VIII/32 Extragalactic sources at 5GHz (Jenkins+ 1977)
Observations of 104 extragalactic radio sources with the
Cambridge 5-km telescope at 5 GHz.
Jenkins C.J., Pooley G.G., Riley J.M.
<Mem. R. Astron. Soc., 84, 61 (1977)>
=1977MmRAS..84...61J 1977MmRAS..84...61J
ADC_Keywords: Radio sources
Abstract:
One hundred and four radio sources from the 3C and 4C catalogues have
been mapped with a resolution of 2arcsec in RA and 2cosecδarcsec
in DE. The results are presented here as contour maps and in tabular
form, with accurate measurements of the positions of optical objects
in the fields.
Description:
A complete sample of 3CR sources has now been observed with the 5-km
telescope at 5GHz. The sample was selected according to the following
criteria:
(a) The flux density of each individual source at 178MHz is greater
than or equal to 10Jy according to the compilation given by
Kellermann et al. (1969ApJ...157....1K 1969ApJ...157....1K).
(b) DE>10°.
(c) |b|>10°.
There are 166 sources in this sample of which one, 3C 326, was not
observed as it was originally thought to be galactic. Since it now
seems likely to be extragalactic we have included it in the sample.
The sample is listed in Table 2.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 117 348 Extragalactic radio sources
notes.dat 80 104 Individual notes
table2.dat 21 166 Sample
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See also:
VIII/1 : The 3C and 3CR Catalogues (Edge+ 1959-1962)
VIII/4 : Fourth Cambridge Survey (4C) (Pilkington+ 1965; Gower+ 1967)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Name Source number from the 3C or 4C catalogues
8 A1 --- n_Name [*] note detailed in notes.dat file
9- 10 I2 --- Nspa ? Number of spacings, N used in the
synthesis (see Section 2).
12 A1 --- f_Name [S] S for the source
14 A1 --- n_RAh [#] # = optical position
15 A1 --- u_RAh [(] Note (1)
16- 17 I2 h RAh ? Radio peak of emission right ascension (1950)
19- 20 I2 min RAm ? Radio peak of emission right ascension (1950)
22- 27 F6.3 s RAs ? Radio peak of emission right ascension (1950)
29- 33 F5.3 s e_RAs ? rms uncertainty on right ascension (2)
34 A1 --- DE- ? Radio peak declination sign (1950)
35- 36 I2 deg DEd ? Radio peak of emission declination (1950)
38- 39 I2 arcmin DEm ? Radio peak of emission declination (1950)
41- 45 F5.2 arcsec DEs ? Radio peak of emission declination (1950)
47- 51 F5.2 arcsec e_DEs ? rms uncertainty in DEs (2)
52 A1 --- u_DEd [)] Note (1)
54- 56 I3 deg PA ? Position angle of the major axis of the
component, if well defined
58 A1 --- l_omega1 Limit flag on omega1
59- 62 F4.1 arcsec omega1 ? Angular extent of each component parallel and
perpendicular to its major axis (3)
63 A1 --- u_omega1 Uncertainty flag on omega1
65 A1 --- l_omega2 Limit flag on omega2
66- 69 F4.1 arcsec omega2 ? Angular extent of each component parallel and
perpendicular to its major axis (3)
70 A1 --- u_omega2 Uncertainty flag on omega2
72- 75 I4 mJy S5GHz ? Flux density of each component at 5 GHz
77- 79 I3 mJy e_S5GHz ? rms uncertainty on S5GHz
82- 87 F6.1 arcsec Theta ? Overall angular extent of the source (4)
88 A1 --- u_Theta Uncertainty flag on theta
90- 93 I4 mJy I5GHz ? Integrated flux density of the source at
5GHz (5)
95- 97 I3 mJy e_I5GHz ? rms uncertainty on I5GHz
100-105 F6.4 --- z ? Redshift of the associated object.
108-111 I4 Mpc Dist ? Distance derived from the redshift (6)
113 A1 --- l_Size Limit flag on Size
114-116 I3 kpc Size ? Total linear size of the source if the
angular size is that given in column Theta
117 A1 --- u_Size Uncertainty flag on size
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Note (1): The coordinates in brackets are unlikely to be related to the
radio source.
Note (2): No error is quoted if the component has no well-defined peak.
Note (3): The angular extents of each component parallel and
perpendicular to its major axis; if no position angle is given, the
quoted angular sizes are in RA and DE. When the component is barely
resolved, a Gaussian brightness distribution is assumed in estimating
its angular extent. For more complex components the quoted sizes are
only approximate.
Note (4): This is usually the separation of the outermost peaks of a
multiple source.
Note (5): This is the maximum amplitude on the smallest interferometer
spacing used in the observations. For 3C sources the values measured
in this way agree well with those given by Kellermann, Pauliny-Toth &
Williams (1974MNRAS.169..477P 1974MNRAS.169..477P).
Note (6): An Einstein-de Sitter model has been used, assuming
H0=50km/s/Mpc, Ω=1 and q0=0.5.
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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- 8 A8 --- Name 3C or 4C name
10- 80 A71 --- Note Text of the note
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name 3C number
11- 16 F6.1 --- S178MHz Flux density at 178 MHz on the scale of
Kellermann et al., 1969ApJ...157....1K 1969ApJ...157....1K
19- 21 A3 --- Ref Reference to the 5-GHz, 5-km telescope (1)
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Note (1): References:
ER 1976MNRAS.174..411E 1976MNRAS.174..411E, Elsmore & Ryle
H 1974MNRAS.168..491H 1974MNRAS.168..491H, Hargrave
HM 1975MNRAS.173...37H 1975MNRAS.173...37H, Hargrave & McEllin
JPR 1977MmRAS..84...61J 1977MmRAS..84...61J, Jenkins et al., this paper
JS 1976MNRAS.174..327J 1976MNRAS.174..327J, Jenkins & Scheuer
L 1975MNRAS.173..309L 1975MNRAS.173..309L, Longair
N 1973MNRAS.165..369N 1973MNRAS.165..369N, Northover
PH 1974MNRAS.169..477P 1974MNRAS.169..477P, Pooley & Henbest
RB 1973MNRAS.164..271R 1973MNRAS.164..271R, Riley & Branson
RP 1976MmRAS..80..105R 1976MmRAS..80..105R, Riley & Pooley
T1 1975MNRAS.170..281T 1975MNRAS.170..281T, Turland
T2 1975MNRAS.172..181T 1975MNRAS.172..181T, Turland
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Acknowledgements:
From Heinz A. Andernach (R806 in his list)
(End) Patricia Bauer [CDS] 27-Nov-2003