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J/A+A/386/97 The Parkes quarter-Jansky flat-spectrum sample (Jackson+, 2002)
The Parkes quarter-Jansky flat-spectrum sample. I. Sample selection and source identifications. Jackson C.A., Wall J.V., Shaver P.A., Kellermann K.I., Hook I.M., Hawkins M.R.S. <Astron. Astrophys. 386, 97 (2002)> =2002A&A...386...97J
ADC_Keywords: QSOs ; Radio sources ; Galaxy catalogs Keywords: catalogues - radio continuum: galaxies - BL Lac objects: general - galaxies: general - quasars: general Abstract: We present a new sample of quarter-Jansky flat-spectrum radio sources selected to search for high-redshift quasars and to study the evolution of the flat-spectrum quasar population. The sample comprises 878 radio sources selected from the Parkes catalogues with spectral indices α5GHz2.7GHz≥-0.4 where S_ν∝ν^α. The sample covers all right ascensions and the declination range from -80.0° to +2.5°, excluding low galactic latitudes (|b|<10°) and the Magellanic Cloud regions. We have obtained improved radio source positions, firstly to reconfirm the majority of the existing identifications, and secondly, using digitized sky-survey data and deep B, Gunn-i and Gunn-z CCD-imaging, to find optical identifications for 223 previously-unidentified sources. We present the final catalogue of 878 flat-spectrum sources: 827 are compact radio sources identified with galaxies, quasars and BL Lac objects, 38 have either extended radio structure or are identified with Galactic objects (PN, HII or non-compact radio source), 4 are obscured by Galactic stars, and 9 (1 per cent of the total sample) remain unidentified. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 126 878 The complete catalogue of the Parkes quarter-Jansky sample (Appendix A) notes.dat 80 487 Individual notes (Appendix B) refs.dat 116 84 References
See also: VIII/15 : Parkes Radio Sources Catalogue (PKSCAT90) (Wright+ 1990) VIII/34 : Parkes Half-Jansky Flat-Spectrum Sample (Drinkwater + 1997) VIII/38 : Parkes-MIT-NRAO 4.85GHz (PMN) Surveys (Griffith+ 1993-1996) J/MNRAS/328/17 : Parkes Multi-Beam Pulsar Survey (Manchester+, 2001) Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- PKS 5- 13 A9 --- PKS PKS (BHHMM-DDD) designation 15- 16 I2 h RAh PKSCAT90 right ascension (B1950) 18- 19 I2 min RAm PKSCAT90 right ascension (B1950) 21- 24 F4.1 s RAs PKSCAT90 right ascension (B1950) 26 A1 --- DE- PKSCAT90 declination sign (B1950) 27- 28 I2 deg DEd PKSCAT90 declination (B1950) 30- 31 I2 arcmin DEm PKSCAT90 declination (B1950) 33- 34 I2 arcsec DEs PKSCAT90 declination (B1950) 36- 37 I2 h RArh ? New radio right ascension (B1950) 39- 40 I2 min RArm ? New radio right ascension (B1950) 42- 46 F5.2 s RArs ? New radio right ascension (B1950) 48 A1 --- DEr- New radio declination sign (B1950) 49- 50 I2 deg DErd ? New radio declination (B1950) 52- 53 I2 arcmin DErm ? New radio declination (B1950) 55- 58 F4.1 arcsec DErs ? New radio declination (B1950) 60 A1 --- n_RArh Origin of the new radio position (1) 62- 63 A2 --- n_Ident Origin of identification (2) 65- 67 A3 --- Ident Identification (3) 69- 72 F4.1 s oRA ? Radio-optical offset in RA of candidate identification (for rIdent = 1c, 2 and 3) 74- 77 F4.1 arcsec oDE ? Radio-optical offset in DE of candidate identification (for rIdent = 1c, 2 and 3) 79 A1 --- l_Bmag Limit flag on Bmag 80- 83 F4.1 mag Bmag ? B or B_J_ magnitude (4) 84 A1 --- n_Bmag [:] Note on Bmag (5) 86- 89 F4.1 mag imag ? Gunn i (instrumental) magnitude 91- 94 F4.1 mag zmag ? Gunn z (instrumental) magnitude 96 A1 --- l_z Limit flag on z 97-101 F5.3 --- z ? Redshift 102 A1 --- u_z [:] : for PKSCAT90 redshift untraceable in the literature 104-105 I2 --- r_z ? Reference for redshift, in refs.dat file 107-111 F5.2 Jy S2.7GHz PKSCAT90 Flux density at 2.7GHz 113-117 F5.2 Jy S5GHz PKSCAT90 Flux density at 5GHz 119-122 F4.2 Jy Limit PKSCAT90 area survey limit at 2.7GHz 124 A1 --- f_PKS [X] Exclusion flag (6) 126 A1 --- Note [*] *: note detailed in notes.dat file
Note (1): Origin of the new radio position: A : ATCA observation for this project C : ATCA calibrator (ftp.atnf.csiro.au/pub/atnfdocs/guides/at.cat) H : R Hunstead, private communication N : NVSS catalogue (Condon et al., 1998AJ....115.1693C) P : A Patnaik, private communication R : J Reynolds, private communication S : A Savage, private communication T : N Tasker, private communication V : VLA observation for this project W : White (1992, Cat. J/other/PASAu/10.140) Note (2): Origin of identification: 1: Reconfirmed PKSCAT90 identification based on the following: 1a: Sky survey data and the best radio position available as shown in the table. No offsets (radio - optical) have been determined for these sources. 1b: COSMOS sky survey and the best radio position available as shown in the table. Identification offsets (radio - optical) have been determined for these sources. 1c: CCD imaging and the best radio position available as shown in the table. Identification offsets (radio - optical) have been determined for these sources. 2: A new identification by this project using the COSMOS database 3: A new identification by this project using CCD-imaging. Note (3): Identification: Q: confirmed quasar by spectroscopy or UVX photometry Q*: stellar object based on positional coincidence with accurate (post-PKSCAT90) radio position, although no spectrum or UVX confirmation. Q?: PKS radio position coincident with stellar object. No spectroscopy/UVX confirmation. BL: spectroscopically-confirmed BL Lac object. G: Galaxy with morphological or spectroscopic confirmation. G?: probably a galaxy based on optical colour or morphology. X: no identification, was previously a PKSCAT90 empty-field source. e: the best radio invalidates the PKSCAT90 identification in that there is no optical source at the best radio position. Ob: radio position obscured by foreground star. NCS: Non-compact radio source. The source is either a steep-spectrum or extended radio source. Refer to individual notes for full details (Appendix B). PN: Planetary nebula. HII: HII region. Note (4): B or BJ magnitude: For n_Ident = 1: B or BJ magnitude from PKSCAT90 For n_Ident = 2: BJ magnitude from COSMOS For n_Ident = 3: B magnitude from our CCD-imaging Note (5): Uncertainty flag on Bmag: If ':', magnitude are either (i) estimated (ii) untraceable in the literature although given in PKSCAT90 or (iii) too close to the DSS plate limit to be reliable. Note (6): Exclusion flag: If "X", then this source is excluded from our complete sample due to one of the following conditions: - Source is non-compact radio source (NCS) as shown in "Ident" and the individual notes for that source. - Source flux density at 2.7GHz is below the survey area flux density limit (S2.7GHz < Slim,2.7GHz) - Source is steep-spectrum as described in detailed notes for that source. - Source is outside of the original Parkes survey areas (in area 'X' of Table 2). In this case Slim,2.7GHz is also set to 0.0.
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 9 A9 --- PKS PKS (BHHMM+DDD) designation 11- 80 A70 --- Note Test of the note
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Ref Reference code 4- 22 A19 --- BibCode BibCode 24- 49 A26 --- Aut Author's name 51-116 A66 --- Com Comments
History: From electronic version of the journal * 20-Jul-2002: the note about PKS B0008-222 has been added (was missing)
(End) Patricia Bauer [CDS] 29-Apr-2002
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