VIII/1A The 3C and 3CR Catalogues (Edge+ 1959-1962)
A Survey of Radio Sources at a Frequency of 159Mc/s Edge D.O., Shakeshaft J.R., McAdam W.B., Baldwin J.E., Archer S. <Mem. Roy. Astron. Soc. 68, 37 (1959)> =1959MmRAS..68...37E The Revised 3C Catalogue of Radio Sources Bennett A.S. <Mem. Roy. Astron. Soc. 68, 163 (1962)> =1962MmRAS..68..163B
ADC_Keywords: Radio sources ; Surveys Description: The 3C Catalog is the result of observations with the Cambridge four-element interferometer at a frequency of 159MHz, and contains 471 sources between declinations -22 and +71degrees, with a flux density larger than 8Jy. The Revised version of the 3C (3CR) is based on new observations at a frequency of 178MHz, and represents a survey of all sources North of -05degrees with a flux density brighter than 9Jy, except in the areas near the ridge of galactic emission. The original numbering system has been preserved. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file 3c.dat 128 471 3C catalog of radio sources (1959) 3cr.dat 208 328 The revised 3C catalogue of radio sources (1962)
See also: J/PASP/97/932 : 3CR Source Identifications (Spinrad 1985) Byte-by-byte Description of file: 3c.dat
Bytes Format Units Label Explanations
1- 3 I3 --- 3C [1,471] 3C source designation 4 A1 --- u_3C [)] sources with open doubt (1) 5 A1 --- f_3C [+] observed in both 3C(a) and 3C(c) surveys 6 A1 --- q_3C [*] sources with considerable confidence 7 A1 --- n_3C [AB] Analysis flag (2) 10- 12 A3 --- f_RAs [-<> ] Possible lobe confusion on R.A. (3) 13- 14 I2 h RAh Right ascension (1950.0) 16- 17 I2 min RAm Right ascension (1950.0) 19- 22 F4.1 s RAs Right ascension (1950.0) 23- 24 I2 s e_RAs ? rms uncertainty on right ascension 26- 27 A2 --- f_DEm [v^ ] Possible lobe confusion on Decl. (3) 28 A1 --- DE- Declination sign (1950.0) 29- 30 I2 deg DEd Declination (1950.0) 32- 35 F4.1 arcmin DEm Declination (1950.0) 36- 37 I2 arcmin e_DEm ? rms uncertainty on declination 38 A1 --- u_DEm [)] Uncertainty flag on DE rms 40- 46 F7.1 Jy S159MHz Flux density at 159MHz 47 A1 --- n_S159MHz [W] indicates a flux density taken from Whitfield (1957MNRAS.117..680W) 48- 52 F5.1 Jy e_S159MHz ? rms uncertainty on S159MHz 53 A1 --- u_S159MHz [)] Uncertainty flag on flux rms 54 A1 --- l_Diam [~<>] Limit flag on Diam 55- 58 F4.1 arcmin Diam ? Angular diameter 60- 62 F3.1 arcmin e_Diam ? rms uncertainty on Diam 64- 67 A4 --- n_Diam Note (C: Complex, >12' upper limit for Diam) 68- 70 I3 deg GLON Galactic longitude 73- 75 I3 deg GLAT Galactic latitude 77-128 A52 --- Notes Suggested correspondences and notes (4)
Note (1): the numbers with parenthesis are doubtful either because the data are incomplete (due mainly to interferences) or because of exceptionally large spreads in the individual position or amplitude estimates. Note (2): analysis flag: 'A' indicates that the records could be analysed without recourse to a vector analysis of confused traces. 'B' shows that some analysis of confused traces was made. Note (3): Where there is some ambiguity in deciding on the correct interference lobe the alternative positions are marked thus: RA: -> Possibly lobe-shifted earlier ← Possibly lobe-shifted later ←> Possibly lobe-shifted earlier or later DE: ^ Possibly lobe-shifted North v Possibly lobe-shifted South v^ Possibly lobe-shifted North or South Note (4): The symbols ->, ←, ^, v are used to indicate that a 2C source (Shakeshaft et al., 1955MmRAS..67..106S) has had to be lobe-shifted earlier (->), later (←), North (^) or South (v). Sources denoted DWD will be discussed by Dewhirst in a separate paper.
Byte-by-byte Description of file: 3cr.dat
Bytes Format Units Label Explanations
1- 5 A5 --- 3CR 3CR source designation (1) 8- 9 I2 h RAh Right ascension (1950.0) 11- 12 I2 min RAm Right ascension (1950.0) 14- 17 F4.1 s RAs Right ascension (1950.0) 20- 23 F4.1 s e_RAs rms uncertainty on right ascension 25 A1 --- DE- Declination sign (1950.0) 26- 27 I2 deg DEd Declination (1950.0) 29- 32 F4.1 arcmin DEm Declination (1950.0) 34- 39 F6.2 arcmin e_DEm rms uncertainty on declination 41- 43 I3 deg GLON Galactic longitude 46- 48 I3 deg GLAT Galactic latitude 50- 56 F7.1 Jy S178MHz Flux density at 178MHz 57 A1 --- n_S178MHz [*] 469λ interferometer (2) 61 A1 --- l_Diam Limit flag on Diam 62- 65 F4.1 --- Diam ? Angular diameter 66 A1 --- x_Diam ["'] Units of diameter (' or ") 67- 70 F4.1 --- e_Diam ? rms uncertainty on Diam 71 A1 --- f_Diam [)] Confusing sources 73-208 A136 --- Notes Notes
Note (1): The numbering of the sources follows as far as possible that of the 3C catalogue. Some sources are omitted on account of errors in the original list, others because areas south of -5° have not been covered in the new survey; a number of additional sources in areas not covered in the original survey have been added. The 3CR numbers keep the ordering by increasing R.A. Note (2): All flux densities observed with the 469λ interferometer are marked by an asterisk; for all other sources the total power measurement was used, subtracting the systematic correction of 1.5Jy, according to the discussion by Bennett (1962MNRAS.125...75B)
History: Prepared via OCR at CDS.
(End) James Marcout, Patricia Bauer [CDS] 16-Dec-2002
|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|