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VIII/34 Parkes Half-Jansky Flat-Spectrum Sample (Drinkwater + 1997)
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The Parkes Half-Jansky Flat-Spectrum Sample
Drinkwater M.J., Webster R.L., Francis P.J., Condon J.J.,
Ellison S.L., Jauncey D.L., Lovell J., Peterson B.A., Savage A.
<Mon. Not. R. Astron. Soc. 284, 85 (1997)>
=1997MNRAS.284...85D
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ADC_Keywords: Radio sources
Keywords: catalogs - BL Lacertae objects: general - galaxies: general -
quasars: general - radio: continuum: galaxies
Abstract:
We present a new sample of Parkes half-Jansky flat-spectrum radio
sources having made a particular effort to find any previously
unidentified sources. The sample contains 323 sources selected
according to a flux limit of 0.5 Jy at 2.7 GHz, a spectral index
measured between 2.7 and 5.0 GHz of {alpha}(2.7/5.0) > -0.5, where
S(f) is proportional to f^alpha^, Galactic latitude |b| > 20{deg} and
-45{deg} < Declination(B1950) < +10{deg}. The sample was selected
from a region 3.90 steradians in area.
We have obtained accurate radio positions for all the unresolved
sources in this sample and combined these with accurate optical
positions from digitised photographic sky survey data to check all the
optical identifications. We report new identifications based on R- and
Kn-band imaging and new spectroscopic measurements of many of the
sources. We present a catalogue of the 323 sources of which 321 now
have identified optical counterparts and 277 have measured spectral
redshifts.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 157 323 Parkes Half-Jansky Flat-Spectrum Sample
(Table 5 of the paper)
refs.dat 232 121 Reference list with codes
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See also:
http://www.phys.unsw.edu.au/~mjd/papers : original papers
VIII/5 : Bright Extragalactic Radio Sources (1Jy) (Kuehr+, 1981)
VIII/15 : Parkes Radio Sources Catalogue (PKSCAT90) (Wright+ 1990)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq [1/323]+ Running number
6- 17 A12 --- Name PKSCAT90 name (B1950) from cat. <VIII/15>
19- 23 F5.2 Jy S2.7 Flux density at 2.7GHz
25- 29 F5.2 Jy S5.0 Flux density at 5.0GHz
31- 35 F5.2 --- alpha spectral index
37- 40 I4 --- rFlux [1/121] Flux reference
43- 44 I2 h RAh Right ascension B1950 (hours)
46- 47 I2 min RAm Right ascension B1950 (minutes)
49- 53 F5.2 s RAs Right ascension B1950 (seconds)
56 A1 --- DE- Declination B1950 (sign)
57- 58 I2 deg DEd Declination B1950 (degrees)
60- 61 I2 arcmin DEm Declination B1950 (minutes)
63- 66 F4.1 arcsec DEs Declination B1950 (seconds)
68- 71 I4 --- rPos position reference
73- 87 A15 --- comment comment on radio/optical morphology (1)
89- 93 F5.2 arcsec dRA (optical-radio) RA offset
95- 99 F5.2 arcsec dDE (optical-radio) Dec offset
101-105 F5.2 arcsec dr total position offset
107 A1 --- cl [gsfm] morphological classification (2)
109-113 F5.2 mag Bj ?=0.00 Magnitude at optical Bj
115 A1 --- l_z [>] (for lower limits)
116-121 F6.4 --- z ?=0.0 redshift
123-126 I4 --- r_z [1/121]?=0 redshift reference
128-131 I4 --- Rsp ?=0 published spectrum reference
134-135 I2 h RAh2000 Right Ascension J2000 (hours)
137-138 I2 min RAm2000 Right Ascension J2000 (minutes)
140-144 F5.2 s RAs2000 Right Ascension J2000 (seconds)
147 A1 --- DE-2000 Declination J2000 (sign)
148-149 I2 deg DEd2000 Declination J2000 (degrees)
151-152 I2 arcmin DEm2000 Declination J2000 (minutes)
154-157 F4.1 arcsec DEs2000 Declination J2000 (seconds)
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Note (1): a brief description of the radio morphology if the source is
resolved using the terminology by Downes et al. (1986MNRAS.218...31D):
P : partially resolved source
Do : double sources with no central component
Do+CC : double sources with a central component or peak
H : diffuse halo around a central source
HT : complex head-tail morphology
Comments in parentheses refer to the optical identification. In cases
where there was no match to the sky catalogues but the source was
identified using CCD data, these are indicated as (B) (R) (I) and (K)
for the respective wavebands. If the CCD imaging did not identify the
source, the comment 'blank' is made, and 'STAR' indicates a source too
near a bright star. If the source was confused with a close neighbour
in the sky catalogues, but separated by a CCD image, the comment
'merge' is made followed by the waveband used; in some cases the
Digitized Sky Survey data was used to separate the object ('DSS')
Note (2): g = galaxy, s = stellar, f = too faint, m = merged
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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- 3 I3 --- RefNum [1/121]+ Reference number (rFlux, rPos, r_z)
5- 23 A19 --- BibCode Bibliographic code, or CDS catalogue number
25-232 A208 --- Text of Reference
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Acknowledgements:
It is a pleasure to thank Michael Drinkwater <mjd@aaocbn.aao.gov.au>
who supplied the tables in November 1996.
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(End) Francois Ochsenbein [CDS] 23-Dec-1996