VIII/45 Southern flat-spectrum sources (White+ 1987-1991)
Radio positions and Optical Identifications for a sample of Southern
flat-spectrum radio sources
White G.L., Batty M.J., Bunton J.D., Brown D.R., Corben J.B.
<Mon. Not. R. Astron. Soc. 227, 705 (1987); 248, 398 (1991)>
=1987MNRAS.227..705W 1987MNRAS.227..705W
=1991MNRAS.248..398W 1991MNRAS.248..398W
ADC_Keywords: Radio sources ; Cross identifications
Description:
Optical identifications have been sought for 198 southern radio
sources (73 in Paper I, 06h<RA(B1950)<18h and 125 in Paper II,
18h<RA(B1950)<06h) using new positions determined with the six-dish
array of the Fleurs synthesis telescope. These sources constitute a
complete sample drawn from the Parkes 2700-MHz catalogue. They are all
flat-spectrum sources stronger than 0.25 Jy at 2700 MHz and lie
between Dec(B1950) -80 and -50°. Sources with |b|<5° are not
included. The new radio positions have standard deviations of about
1'' (2'' in Paper I, 1'' in Paper II) in right ascension and
declination. The optical positions are with respect to the FK4
reference system as defined by the Perth catalogues and have position
uncertainties of about 0.5arcsec. Magnitude estimates are on the J
scale and are accurate to about 0.4mag for stellar-like objects and
0.5 to 1.0mag for galaxies. The sample is complete to the 22.5-mag
limit of the SERC-J sky atlas.
There are 198 sources in the complete sample. 31 sources (16%) show
some radio structure with the 2'' beam. For the 175 unresolved
sources, there are 124 QSOs (71%), 26 galaxies (15%) and 25 empty
fields (14%) suggested.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 122 212 Radio positions and optical identifications
table2.dat 91 212 Radio and optical identifications
notes.dat 80 127 Notes (to table1)
--------------------------------------------------------------------------------
See also:
VIII/15 : Parkes Radio Sources Catalogue (PKSCAT90) (Wright+ 1990)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 I1 --- Paper [1,2] Paper I (1987), or II (1991)
3- 10 A8 --- PKS Name in PKS system (based on B1950 position)
13- 14 I2 h RAh ? Right Ascension B1950 (hours)
16- 17 I2 min RAm ? Right Ascension B1950 (minutes)
19- 23 F5.2 s RAs ? Right Ascension B1950 (seconds)
26 A1 --- DE- ? Declination B1950 (sign)
27- 28 I2 deg DEd ? Declination B1950 (degrees)
30- 31 I2 arcmin DEm ? Declination B1950 (minutes)
33- 36 F4.1 arcsec DEs ? Declination B1950 (seconds)
39- 40 I2 h RA(opt)h ? Right Ascension B1950 (hours)
42- 43 I2 min RA(opt)m ? Right Ascension B1950 (minutes)
45- 50 F6.3 s RA(opt)s ? Right Ascension B1950 (seconds)
52 A1 --- DE(opt)- ? Declination B1950 (sign)
53- 54 I2 deg DE(opt)d ? Declination B1950 (degrees)
56- 57 I2 arcmin DE(opt)m ? Declination B1950 (minutes)
59- 63 F5.2 arcsec DE(opt)s ? Declination B1950 (seconds)
66- 69 F4.1 arcsec dRA ? Difference optical - radio (RA)
70 A1 --- u_dRA Uncertainty flag (:) on dRA
72- 75 F4.1 arcsec dDE ? Difference optical - radio (Dec)
76 A1 --- u_dDE Uncertainty flag (:) on dDE
77- 78 A2 --- optID *[QgEFcD ] Optical identification
80- 83 F4.1 mag Bjmag ? Magnitude of optical counterpart (J plate)
84 A1 --- n_Bjmag [v] Flag for variability
85- 89 F5.2 --- S2.7GHz ? Flux density at 2.7GHz
91- 95 F5.2 --- Sp+Index ? Spectral index (2.7-5.0GHz)
98-102 F5.1 deg GLON ? Galactic longitude
105-109 F5.1 deg GLAT ? Galactic latitude
111-122 A12 --- Note *Comma-separated list of notes (see notes.dat)
--------------------------------------------------------------------------------
Note on optID: the symbols are:
Q=quasar, g=galaxy, EF=empty field , cD=compact dwarf galaxy
Note on Note:
Letters indicate general remarks, and numbers refer to individual notes.
Note that that the value 20 was added to the original numbers of Part II.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 I1 --- Paper [1,2] Paper I (1987), or II (1991)
3- 10 A8 --- PKS Name in PKS system (based on B1950 position)
12- 22 A11 --- Jname Name based on J2000 position
25- 26 I2 h RAh ? Right Ascension J2000 (hours)
28- 29 I2 min RAm ? Right Ascension J2000 (minutes)
31- 35 F5.2 s RAs ? Right Ascension J2000 (seconds)
38 A1 --- DE- ? Declination J2000 (sign)
39- 40 I2 deg DEd ? Declination J2000 (degrees)
42- 43 I2 arcmin DEm ? Declination J2000 (minutes)
45- 48 F4.1 arcsec DEs ? Declination J2000 (seconds)
50- 56 F7.2 yr Epoch ? Epoch of radio position
59- 60 I2 h RA(opt)h ? Right Ascension J2000 (hours)
62- 63 I2 min RA(opt)m ? Right Ascension J2000 (minutes)
65- 69 F5.2 s RA(opt)s ? Right Ascension J2000 (seconds)
72 A1 --- DE(opt)- ? Declination J2000 (sign)
73- 74 I2 deg DE(opt)d ? Declination J2000 (degrees)
76- 77 I2 arcmin DE(opt)m ? Declination J2000 (minutes)
79- 82 F4.1 arcsec DE(opt)s ? Declination J2000 (seconds)
84- 90 F7.2 yr Ep(opt) ? Epoch of optical position
--------------------------------------------------------------------------------
Byte-by-byte Description of file: notes.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- Note Note Code, repeated when several lines
5- 80 A76 --- Text Text of Note, including bibcodes
--------------------------------------------------------------------------------
Nomenclature Notes: All sources are from the PKS catalogue (CDS 8015), but
the following sources were renamed (in disagreement with IAU
recommendations) in the present paper:
0601-706 = PKS B0601-705, 0834-729 = PKS B0833-729,
0846-572 = PKS B0847-572, 1134-739 = PKS B1133-739,
1418-782 = PKS B1417-782, 1545-760 = PKS B1546-760,
1649-789 = PKS B1649-788.
History:
Prepared via OCR at CDS. Tables from the two papers were merged
and put in the correct order by RA(1950).
Acknowledgements: We thanks H.Andernach () for
proof-reading and correcting the table. His checks lead to the remarks
mentioned above ("Nomenclature Notes" section).
(End) Francois Ochsenbein [CDS], Heinz Andernach 09-Apr-1997