1991ULeid.T00M....Wieringa

1 name Name of source (char8, example: '76W0771*') 2 freq MHz Frequency of source detection in MHz (int, example: 327 or 608) 3 ra_1950 radians B1950 Right Ascension (in radians) (real, example: 2.328327) 4 ra_1950_deg degrees B1950 Right Ascension (in degrees) (real, example: 133.403290) 5 ra_err seconds Error in RA (real, example: 0.39) 6 dec_1950 radians B1950 Declination (in radians) (real, example: 69.880000) 7 dec_1950_deg degrees B1950 Declination (in degrees) (real, example: 1.220000) 8 dec_err arcsec Error in RA (real, example: 0.39) 9 flux mJy Flux Density at frequency listed (real, example: 418.11) 10 flux_err mJy Error on flux density (real, example: 14.00) 11 res Flag indicating whether source is resolved (char1, example: 'U' or 'R' or 'E') 12 limit Flag indicating size is upper limit (char1, example: '<') 13 maj_axis arcsec Major axis (FWHM) of fitted gaussian (real, example: 73.2) 14 maj_err arcsec Error on major axis (real, example: 5.2) 15 pos_ang degrees Position angle in degrees (N through E) (int, example: 136) 16 pos_err degrees Error on PA (int, example: 5) 17 min_axis arcsec Minor axis (FWHM) of fitted gaussian (real, example: 74.3) 18 ratio Ratio of total flux to fitted peakflux (real, example: 1.6) 19 snr Peak signal to noise ratio of source in map (real, example: 233.72) 20 atten Primary beam attenuation (>1) (real, example: 2.87) 21 weight Statistical weight for use in source counts (real, example: 1.0)

Sources detected at both frequencies have corresponding numbers in the 327 MHz (92cm) and 608 MHz (50cm) lists, but components of multiple sources do not necessarily correspond between the two frequencies. Also in some cases one or more components may not be detected at the other frequency. The Westerbork survey numbers are as follows:

64W2: Lynx, 327 MHz only (this field has been mapped at this frequency before by M.J.A. Oort (thesis), with a 2 appended to the W to indicate the revised list), numbers do not correspond because the present survey is more sensitive. 69W : Draco, a survey of 2 overlapping fields at 327 MHz and 6 fields at 608 MHz. 70W : Umi, 327 MHz only, one field. 75W : OH471, one 327 MHz field and three 608 MHz fields 76W : Cam, one 327 MHz field and three 608 MHz fieldsExample (name) (char8): '76W0771*' 2. COLUMN freq This column indicates whether the source was observed at 327 or 608 MHz.

Example (freq) (int): 327 or 608

Example (ra_1950) (real): 2.328327

Example (ra_1950_deg) (real): 133.403290

Example (dec_1950) (real): 69.880000

Example (dec_1950_deg) (real): 1.220000

Example (ra_err) (real): 0.39

Example (dec_err) (real): 0.39

Example (flux) (real): 418.11

Example (flux_err) (real): 14.00

U: unresolved

R: resolved, fitted gaussian parameters follow

E: extended, multiple components found and given on subsequent lines)

Example (res) (char1): 'U' or 'R' or 'E'

Example (limit) (char1): '<' 8. COLUMNS maj_axis maj_err min_axis These columns give information on the size of the source. The major axis (FWHM) of the fitted gaussian (for resolved sources) or maximum component separation (for extended sources) is given (in arcsec) in the maj_axis column. The error in major axis (in arcsec) is given in the maj_err column. The minor axis (FWHM) of the fitted gaussian (in arcsec) is given in the min_axis column.

Example (maj_axis) (real): 73.2

Example (maj_err) (real): 5.2

Example (min_axis) (real): 74.3

Example (pos_ang) (int): 136 Example (pos_err) (int): 5

Example (ratio) (real): 1.6 11. COLUMN snr This column gives the peak signal to noise ratio of the source.

Example (snr) (real): 233.72

Example (atten) (real): 2.87

Example (weight) (real): 1.0

Wieringa, M.H., 1993, Bull. Inf. CDS 43, 17. Origin submitted by M.H. Wieringa

10-Aug-1994

Columns 21 Rows 5850

For catalog content: C. Stern Grant, SAO; stern@cfa.harvard.edu (8/94)