The Parkes quarter-Jansky flat-spectrum sample - I. Sample selection and source identifications

被引:76
作者
Jackson, CA [1 ]
Wall, JV
Shaver, PA
Kellermann, KI
Hook, IM
Hawkins, MRS
机构
[1] Australian Natl Univ, Mt Stromlo Observ, Res Sch Astron & Astrophys, Canberra, ACT, Australia
[2] Univ Oxford, Dept Astrophys, Nucl & Astrophys Lab, Oxford OX1 3RH, England
[3] European So Observ, D-85748 Garching, Germany
[4] Natl Radio Astron Observ, Charlottesville, VA 22903 USA
[5] Royal Observ, Edinburgh EH3 9HJ, Midlothian, Scotland
来源
ASTRONOMY & ASTROPHYSICS | 2002年 / 386卷 / 01期
关键词
catalogues; radio continuum : galaxies; BL Lac objects : general; galaxies : general; quasars : general;
D O I
10.1051/0004-6361:20020119
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present a new sample of quarter-Jansky at-spectrum radio sources selected to search for high-redshift quasars and to study the evolution of the at-spectrum quasar population. The sample comprises 878 radio sources selected from the Parkes catalogues with spectral indices alpha(2.7 GHz)(5 GHz) greater than or equal to -0.4 where Snu proportional to nu(alpha). The sample covers all right ascensions and the declination range from -80.degrees0 to +2.degrees5, excluding low galactic latitudes (\b\ < 10 degrees) 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 at-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.
引用
收藏
页码:97 / 113
页数:17
相关论文
共 127 条
[31]  
DEKKER H, 1984, MESSENGER, V37, P7
[32]  
DEVAUCOULEURS G, 1991, REFERENCE CATALOGUE, P14
[33]   THE PARKES SELECTED REGIONS - POWERFUL RADIO GALAXIES AND QUASARS AT HIGH REDSHIFTS [J].
DOWNES, AJB ;
PEACOCK, JA ;
SAVAGE, A ;
CARRIE, DR .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1986, 218 (01) :31-&
[34]   THE SUPERGALACTIC PLANE REDSHIFT SURVEY [J].
DRESSLER, A .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1991, 75 (02) :241-271
[35]   USING THE COSMOS/UKST SOUTHERN SKY OBJECT CATALOG [J].
DRINKWATER, MJ ;
BARNES, DG ;
ELLISON, SL .
PUBLICATIONS ASTRONOMICAL SOCIETY OF AUSTRALIA, 1995, 12 (02) :248-257
[36]   The Parkes half-jansky flat-spectrum sample [J].
Drinkwater, MJ ;
Webster, RL ;
Francis, PJ ;
Condon, JJ ;
Ellison, SL ;
Jauncey, DL ;
Lovell, J ;
Peterson, BA ;
Savage, A .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1997, 284 (01) :85-125
[37]   THE PARKES SELECTED REGIONS - DEEP OPTICAL AND INFRARED OBSERVATIONS OF RADIO GALAXIES AND QUASARS AT HIGH REDSHIFTS [J].
DUNLOP, JS ;
PEACOCK, JA ;
SAVAGE, A ;
LILLY, SJ ;
HEASLEY, JN ;
SIMON, AJB .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1989, 238 (03) :1171-&
[38]  
EKERS RD, 1973, ASTRON ASTROPHYS, V24, P247
[39]   DOUBLE-PEAKED EMISSION-LINES IN ACTIVE GALACTIC NUCLEI [J].
ERACLEOUS, M ;
HALPERN, JP .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1994, 90 (01) :1-30
[40]   REDSHIFT OBSERVATIONS IN THE HYDRA CENTAURUS REGION [J].
FAIRALL, AP ;
WILLMER, CNA ;
CALDERON, JH ;
LATHAM, DW ;
DACOSTA, LN ;
PELLEGRINI, PS ;
NUNES, MA ;
FOCARDI, P ;
VETTOLANI, G .
ASTRONOMICAL JOURNAL, 1992, 103 (01) :11-27