IRAS Serendipitous Survey Catalog Format[Adapted from the Explanatory Supplement to the IRAS Serendipitous Survey Catalog] The SSC is distributed as an ASCII file, with each source occupying three or more 80-byte records, as described in Table 1. Table 1. Format of the SSC Start Name Description Units Format Byte 00 NAME Source Name 11A1 11 HOUR Right Ascension 1950 Hours I2 13 MINUTE Right Ascension 1950 Minutes I2 15 SECOND Right Ascension 1950 Deci-seconds I3 18 DSIGN Declination Sign ± 1A1 19 DECDEG Declination 1950 Degree I2 21 DECMIN Declination 1950 Arcmin I2 23 DECSEC Declination 1950 Arcsec I2 25 SPARE 1 spare byte 1A1 30 FLUX Averaged Non-color Jansky 4E9.3 corrected flux (1E-26 W m-2 Hz-1) densities (1 value per band) 66 FQUAL Flux Density Quality 4I1 (1 value per band) 70 RGRID Reference Grid Number I5 76 SPARE 9 spare bytes 9A1 ---- New Record ---- 80 RELUNC Percent Relative Flux 4I3 Density Uncertainties (1 value per band) 92 TLSNR 10x Local Singal-to-Noise 4I4 Ratio (1 value per band) 108 CC Point Source Correlation 4A1 Coefficient (1 value per band) 112 TRFLUX 10 x F(c)/F(r) 4I2 120 POSDRS12 Right Ascension Delta ± 1A1 Sign 121 POSDR12 Right Asension Delta Arcsec I3 124 POSDDS12 Declination Delta Sign ± 1A1 125 POSDD12 Declination Delta Arcsec I3 128 Repeat for 25 micron band 136 Repeat for 60 micron band 144 Repeat for 100 micron band 152 PNEARC Number of Sources in 4I1 Confusion Window (1 value per band) 156 NID Number of Positional I2 Associations 158 IDTYPE Type of Object I1 159 SPARE 1 spare byte 1A1 ---- New Record ---- 160 CATNO Catalog Number I2 162 SOURCE Source ID 15A1 177 IDTYPE Source Type/Spectral Class 5A1 182 RADIUS Radius Vector from SSC Arcsec I3 Position to Association 185 POS Position Angle from SSC Degree I3 Position to Association (E of N) 188 FIELD1 Object Field #1 Catalog I4 dependent 192 FIELD2 Object Field #2 Catalog I4 dependent 196 FIELD3 Object Field #3 Catalog I4 dependent 200-240 Continuation of Associations in Blocks of 40 Bytes . . . The following are brief descriptions of the individual entries in the table above.
Table 2. Format of Overlapping Fields File Start Name Description Units Format Byte 00 GRID0 Prime Ref. Grid I5 05 SPARE 1 spare byte 1A1 06 GRID1 Overlapping Field #1, I5 Ref. Grid 11 SPARE 1 spare byte 1A1 12 AOVLP1 Overlapping Sky Coverage Arcmin^2 I4 16-2 Repeat of 5-15 for Overlapping Field #2 17-27 Repeat of 5-15 for Overlapping Field #3 . . . 60-70 Repeat of 5-15 for Overlapping Field #5 71-79 SPARE 9 spare bytes 9A1 ---- New Record ---- 80-85 SPARE 6 spare bytes 6A1 86-96 Repeat of 5-15 for Overlapping Field #6 . . . The quantities in the Overlapping Fields List are as follows:
The format is repeated for each additional grid overlapping with GRID0. If more than 5 grids overlap with GRID0, they are listed in succeeding records, as necessary; the first six bytes of each of these additional records begins with a string of 6 spaces. |