J/ApJS/81/83 Compendium of Radio Spectra and Luminosities (Herbig+ 1992)
Compendium of Radio Spectra and Luminosities for three complete samples of
Radio Sources
Herbig T., Readhead A.C.S.
<Astrophys. J. Suppl. 81, 83 (1992)>
=1992ApJS...81...83H 1992ApJS...81...83H
ADC_Keywords: Radio sources - 685; Redshifts - 695
Description:
This catalog is a complete sample of 256 powerful extragalactic radio
sources. The catalog includes source identification, redshift,
luminosities and spectral indices at standard rest frequencies as well
as bolometric luminosities between emitted frequencies of 10 MHz and
100 GHz. The paper also includes fits to the measured radio spectra
which have not been included in this catalog.
File Summary:
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File Name LrecL Records Explanation
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ReadMe 80 . This file
table1.dat 88 256 Redshifts and Luminosities of sources in
the combined sample
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Byte-by-byte description of file: table1.dat
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Bytes Format Units Labels Explanation
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1- 8 A8 --- IAUname IAU name of the object.
10-16 A7 --- name Other common name.
19-24 F6.4 --- z Redshift of the object.
25 A1 --- n_z * [* ] * means Estimated redshifts
26-32 E7.2 W/Hz P150 * Emitted Luminosity at 150 MHz
34-40 E7.2 W/Hz P2500 * Emitted Luminosity at 2.5 GHz
42-48 E7.2 W/Hz P4000 * Emitted Luminosity at 40 GHz
50-56 E7.2 W Pbol * Emitted bolometric luminosities
59-63 F5.2 --- alph150 Spectral index (S ∼ nu^alpha at 150MHz)
66-70 F5.2 --- alph2500 Spectral index at 2.5 GHz
73-77 F5.2 --- alph4000 Spectral index at 40 GHz
79-82 F4.1 --- phi * Spline fitting parameter
84-86 A3 --- mem * [ABC ] Sample membership
87-88 A2 --- r_z * References to redshifts
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Note on n_z:
For 18 of the sources no redshifts were available. For Sources with
optical identifications but no reliable published redshifts, these were
estimated from their apparent optical magnitudes. In the case of five
sources not identified optically, a redshift of 1 was assumed. The
redshift of these sources has been flagged with a * in this field.
Note on P150, P2500, P4000, Pbol, phi:
Emitted specific luminosities at the emitted frequencies shown for a
value of the Hubble constant of Ho = 100 h km/s/Mpc. The values scale
with (H/Ho)^-2. To estimate the flux densities measured data points
were interpolated with a cubic spline fit to the observed flux densities.
Most fits were made in the log S(nu) - log (nu) plane. Closeness of the
spline fit was adjusted by eye with the parameter phi. Specific
luminosities were evaluated at the standard frequencies for a universe
with qo=0.5 and Lambda=0. The bolometric luminosities were calculated
from the spline fits. To extrapolate to the limits of the band the spectra
were extended as power laws from the endpoints of the spline fits.
Note on mem:
(A) revised 3CR survey of Laing et al. 1983 (LRL)
(B) survey of Peacock and Wall 1981 (PW)
(C) VLBI sample of Pearson and Readhead 1988 (PR).
Note on r_z:
(1) Laing et al. 1983
(2) Pearson and Readhead 1988
(3) Peacock and Wall 1981
(4) Riley, priv. comm.
(5) Lawrence, priv. comm.
(6) Xu, priv. comm.
(7) Murphy 1988
(8) Veron and Veron 1981
(9) Spencer et al. 1989
(10) Hewitt and Burbidge 1987.
A blank in this column indicates that no reliable redshift is
available.
The sources designated as "U" are not identified optically.
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References:
Hewitt,A. and Burbridge, G. =1993ApJS...87..451H 1993ApJS...87..451H
(Catalog: VII/158)
Laing, R.A., Riley,J.M. and Longhair,M.S. =1983MNRAS.204..151L 1983MNRAS.204..151L
Murphy, D. 1988, PhD Thesis, Un. of Manchester
Peacock, J.A. and Wall, J.V. 1981, MNRAS 194, 331.
Pearson, T.J. and Readhead, A.C.S. 1988, =1988ApJ...328..114P 1988ApJ...328..114P
Spencer, R.E., McDowell, J.C., Charlesworth, M., Franti, C.,
Parma, P. and Peacock, J.A. =1989MNRAS.240..657S 1989MNRAS.240..657S
Veron-Cetty, M.P. and Veron, P. 1991, ESO Scientific Rep., No. 10
Historical Notes:
The catalogue was provided by T. Herbig ()
to H. Andernach in August 1992 (number A064 in H.Andernach's list)
(End) N.P.M. Kuin (ADC/SSDOO/NASA) 1995-02-14