Some Identifications for Weak Sources in the Parkes Catalogue for Declinations +20° to ?20°

Bolton, J. G.; Wall, J. V.; Shimmins, AJ

doi:10.1071/ph710889

Cited by 6 publications

(2 citation statements)

References 3 publications

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“…In such cases the presence of a flux in the "core" column indicates we have chosen to use it in the construction of the energy distribution. Wright et al 1991;(30) Jagers et al 1982;(31) Bolton et al 1971;(32) Shimmins et al 1966;(33) Barvainis & Antonucci 1989. Hale UKIRT UKIRT NRAO IRAM IRAM NRAO IRAM Hale IRAM IRAM IRAM NRAO Hale 10 5 2 2 6 10 3 7 12 11 1 3 10 1 10 10 3 10 7 9 8 8 10 4 4 4 4 4 5 3 3 10 1 7 5 5 12 10 7 References.- 1 gave similar results, but the de Vaucouleurs law was a worse fit to a few of the objects for which detailed profiles were available-although we might expect the law to be a better representation for those objects whose host galaxies are elliptical.…”

Section: Host Galaxiesmentioning

confidence: 99%

Atlas of quasar energy distributions

Elvis

Wilkes

McDowell

et al. 1994

ApJS

1,716

202

2,453

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We present an atlas of the spectral energy distributions (SEDs) of normal, nonblazar, quasars over the whole available range (radio to 10 keV X-rays) of the electromagnetic spectrum. The primary (UVSX) sample includes 47 quasars for which the spectral energy distributions include X-ray spectral indices and UV data. Of these, 29 are radio quiet, and 18 are radio loud. The SEDs are presented both in figures and in tabular form, with additional tabular material published on CD-ROM. Previously unpublished observational data for a second set of quasars excluded from the primary sample are also tabulated. The effects of host galaxy starlight contamination and foreground extinction on the UVSX sample are considered and the sample is used to investigate the range of SED properties. Of course, the properties we derive are influenced strongly by the selection effects induced by quasar discovery techniques. We derive the mean energy distribution (MED) for radio-loud and radio-quiet objects and present the bolometric corrections derived from it. We note, however, that the dispersion about this mean is large (-one decade for both the infrared and ultraviolet components when the MED is normalized at the near-infrared inflection). At least part of the dispersion in the ultraviolet may be due to time variability, but this is unhkely to be important in the infrared. The existence of such a large dispersion indicates that the MED reflects only some of the properties of quasars and so should be used only with caution. Subject headings: atlases-galaxies: photometry-quasars: general

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Section: Host Galaxiesmentioning

confidence: 99%

Atlas of quasar energy distributions

Elvis

Wilkes

McDowell

et al. 1994

ApJS

1,716

202

2,453

View full text Add to dashboard Cite

show abstract

“…GLEAM J004246-061325 (PKS 0040-06) This GLEAM source corresponds to the northern hotspot of a wide double with a total angular extent of the radio source of at least 6 arcmin.The radio position listed by van Velzen et al (2015) for this source (J2000: 00 42 45.77 -06 12 41.3) also corresponds to the northern hotspot rather than the whole source. The correct optical identification (with a 17th magnitude galaxy) was first made by Bolton et al (1971). The position listed in columns 9 and 10 of Table 3 is that of the optical galaxy, rather than the FIRST radio centroid.…”

Section: Gleam J003242-123339 (Pmn J0032-1233)mentioning

confidence: 99%

Interplanetary scintillation studies with the Murchison Wide-field Array – IV. The hosts of sub-arcsecond compact sources at low radio frequencies

Sadler

Chhetri

Morgan

et al. 2018

Monthly Notices of the Royal Astronomical Society

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Around 10% of bright low-frequency radio sources observed with the Murchison Widefield Array (MWA) show strong Interplanetary Scintillation (IPS) on timescales of a few seconds, implying that almost all their low-frequency radio emission comes from a compact component less than 0.5 arcsec in angular size. Most of these objects are compact steep-spectrum (CSS) or MHz-peaked spectrum (MPS) radio sources. We have used mid-infrared data from the Wide-field Infrared Survey Explorer (WISE) catalogue to search for the host galaxies of 65 strongly-scintillating MWA sources and compare their properties with those of the overall population of bright low-frequency radio sources. We identified WISE mid-infrared counterparts for 91% of the bright sources in a single 900 deg 2 MWA field, and found that the hosts of the stronglyscintillating sources were typically at least 1 mag fainter in the WISE W1 (3.4 µm) band than the hosts of weakly-scintillating MWA sources of similar radio flux density. This difference arises mainly because the strongly-scintillating sources are more distant. We estimate that strongly-scintillating MWA sources have a median redshift of z ∼ 1.5, and that at least 30% of them are likely to lie at z > 2. The recently-developed wide-field IPS technique therefore has the potential to provide a powerful new tool for identifying high-redshift radio galaxies without the need for radio spectral-index selection.

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Stars and continuous objects among optically idetified extragalactic radio sources

Nebelitskii¹,

Somov²,

Somova³

et al. 1981

Astrophysics

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Some Identifications for Weak Sources in the Parkes Catalogue for Declinations +20° to ?20°

Abstract: Accurate positions and flux densities at 2700 MHz have been measured for 156 weak sources in the Parkes catalogue for declinations 0� to +20� and 0� to -20�. Identifications are suggested for 22 of the sources, 6 with galaxies and 16 with possible quasi. stellar objects.

Cited by 6 publications

References 3 publications

Atlas of quasar energy distributions

Atlas of quasar energy distributions

Interplanetary scintillation studies with the Murchison Wide-field Array – IV. The hosts of sub-arcsecond compact sources at low radio frequencies

Stars and continuous objects among optically idetified extragalactic radio sources

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