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J/AJ/77/405 Intense radio sources at 1400MHz (BDFL sample) (Bridle+, 1972)
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Flux densities, positions, and structures for a complete sample of
intense radio sources at 1400MHz.
Bridle A.H., Davis M.M., Fomalont E.B., Lequeux J.
<Astron. J. 77, 405 (1972)>
=1972AJ.....77..405B (SIMBAD/NED BibCode)
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ADC_Keywords: Radio sources ; Surveys ; Radio lines
Abstract:
Accurate flux densities, precise positions of unresolved sources, and
structures of resolved sources have been derived from full-beam and
interferometric observations of intense sources at 1400 MHz. Results
are given for 424 sources in the area of sky -5{deg}<{delta}<+70{deg},
|b|>5 whose 1400-MHz integrated flux densities S_1400_ exceed 1.70Jy
[1 Jy (flux unit) = 10^-26^w/m^2^/Hz]. The 234 sources with
S_1400_>=2.00Jy, equivalent diameters <10arcmin, and |b|>20{deg} form
a 98+/-2% complete sample comparable in number to the 178-MHz Revised
Third Cambridge Catalogue in this 4.30-sr area of sky, but selected at
1400MHz. This sample is suitable for statistical studies of the
properties of extragalactic radio sources. To facilitate its use, and
that of other samples which may be drawn from these data, references
to other studies of the positions, fine and extended structure,
polarization, and variability of the sources have been assembled in
the principal table of this paper (Table 2). A comparison is made with
other 1400-MHz flux-density data (Sec. 3), and the spectral content of
the complete sample is discussed (Sec. 4).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 165 424 A complete catalogue of intense sources at
1400MHz
table3.dat 66 76 Confusing sources
table4.dat 60 74 New east-west interferometric observations of
resolved sources
notes.dat 80 179 Individual notes to table2.dat and table4.dat
table5.dat 130 229 Sources with S_1400_>1.7Jy in other surveys
rejected from the present catalogue
refs.dat 114 93 References to table2.dat
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Nomenclature Note:
This list if intense radio sources later become known in the
astronomical literature as the BDFL sample.
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Source Source designation
8- 9 A2 --- n_Source [* +#] Note on source (1)
11- 20 A10 --- Name Common source name. LS indicates a lobe shift
in the original survey
22- 23 I2 h RAh Right ascension (1950.0)
25- 26 I2 min RAm Right ascension (1950.0)
28- 31 F4.1 s RAs Right ascension (1950.0)
32 A1 --- n_RAs [*] Note detailed in file notes.dat
33- 35 F3.1 s e_RAs rms uncertainty on right ascension (1950.0)
37- 38 A2 --- r_RAh Reference for the right ascension
40 A1 --- DE- Declination sign (1950.0)
41- 42 I2 deg DEd Declination (1950.0)
44- 45 I2 arcmin DEm Declination (1950.0)
47- 48 I2 arcsec DEs Declination (1950.0)
49 A1 --- n_DEs [*] Note detailed in file notes.dat
50- 51 I2 arcsec e_DEs rms uncertainty on declination (1950.0)
53- 54 A2 --- r_DEd Reference for the declination (2)
56- 58 I3 deg GLAT Galactic latitude truncated to nearest degree
60- 66 F7.2 Jy S1400MHz Flux density and standard error at 1400 MHz
67 A1 --- n_S1400MHz [*] Note detailed in file notes.dat
68- 71 F4.2 Jy e_S1400MHz ? rms uncertainty on S1400MHz
73- 75 A3 --- r_S1400MHz Reference for the flux density (2)
77- 78 A2 --- Class [CDHT? ] Structure type (3)
79 A1 --- n_Class [*] Note detailed in file notes.dat
80 A1 --- l_EW Limit flag on EW
81- 85 F5.2 arcmin EW ? East-west extent
86 A1 --- n_EW [*] Note detailed in file notes.dat
88- 89 A2 --- r_EW Reference for east-west extent (2)
91 A1 --- l_NS Limit flag on NS
92- 96 F5.2 arcmin NS ? North-south extent
97 A1 --- n_NS [:*] Note on NS detailed in file notes.dat
99-100 A2 --- r_NS Reference for north-south extent (2)
102-104 A3 --- BClass [HL ()] Brightness classification (4)
105 A1 --- n_BClass [*] Note detailed in file notes.dat
107 A1 --- l_P1400MHz Limit flag on P1400MHz
108-111 F4.1 % P1400MHz ? Integrated degree of polarization at 1400MHz
112 A1 --- n_P1400MHz [*] Note detailed in file notes.dat
114-116 I3 deg PA ? Position angle of electric vector at 1400MHz
118 I1 --- r_P1400MHz ? Reference for polarization (2)
120-165 A46 --- Notes Other references to information concerning the
source. For sources resolved by the 300-ft
observations, peak flux densities are given
in this column
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Note (1): *: sources for which contour maps are given in Fig. 5
+: there is a nearby weak source within a radius of about 20arcmin
The flux density, separation, and position angle (defined from the
catalogued source towards the weaker source) are given in a
footnote, and a more detailed listing is given in table3.
#: source which is composed of two widely separated components and
which is likely to be an accidental, rather than physical, double
Note (2): N, C & KPW: references to data presented in table2.dat
1-6: Polarization data
A: Accurate positions for unresolved sources
M: Accurate positions and structures and/or maps of extended sources
P: Positions only, structures unknown in these measurements
S: Structures only
VLB: Long baseline interferometry
SC: Interplanetary scintillation data
VAR: Variable Radio sources
All the references are in file "refs.dat"
Note (3): D: double, T: triple, H: core-halo, C: complex
Note (4): H: high brightness, L: low brightness
See Bridle el al. (1972, Nature Phys. Sci. 235, 123)
This classification is given only for those sources in the complete
sample:-5{deg}<DE<70{deg}, angular extent <10' with S>=2.00Jy for
|b|>=20{deg} (234 sources) or S>6.00Jy for 5{deg}<=|b|<20{deg} (18
sources)
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Source Source designation
9- 80 A72 --- Note Text of the note
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Catalogue source
12- 20 A9 --- NSource Nearby source
22- 23 I2 h RAh Right ascension (1950.0)
25- 26 I2 min RAm Right ascension (1950.0)
28- 31 F4.1 s RAs Right ascension (1950.0)
32 A1 --- n_RAh [*] *: Data from CIT observations
33 A1 --- DE- Declination sign (1950.0)
34- 35 I2 deg DEd Declination (1950.0)
37- 38 I2 arcmin DEm Declination (1950.0)
40- 41 I2 arcsec DEs Declination (1950.0)
42 A1 --- n_DEd [*] *: Data from CIT observations
44- 46 I3 deg GLAT Galactic latitude
48- 51 F4.2 Jy S1400MHz Integrated flux density
52 A1 --- n_S1400MHz [*] *: Data from CIT observations
54- 57 F4.2 Jy S1400MHzp ? Peak flux density
59- 62 F4.1 arcmin Sep Separation
64- 66 I3 deg PA Position angle from the catalogue source
towards the nearby source
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Source Source designation
8 A1 --- m_Source [ ABC] Multiplicity index on Source (1)
10- 12 F3.1 Jy S1400MHz ? Flux density
14- 16 F3.1 Jy e_S1400MHz ? rms uncertainty on S1400MHz
18 A1 --- l_EW Limit flag on EW
19- 21 F3.1 arcmin EW ? East-West diameter
23- 25 F3.1 arcmin e_EW ? rms uncertainty on EW
27- 32 F6.2 arcmin Pos ? Position with respect to the
source centroid
34- 35 I2 h RAh ? Right ascension (1950.0)
37- 38 I2 min RAm ? Right ascension (1950.0)
40- 44 F5.2 s RAs ? Right ascension (1950.0)
46- 49 F4.2 s e_RAs ? rms uncertainty on right ascension
51- 80 A30 --- Note Notes (2)
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Note (1): When no multiplicity index, source centroid
Note (2): 1: The model fit of the interferometer data is fair.
Structure may be more complex.
See individual notes in file notes.dat.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Survey Survey name
12- 15 F4.2 Jy S ? Survey flux density
16- 18 A3 --- n_S [PERpecun, ?] (1)
20 A1 --- l_S1400MHz NRAO flux density
21- 24 F4.2 Jy S1400MHz ? Flux density
26- 29 F4.2 Jy e_S1400MHz ? rms uncertainty on S1400MHz
32- 33 I2 h RAh Right ascension (1950.0)
35- 36 I2 min RAm Right ascension (1950.0)
38- 41 F4.1 s RAs Right ascension (1950.0)
43 A1 --- DE- Declination sign (1950.0)
44- 45 I2 deg DEd Declination (1950.0)
47- 48 I2 arcmin DEm Declination (1950.0)
50- 51 I2 arcsec DEs ? Declination (1950.0)
52 A1 --- u_DEs [:] Uncertainty flag on position
54- 58 A5 --- Notes Notes (2)
61-130 A70 --- Com Comments
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Note (1):
Classification codes from DA catalogue (Galt & Kennedy, 1968AJ.....73..135G)
P = Point source
E = Extended
R = Ridge
Classification codes from OSU catalogue (Kraus 1964Natur.202..269K;
Kraus & Dixon, 1965Natur.207..587K; Kraus et al., 1966ApJ...144..559K;
Scheer & Kraus, 1967AJ.....72..536S; Dixon & Kraus, 1968AJ.....73..381D;
Fitch et al., 1969AJ.....74..612F; Ehman et al., 1970AJ.....75..351E)
c = confused source
e = extended source
p = point source
n = noisy data
u = several components
Note (2): 1: No identifiable discrete source in field mapped at NRAO
2: Data from Pauliny-Toth et al. (1966ApJS...13...65P)
3: Companion <0.2 Jy within 15' of source
4: Noted in DA as confused with another source
5: Probably confused in original observations by extended background
feature
I: Scheer and Kraus, 1967AJ.....72..536S
II: Dixon and Kraus, 1968AJ.....73..381D
III: Fitch et al., 1969AJ.....74..612F
IV: Ehman et al., 1970AJ.....75..351E
V: Dixon, 1970ApJS...20....1D, Cat. <VII/2>
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Ref References designation
6-114 A109 --- Text Reference
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History: Prepared via OCR at CDS, and proof-read by
Heinz Andernach <heinz@astro.ugto.mx>
A typo in original paper (note about 0330+16) was corrected to
0300+16 here in file "notes.dat"
Some names were corrected in table2.dat on 11-Feb-1999
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(End) J. Marcout, P. Bauer [CDS], H. Andernach [Guanajuato Univ.] 29-Jan-1999