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Title:
The Parkes Half-Jansky Flat-Spectrum Sample
Authors:
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.
Affiliation:
AA(Anglo-Australian Observatory, Coonabarabran, New South Wales 2357, Australia ), AB(School of Physics, University of Melbourne, Parkville, Victoria 3052, Australia ), AC(School of Physics, University of Melbourne, Parkville, Victoria 3052, Australia ), AD(National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USA ), AE(Anglo-Australian Observatory, Coonabarabran, New South Wales 2357, Australia ), AF(Australia Telescope National Facility, PO Box 76, Epping, New South Wales 2121, Australia ), AG(Physics Department, University of Tasmania, GPO Box 252C, Hobart, Tasmania 7001, Australia ), AH(Mt Stromlo & Siding Spring Observatories, Australian National University, Private Bag, Weston Creek, ACT 2611, Australia), AI(Anglo-Australian Observatory, Coonabarabran, New South Wales 2357, Australia )
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 284, Issue 1, pp. 85-125. (MNRAS Homepage)
Publication Date:
01/1997
Origin:
MNRAS
MNRAS Keywords:
CATALOGUES, BL LACERTAE OBJECTS: GENERAL, GALAXIES: GENERAL, QUASARS: GENERAL, RADIO CONTINUUM: GALAXIES.
Bibliographic Code:
1997MNRAS.284...85D

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 0.5Jy at 2.7GHz, a spectral index measured between 2.7 and 5.0GHz of alpha_2.7/5.0>-0.5, where S(nu)~nu ^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 digitized 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.

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