J/MNRAS/238/1171 Optical/IR observ. of Radio Galaxies and QSOs (Dunlop+, 1989)
The Parkes selected regions : deep optical and infrared observations of radio
galaxies and quasars at high redshifts.
Dunlop J.S., Peacock J.A., Savage A., Lilly S.J., Heasley J.N.,
Simon A.J.B.
<Mon. Not. R. Astron. Soc. 238, 1171 (1989)>
=1989MNRAS.238.1171D 1989MNRAS.238.1171D
ADC_Keywords: Galaxies, radio ; QSOs ; Photometry, infrared ; Photometry, UBVRI
Description:
This catalog reports on an extensive optical and infrared study of the
178 radio sources in the Parkes Selected Regions (S > 100 mJy at 2.7
GHz). CCD observations have resulted in the essential completion (95
percent) of optical identifications and have provided B and R
photometry. In addition, K photometry has been completed for four of
the six selected regions.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
pks_opir.dat 128 180 Optical and IR Study of Parkes Radio Sources
(-22° < Dec < 4° )
refs.dat 79 58 References
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See also:
VIII/15 : Parkes Radio Sources Catalogue (PKSCAT90)
Byte-by-byte Description of file: pks_opir.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name IAU name of source (1)
11- 12 I2 h RAh Right Ascension (B1950) (hour) (2)
13- 14 I2 min RAm Right Ascension (B1950) (min)
15- 19 F5.2 s RAs Right Ascension (B1950) (sec)
20 A1 --- DE- Declination sign (B1950)
21- 22 I2 deg DEd Declination (B1950) (deg) (2)
23- 24 I2 arcmin DEm Declination (B1950) (arcmin)
25- 28 F4.1 arcsec DEs Declination (B1950) (arcsec)
30- 34 F5.3 Jy S2.7G Flux density at 2.7 GHz (3)
35 A1 --- f_S2.7G [ :] ':' if fluxes corrected for confusion
36- 40 F5.2 --- Sp-Index Spectral index between 5 and 1.4 GHz (4)
41 A1 --- u_Sp-Index [ :] ':' if spectral index is uncertain
43- 51 A9 --- Struct Brief description of radio structure (5)
53- 57 F5.2 s ra_opt ? Last column of optical right asc. (B1950) (6)
59- 62 F4.1 arcsec dec_opt ? Last column of optical declination (B1950) (6)
64- 67 F4.1 arcsec delta ? Offset between radio and optical positions (7)
69- 71 A3 --- ID Optical classification (8)
73 A1 --- l_Bmag [ >] '>' if B magnitude is a lower limit
74- 78 F5.2 mag Bmag ? Apparent B magnitude
80- 83 F4.2 mag e_Bmag ? Uncertainty on B magnitude
85 A1 --- l_Rmag [ >] '>' if R magnitude is a lower limit
86- 90 F5.2 mag Rmag ? Apparent R magnitude
91 A1 --- f_Rmag [ ?] '?' if R magnitude is uncertain
93- 96 F4.2 mag e_Rmag ? Uncertainty on R magnitude
98 A1 --- l_Kmag [ >] '>' if K magnitude is a lower limit (9)
99-103 F5.2 mag Kmag ? Apparent K magnitude (9)
104 A1 --- f_Kmag [ *?] if Kmag is uncertain or from Downes (9)
106-109 F4.2 mag e_Kmag ? Uncertainty on K magnitude (9)
111-115 F5.3 --- z ? Redshift
116 A1 --- u_z [ ?] Flagged '?' if redshift is uncertain
118-128 A11 --- r_ID Source references (10)
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Note (1): This column gives the IAU name of the source, as given in the
Parkes catalog (Cat.VIII/15). The source name is followed by an
asterisk if the first interferometer observation of the sources
was made by Downes et al. (1986MNRAS.218...31D 1986MNRAS.218...31D). Sources which
were revealed by the observations of Downes et al. to consist of
several distinct sources have been labeled A, B, ... in order of
increasing right ascension. Note that for sources 0223+018 and
1154-019 two optical counterparts are given, for which the radio
data are simply repeated. This leads to a total of 180 rows for
the 178 sources in this table.
Note (2): These columns give the B1950 right ascension and declination of
the expected position for the optical identification. For
unresolved or partly resolved sources this is the position of the
radio peak. For doubles with central components the position of
the central component has been used, while for doubles without
central components the (unweighted) midpoint of the outer
components is given. In D2 sources (see the struct column) the
flat-spectrum component has been used.
Note (3): The 2.7 GHz flux density from the original survey is given in the
"S2.7G" column (in Jy). The "f_S2.7G" column is marked with a
colon (':') if the corresponding flux density was corrected by
Downes et al. (1986MNRAS.218...31D 1986MNRAS.218...31D) to allow for confusion.
Note (4): The radio spectral index between 1.4 and 5 GHz is given in the
"alpha" column. The "f_alpha" column is marked with a colon (':')
if the spectral index is uncertain. Alpha is defined in the sense
of S ∝ ν-α.
Note (5): This column gives a brief description of the radio structure. The
following abbreviations are used:
U Unresolved. The flux density decreases by less than 10% on the
longest baselines (d∼25 km).
P Partially resolved. The flux density decreases by more than 10%
on the longest baselines, but no details of the structure are
available.
Do Double.
CC Central component.
Di Diffuse emission.
V Variable. (1) indicates that variability was detected by Condon,
Balonek, and Jauncey (1976AJ.....81..913C 1976AJ.....81..913C).
D2 Flat-spectrum core and extended emission on one side only.
H Diffuse halo.
HT Head-tail structure.
I/II Classification of the structure according to the scheme by
Fanaroff and Riley (1974MNRAS.167P..31F 1974MNRAS.167P..31F) in which type II
sources have hot spots separated by more than half the length
of the source, while type I sources do not.
Note (6): These columns give the B1950 position of the optical
identification. The positions are only given in the last unit
(sec in right ascension and arcsec in declination). The larger
units can be recovered from the radio source position.
Note (7): This column gives the offset between the radio and optical
positions, in arcsec.
Note (8): This columns gives the optical identification as follows:
Q Quasi-stellar, confirmed by spectroscopy, variability or colour
(see the paper and Downes et al. 1986MNRAS.218...31D 1986MNRAS.218...31D for
details).
Q? Stellar object on position, with colour classification suggesting
it is probably a quasar.
G Galaxy confirmed by image or colour.
G? Faint object, possibly extended with colour classification
suggesting it is probably a galaxy.
EF Empty field.
? Uncertain optical classification.
Note (9): These columns give the apparent K magnitude and associated
uncertainty. l_Kmag is flagged with a greater-than symbol if the
Kmag magnitude is a lower limit. f_Kmag is flagged with a '?' if the
K magnitude is uncertain. f_Kmag is flagged with a '*' if the
source was observed by Downes et al., 1986MNRAS.218...31D 1986MNRAS.218...31D.
Note (10): This column gives the references for (respectively) the optical
position (C denotes COSMOS measurement by Downes et al.), the
identification, the finding chart and the redshift; references
qre sepqrqted by commas.
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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- 2 I2 --- code reference code
5- 79 A75 --- reftxt Bibcode (if available) and reference text
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History:
"The catalogue was originally archived as A050 by H. Andernach
() and the ADS documentation prepared in
collaboration with Carolyn Stern Grant ()."
(End) Patricio Ortiz [CDS] 07-Apr-1999