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VIII/5 Bright Extragalactic Radio Sources (Kuehr+, 1981)
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Catalog of Extragalactic Radio Sources Having Flux Densities Greater Than 1 Jy
at 5 GHz
Kuehr H., Witzel A., Pauliny-Toth I.I.K., Nauber U.
<Astron. Astrophys. Suppl. 45, 367 (1981)>
=1981A&AS...45..367K
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ADC_Keywords: Galaxies, radio; Galaxy catalogs; Radio sources
Abstract:
The catalog is a compilation of 518 extragalactic radio sources with flux
densities greater than 1 Jy at 5 GHz. It contains sources from the
NRAO-MPI 5-GHz Strong Source Surveys and from re-observation at 5 GHz of
sources found in the Parkes 2.7-GHz surveys. All sources were found in
9.811 sr covered by the two surveys. This is essentially the whole sky,
excluding the galactic plane (latitudes less than 10 degrees) and the
Magellanic Clouds. The catalog includes radio flux densities, radio
positions, object classes, visual magnitudes, redshifts, and spectral
indices.
Introduction:
Codes for the position references are listed in this document in the
appendix. In the main file, errors are given for all radio positions,
flux densities, spectral indices, and function coefficients. See the
original paper for discussions of the completeness of the catalog, of
the compilation of the flux density data, and of the fitting of simple
analytic functions to the spectra.
The EGRS catalog lists information on 518 objects with one to sixteen
flux density values for each source. The file header.dat lists the
complete header information for each object. This line has been removed
from catalog.dat. There are at most four density values in each record.
Records containing fewer than four measurements are filled with blanks
on the right. The first word of the file catalog.dat contains the id for
the object.
refs.dat contains a numerically sorted list of the radio source catalogs
cited in the flux density measurement records. For each source catalog
the original reference or references (usually one, but in one case as
many as three) are listed, as well as the pertinent characteristics of
the catalog. When more than one line was needed for a reference up to
four continuation lines were used.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
header.dat 124 518 Details for each source
catalog.dat 129 2345 Catalog
refs.dat 124 187 References
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Byte-by-byte Description of file: header.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- id *Source name
10- 16 A7 --- 3C *3C name
18- 19 I2 h RAh Right Ascension (RA) (1950.0) hours
20- 21 I2 min RAm RA (1950.0) minutes
22- 26 F5.2 s RAs RA (1950.0) seconds
27- 31 F5.2 s e_RA Error in RA
33 A1 --- DE- Declination sign
34- 35 I2 deg DEd Declination (DE) sign
36- 37 I2 arcmin DEm DE minutes
38- 41 F4.1 arcsec DEs DE seconds
42- 46 F5.1 arcsec e_DE Error in DE
48- 49 A2 --- pos-ref *Position reference
50- 55 F6.1 deg glat Galactic latitude
57- 59 A3 --- cl *Object class
60- 64 F5.1 mag mag *?Visual magnitude
65- 70 F6.3 km/s rshift *?Redshift
71- 76 F6.2 --- ind *?Spectral index
77- 80 F4.2 --- e_ind ?Sp. I. error
82- 84 A3 --- type *Function type
85- 91 F7.2 --- A ?Coefficient A
92- 97 F6.2 --- e_A ?A error
98-103 F6.2 --- B ?Coefficient B
104-107 F4.2 --- e_B ?B error
108-115 F8.2 --- C ?Coefficient C
116-121 F6.2 --- e_C ?C error
122-124 I3 --- D ?Coefficient D
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Note on id:
The EGRS contains sources from the combined NRAO-MPI 5 GHz Strong Source
Survey and Parkes 2.7 GHz Surveys. This is a coordinate-based naming
system.
Note on 3C:
If the object was listed in the 3rd Cambridge Radio Catalog (Bennett
1961; 3C), then the full 3C designation is here. If not, then this field
is blank.
Note on pos-ref:
The positions listed for the object come either from
radio-interferometery measurements (usually) or from the original
surveys (occasionally). This two-letter code indicates the source of the
coordinates and corresponds to those listed in the Appendix.
Note on cl:
If the object has been optically identified, this gives the class of the
object as a three character code as described in the following. If it
has not, this field is blank.
QSO = Quasar
GAL = Radio galaxy
BL = BL Lacertae object
EF = Empty field
CF = Confused field (i.e., more than one object in the field)
Note on mag and rshift:
From Veron and Veron (1979) and Kuehr (1980).
Note on ind:
The two point spectral index . . . as determined between 2700 MHz and
5000 MHz. The spectral index is defined here as alpha., where the flux
density is assumed proportional to frequency.
Note on type:
For sources with flux density measurements at more than three
frequencies, an attempt was made to fit a simple analytic function to
the spectrum. This field contains one of four values depending on the
result of this fit:
LIN = The spectrum was successfully fitted by a straight line of
the form y = A + Bx, where x = log v and y = log S
Coefficients A and B only will contain data, coefficients C and D
will be blank.
EXP = The spectrum was fitted by a function of the type
y = A + Bx + Cexp(Dx).
All four coefficient fields will contain data.
CPX = Although there were sufficient data points for the source (i.e.,
more than three) the spectrum could not be satisfactorily fitted with
either of the above functional forms. Such a spectrum was designated
complex because it would not be physically meaningful to devise some
general analytic form to fit any spectral measurements (i.e. of
variable sources whose spectra are generally complex). All coefficient
fields will be blank.
N<4 = There were data for no more than three frequencies and
consequently no fit was attempted. All coefficient fields will be
blank.
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- id Source name
10- 14 I5 Hz freq-1 Frequency
15 A1 --- col-1 [:]
16- 23 F8.2 Jy flux-1 *Flux density
24- 31 F8.2 Jy e_flux-1 *Flux density error
33- 35 I3 --- ref-1 *Reference number
36 A1 --- ref-1-s *Ref. number suffix
41- 45 I5 Hz freq-2 ?Frequency
46 A1 --- col-2 [:]
47- 54 F8.2 Jy flux-2 *?Flux density
55- 62 F8.2 Jy e_flux-2 *?Flux density error
64- 66 I3 --- ref-2 *?Reference number
67 A1 --- ref-2-s *Ref. number suffix
72- 76 I5 Hz freq-3 ?Frequency
77 A1 --- col-3 [:]
79- 85 F7.2 Jy flux-3 ?Flux density
86- 93 F8.2 Jy e_flux-3 ?Flux density error
95- 97 I3 --- ref-3 *?Reference number
98 A1 --- ref-3-s *Ref. number suffix
103-107 I5 Hz freq-4 ?Frequency
108 A1 --- col-4 [:]
109-116 F8.2 Jy flux-4 ?Flux density
117-124 F8.2 Jy e_flux-4 ?Flux density error
126-128 I3 --- ref-4 *?Reference number
129 A1 --- ref-4-s *Ref. number suffix
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Note on flux-*:
The flux density measurements are listed, in rows, in order of ascending
frequency, so that consecutive frequencies run from left to right. The
data may be read in ascending frequency order by using a repeating
FORTRAN format statement to read successive records. All flux densities
given . . . are on the scale of Baars et al. (1977). This scale is based
on the absolute radio spectrum of Cassiopeia A. Between 0.3 and 30 GHz
it is given by a flux density S+ = 2723 Jy and a spectral index &alpha.
= -0.770 (epoch 1980.0) (Baars et al., 1977). See Kuehr et al. (1981)
for a discussion of the details of the selection and compilation of flux
densities. See also refs.dat
Note on e_flux-*:
Flux density errors were either taken directly from the catalogue or
were calculated according to the formulae given there.
Note on ref-*:
This is the code number for the radio source catalog from which the
particular flux density measurement came. refs.dat contains the radio
source catalogs used and their attributes, sorted by code number. In one
case the original catalog listed no source catalog and this field is
blank.
Note on ref-*-s:
One source catalog code number (number 94) has three distinct catalogs
associated with it, which are differentiated by , A, or B in this field.
In all other cases this field is blank.
Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- code *?Code number
4 A1 --- suf *Suffix
5- 11 F7.1 Hz freq ?Frequency
12- 17 F6.3 --- fact *?Conversion fact
18- 22 F5.1 Jy flux ?Flux density limit
24- 27 A4 --- name-1 *Name 1
29- 32 A4 --- name-2 *Name 2
34-124 A91 --- ref *Reference(s)
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Note on code:
The code numbers appearing in the flux density data records. The file is
sorted on this datum. In four cases this field is blank, but the suffix
contains an asterisk. This indicates a source catalog not directly
referenced in any flux density measurement, but which the authors
included in the Radio Source Catalogues list of the original paper. They
are included here for completeness and are the first four source
catalogs listed in this file. Code numbers 901-910 correspond to
unpublished flux densities. If both this and the suffix fields are
blank, the reference(s) field will be a continuation from the previous
record.
Note on suf:
One code number (number 94) has three distinct source catalogs
associated with it, which are differentiated by , A, or B in this field.
An asterisk in this field indicates that the source catalog cited was
not directly referenced in any flux density measurement, but was listed
in the original paper as a source catalog. In all other cases this field
is blank.
Note on fact:
This field gives the factor used to convert the flux densities in the
catalog to the scale used (Baars et al. 1977) It is a ratio of the Baars
et al. (1977) flux density scale to that of the source catalog at the
frequency specified.
Note on Flux density limit
Before the data from a given source catalog were included in this
compilation the values were checked against data on individual sources
from all other catalogs to determine reliability. If there was a cut-off
for inclusion from a specific catalog, that value is listed here.
Note on name-*:
If the catalog has a common designation (3C, PKs, etc.), it is listed
here.
Note on ref:
The original paper or papers in which the catalog appeared. There are a
maximum of three references for a single catalog.
History:
The Catalog of Extragalactic Radio Sources Having Flux Densities Greater
Than 1 Jy at 5 GHz (EGRS) was sent to the Astronomical Data Center
(ADC), NASA Goddard Space Flight Center, by the Centre de Donnees
Stellaires (CDS), and received February 10, 1986.
The original tape contained a single text file formatted in the same
manner as the published catalog; that is, with two header records per
object and with the flux density measurements arranged in ascending
order in columnar format. The two header records per object were
combined into a single record. A FORTRAN program was written to
rearrange the flux density measurements from columns into rows, so that
the data may now be read in order of ascending flux by using a simple
repeating FORTRAN format statement.
A FORTRAN program was run that checked the validity of each field
according to its data type and value. ADC personnel created a separate
file for the radio source catalogs. The data for this file were taken
from Kuehr et al. (1981).
This work was supervised by Wayne W. Warren who also wrote the original
document. To permit every line in the catalog to be read with the same
format, the undersigned removed the header lines into a separate file
(header.dat) and entered the source id in the first field of each record
in catalog.dat. She also translated the document from Script to ASCII
and rearranged it into the current standard form and altered the format
tables appropriately.
References:
Baars, J. W. M., Genzel, R., Pauliny-Toth, I. I. K., and Witzel, A.
1977, Astron. Astrophys., 61, 99.
Bennett, A. S. 1961, Mem. R. A. S., 68, 163.
Kuehr, H. 1977, Astron. Astrophys. Suppl. Ser., 29, 139.
Kuehr, H. 1980, Ph.D. dissertation, Bonn.
Kuehr, H., Witzel, A., Pauliny-Toth, I. I. K., and Nauber, U. 1981,
Astron. Astrophys. Suppl. Ser., 45, 367-430.
Veron, M. P. and Veron, P. 1979, Astron. Astrophys. Suppl. Ser., 36,
331.
Appendix:
For each position given in the header records of the catalog file there
is also given a two letter code indicating the reference for this
position. Codes from AA through BL . . . denote positions measured with
a radio interometer, whereas codes SA through SP denote positions from
the original survey instrument.
The following table defines the codes and the corresponding references.
the original survey instrument.
AA = VLA calibrator list, Johnston, K., private communication.
AB = Adgie, R. L. 1974, Astron. J., 79, 846.
AC = Adgie, R. L., Crowther, J. H., Gent, H. 1972, Mon. Not. Roy.
Astron. Soc., 159, 233.
AD = Adgie, R. L., Gent, H. 1966, Nature, 209, 549.
AE = Brandie, G. W., Bridle, A. H. 1974, Astron. J., 79, 903.
AF = Bridle, A. H., Fomalont, E. B. 1978, Astron. J., 83, 704.
AG = Brosche, P., Wade, C. M., Hjellming, R. M. 1973, Astrophys. J.,
183, 805.
AH = Cohen, M. H. 1972, Astrophys. Letters, 122, 81
AI = Cohen, A. M., Porcas, R. W., Browne, I. W. A., Daintree, E. J.,
Walsh, D. 1977, Mem. Roy. Astron. Soc., 84, 1.
AJ = Condon, J. J., Hicks, P. D., Jauncey, D. L. 1977, Astron. J., 82, 692.
AK = Condon, J. J., Jauncey, D. L., Wright, A. E., 1978, Astron. J.,
83, 1036.
AL = Douglas, J. N., Bash, F. N., Ghigo, F. D., Moseley, G. F.,
Torrence, G. W. 1973, Astron. J., 78, 1.
AM = Edwards, T., Kronberg, P. P., Menard, G. 1975, Astron. J., 80, 1005.
AN = Elsmore, B., Ryle, M. 1976, Mon. Not. Roy. Astron. Soc., 174, 411
AO = Fomalont, E. B., Moffet, A. T. 1971, Astron. J., 76, 5.
AP = Right Ascension taken from Fomalont, E. B., Moffet, A. T.
1971, Astron. J., 76, 5.
Declination taken from Bolton, J. G., Shimmins, A. J. 1973,
Austr. J. Phys. Astrophys. Suppl., 30, 1.
AQ = Frater, R. H., Watkinson, A., Retallack, D. S., Goss, W. M.
1976, Mon. Not. Roy. Astron. Soc., 176, 487.
AR = Ghigo, F. D. 1977, Astrophys. J. Suppl., 35, 359
AS = Ghigo, F. D., Owen, F. N. 1973, Astron. J., 78, 848.
AT = Grueff, G., Vigotti, M. 1975, Astron. Astrophys. Suppl. Ser., 19, 117.
AU = Gubbay, J. S. 1978, Astron. J., 83, 697.
AV = Haynes, M., Sramek, R. 1975, Astron. J., 80, 673.
AW = Hoegbom, J. A., Carlsson, I. 1974, Astron. Astrophys., 34, 341.
AX = Hoskins, D. G., Murdoch, H. S., Adgie, R. L., Crowther, J. H.,
Gent, H. 1974, Mon. Not. Roy. Astron. Soc., 166, 235.
AY = Hunstead, R. W., Lasker, B. M., Mintz, B., Smith, M. G.
1971, Austr. J. Phys., 24, 601.
AZ = Hunstead, R. W. 1972, Mon. Not. Roy. Astron. Soc., 157, 367.
BA = Hunstead, R. W., Lasker, B. M., Mintz, B., Smith, M. G.
1971, Austr. J. Phys., 24, 601.
BB = Lasker, B. M., Smith, M. G. 1974, Austr. J. Phys., 27, 13
BC = MacDonald, G. H., Kenderdine, S., Neville, Ann C. 1968,
Mon. Not. Roy. Astron. Soc., 138, 259.
BD = McEwan, N. J., Browne, I. W. A., Crowther, J. H. 1975,
Mem. Roy. Astron. Soc., 80, 1.
BE = Owen, F. N., Porcas, R. W., Neff, Susan G. 1978, Astron. J., 83, 1009.
BF = Pooley, G. G., Henbest, S. N. 1974, Mon. Not. Roy. Astron. Soc.,
176, 487.
BG = Sharp, J. R., Bash, F. N. 1975, Astron. J., 80, 335.
BH = Veron, M. P., Veron, P., Adgie, R. L., Gent, H.
1976, Astron. Astrophys., 47, 401.
BI = Wade, C. M., Miley, G. K. 1971, Astron. J., 76, 101.
BJ = Mackay, C. D. 1969, Mon. Not. Roy. Astron. Soc., 145, 31.
BK = Pauliny-Toth, I. I. K., Kellerman, K. I., Davis, M. M.,
Fomalont, E. B., Shaffer, D. B. 1972, Astron. J., 77, 265.
BL = NRAO interferometer positions, unpublished.
SA = Pauliny-Toth, I. I. K., Kellerman, K. I., Davis, M. M.,
Fomalont, E. B., Shaffer, D. B. 1972, Astron. J., 77, 265.
SB = Pauliny-Toth, I. I. K., Kellerman, K. I. 1972b, Astron. J., 77, 797.
SC = Pauliny-Toth, I. I. K., Witzel, A., Preub, E., Kuehr, H., Kellerman,
K. I., Fomalont, E. B., Davis, M. M. 1978, Astron. J., 83, 451.
SD = Kuehr, H., Pauliny-Toth, I. I. K., Witzel, A., Schmidt J.
1980, Astron. J., (submitted).
SE = Wall, J. V., Cannon, R. D. 1973, Austr. J. Phys. Astrophys. Suppl.,
31, 1.
SE = Wall, J. V., Cannon, R. D. 1973, Austr. J. Phys. Astrophys. Suppl.,
SE = Wall, J. V., Cannon, R. D. 1973, Austr. J. Phys. Astrophys. Suppl.,
31, 1.
SF = Shimmins, A. J., Bolton, J. G. 1972b, Austr. J. Phys.
Astrophys. Suppl., 26, 1.
SG = Bolton, J. G., Shimmins, A. J. 1973, Austr. J. Phys.
Astrophys. Suppl., 30, 1.
SH = Shimmins, A. J., Bolton, J. G. 1974, Austr. J. Phys.
Astrophys. Suppl., 32, 1.
SI = Bolton, J. G., Shimmins, A. J., Wall, J. V. 1975, Austr. J.
Phys. Astrophys. Suppl., 34, 1.
SJ = Bolton, J. G., Butler, P. W. 1975, Austr. J. Phys. Astrophys.
Suppl., 34, 33.
SK = Wall, J. V., Shimmins, A. J., Bolton, J. G. 1975, Austr. J.
Phys. Astrophys. Suppl., 34, 55.
SL = Wall, J. V., Wright, A. E., Bolton, J. G. 1976, Austr. J.
Phys. Astrophys. Suppl., 39, 1.
SM = Wright, A. E., Savage, A., Bolton, J. G. 1977, Austr. J. Phys.
Astrophys. Suppl., 41, 1.
SN = Savage, A., Wright, A. E., Bolton, J. G. 1977, Austr. J. Phys.
Astrophys. Suppl., 44, 1.
SO = Bolton, J. G., Wright, A. E., Savage, A. 1979, Austr. J. Phys.
Astrophys. Suppl., 46, 1.
SP = Shimmins, A. J., Clarke, Margaret E., Ekers, R. D. 1966,
Austr. J. Phys., 19, 649.
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(End) Nancy G. Roman [ADC/SSDOO] July-22-1995