (6) 119-120 I2 --- TRFLUX100 ? 10x Fc/Fr (confirmed/reference) (6) 121-124 I4 arcsec dRA12 ? Right Ascension Delta (12um) 125-128 I4 arcsec dDE12 ? Declination Delta (12um) 129-132 I4 arcsec dRA25 ? Right Ascension Delta (25um) 133-136 I4 arcsec dDE25 ? Declination Delta (25um) 137-140 I4 arcsec dRA60 ? Right Ascension Delta (60um) 141-144 I4 arcsec dDE60 ? Declination Delta (60um) 145-148 I4 arcsec dRA100 ? Right Ascension Delta (100um) 149-152 I4 arcsec dDE100 ? Declination Delta (100um) 153 I1 --- PNEARC12 ? Number of Sources in Confusion Window (2)(4) 154 I1 --- PNEARC25 ? Number of Sources in Confusion Window (2)(4) 155 I1 --- PNEARC60 ? Number of Sources in Confusion Window (2)(4) 156 I1 --- PNEARC100 ? Number of Sources in Confusion Window (2)(4) 157-158 I2 --- NID Number of Positional Associations (2) 159 I1 --- IDTYPE Type of Object (2)
Note (1): Sources are listed in order of increasing Right Ascension within each field. Note (2): This quantity is listed in the printed version of the SSC. Note (3): the Point Source Correlation Ceofficients are between 70-100%. These are encoded as alphabetic characters with A=100, B=99..Z=75-70 (1 value per band). The quoted correlation coefficients come from the reference or confirming grids, whichever is higher, for high quality sources. Note (4): In regions of high source density, the Pointed Observation source extraction process, as well as the Serendipitous Survey Confirmation and Band Merging processing, can result in degraded positions and incorrectly band merged sources. PNEARC is 1-(number of confirmed sources in the confusion and band merge window). Any value greater than zero is indicative of potential confusion in the processing and the resulting source information should be examined carefully, e.g. by inspection of the grids in question. Note (5): Qualities: 3=high-quality, 2=moderate quality, 1=upper limit Note (6): SSC sources can have flux density ratios 0.5 < Fc/Fr < 2.0.
Byte-by-byte Description of file: assoc.dat
Bytes Format Units Label Explanations
1- 2 I2 --- CatNo Catalog Number (1) 3- 17 A15 --- Source Source ID 18- 22 A5 --- Type Source Type/Spectral Class (2) 23- 25 I3 arcsec Radius Radius Vector from SSC Position to Association 26- 28 I3 deg PosAngle Position Angle from SSC Position to Association (E of N) 29- 32 I4 --- Field1 Object Field #1 Dependent (3) 33- 36 I4 --- Field2 Object Field #2 Dependent (4) 37- 40 I4 --- Field3 Object Field #3 Dependent (5) 41- 51 A11 --- IRAS ! SSC Name association (6) 52- 56 I5 --- RGRID SSC Name association (6)
Note (1): For associations with the IRAS/PSC II/125, this value is 41. For other associations, see details in file "meaning.txt". Note (2): For associations with the IRAS/PSC II/125 (i.e. CATNO=41), this field is left blank. For other associations, see details in "meaning.txt". Note (3): For associations with the IRAS/PSC II/125 (i.e. CATNO=41), this value is a flag indicating the bands in which the source was detected with medium or high quality; it is encoded as indicated in the PSC Supplement Table X.B.2 (or'ed number values of 1 (12um), 2 (25um), 4(60um) and 8(100um)). For other associations, see details in "meaning.txt". Note (4): For associations with the IRAS/PSC II/125 (i.e. CATNO=41), this value is the PSC 2.0 Flux Density in the shortest (first) wavelength band in which it was detected. Flux Densities higher than 10 Jy are encoded 9999. For other associations, see details in "meaning.txt". Note (5): For associations with the IRAS/PSC II/125 (i.e. CATNO=41), this value is the PSC 2.0 Flux Density in the second wavelength band in which it was detected. Flux Densities higher than 10 Jy are encoded 9999. For other associations, see details in "meaning.txt". Note (6): These fields are a repetition of bytes 1-11 and 71-75 of "sources" table.
Byte-by-byte Description of file: overlap.dat
Bytes Format Units Label Explanations
1- 5 I5 --- RGRID Reference Grid No 7- 11 I5 --- GRID1 Overlapping grid no., >5% overlap with Reference Grid 13- 16 I4 arcmin2 OVLP1 Overlapping area
Reference(s): Kleinmann S.G., Cutri R.M., Young E.T., Low F.J., and Gillett F.C. 1986, Explanatory Supplement to the IRAS Serendipitous Survey Catalog (Pasadena: JPL) 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 Young E.T., Neugebauer G., Kopan E.L., Benson R.D., Conrow T.P., Rice W.L., and Gregorich D.T. 1985, A User's Guide to IRAS Pointed Observation Products, IPAC Preprint PRE-008N
(End) Francois Ochsenbein [CDS], Seth Digel [SSDOO/ADC] 14-Aug-1997
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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