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J/PASP/97/932 3CR Source Identifications (Spinrad 1985)
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3CR Source Identifications, Update 1990
Spinrad. H, Djorgovski S., Marr J., Aguilar L.
<Publ. Astron. Soc. Pac., 97, 932 (1985)>
=1985PASP...97..932S
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ADC_Keywords: Radio sources ; Redshifts
Description:
This catalog contains the third major update of new optical and radio
data for the strong sources in the Revised Third Cambridge Catalogue
(3CR). Positions, redshifts, magnitudes, and identifications are
included, as well as some radio data for 298 3CR sources.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
3cr.dat 87 298 The catalog
ref.dat 141 199 List of references
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Byte-by-byte Description of file: 3cr.dat
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Bytes Format Units Labels Explanations
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1- 6 A6 --- 3CR * 3CR catalog number
8- 9 I2 h RAh Right Ascension 1950 - hours
11- 12 I2 min RAm Right Ascension - minutes
14- 18 F5.2 s RAs Right Ascension - seconds
20 A1 --- DE- Declination sign
21- 22 I2 deg DEd Declination 1950 - degrees
24- 25 I2 arcmin DEm Declination - arc minutes
27- 30 F4.1 arcsec DEs Declination - arc seconds
32- 36 F5.2 mag Vmag *? V visual magnitude
37 A1 --- Vflag * [* ] variable magnitude flag
39- 43 F5.3 --- z ? redshift
45- 50 F6.1 Jy S(178) flux density at 178 MHz from Kellerman et al
52- 55 F4.2 --- Alph *? spectral index
57- 59 I3 deg GLAT ? Galactic latitude
61- 63 I3 --- r_ID *? reference for optical position
65- 67 I3 --- r_z *? reference for redshift
69- 71 I3 --- r_RAh *? reference for radio position
73- 85 A13 --- notes *Remarks on source
87- 87 A1 --- ID *[GQNB ] IDentification of source
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Note on 3CR:
This columns gives the catalog number in the Revised 3CR Catalog of Radio
Sources.
Note on Vmag, Vflag:
These columns contain information about the visual magnitude of the source.
The mv column lists the visual magnitude of the object. If the mv is given
in an even 0.5-magnitude interval, it has normally been estimated from the
Palomar Sky Survey or direct photographic plates and therefore carries
substantial errors (+/- 0.5-1.0 magnitude). An asterisk in the Vflag
column indicates variability in mv with amplitude greater than 0.1 magnitude.
Note on Alph:
These columns give information on the spectral index of the source.
The spectral index given typically between 38 MHz and 750 MHz (see flags
listed below) and is taken from Kellermann et al. (1969). The spectral
index is defined as S prop. nu^(-alpha).
Note on r_ID, r_z, r_RAh:
The values refer to these references by number, and
concern the origin of the optical identification, redshift, and
radio map.
Note on notes:
This column gives additional information about the optical identification.
For the optical identification we have generally listed the first published
ID with a good finding chart. In cases where a previous paper without a
good finding chart published the same ID or where the ID was confirmed by a
subsequent, more detailed study, these references are listed under this
column. In addition to listing additional information and redshift
references, the remarks column gives other names (such as NGC number) and
the character of the optical spectrum of radio galaxies using the following
abbreviations:
SE strong emission lines
E emission lines present but not necessarily strong
WE weak emission lines
ABS only stellar absorption features are seen
ABS remarks for QSOs indicates the presence of absorption features at one
or more redshifts. Abbreviations used here include:
CL cluster
EF empty field
FC finding chart
G galaxy
ID identification
N NGC
Q QSO
SP spectrophotometry
X indicates that the reference number preceding gives an incorrect
* probable or possible identification or redshift
Note on ID :
These columns give information about the optical identification.
The following abbreviations are used in the id column:
B: BL Lac Object
G: Galaxy
N: N Galaxy
Q: QSO
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Byte-by-byte Description of file: ref.dat
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Bytes Format Units Labels Explanations
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1- 3 I3 --- RefID Reference identification number
5-141 A137 --- RefText Reference text
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History:
The data were provided to the ADC on 1993-07-20 by Mark Dickinson for
Hy. Spinrad. The documentation was updated with documentation written
by D.E. Harris of SAO for the ADS version of this catalog. The ADS
version includes extra fields: a Red Magnitude flag, a spectral index
flag, and an identification flag. This catalog is also in the
Andernach radio catalog archive as A035.
References:
Kellermann, K.I., Pauliny-Toth, I.I.K., and Williams, P.J.S., 1969,
Ap.J, 157, 1.
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(End) N.P.M. Kuin (ADC/SSDOO/NASA) 14-Feb-1995