Radio Frequency Spectra of 388 Bright 74 MHz Sources

Abstract

As a service to the community, we have compiled radio frequency spectra from the literature for all sources within the VLA Low Frequency Sky Survey (VLSS) that are brighter than 15 Jy at 74 MHz. Over 160 references were used to maximize the amount of spectral data used in the compilation of the spectra, while also taking care to determine the corrections needed to put the flux densities from all reference on the same absolute flux density scale. With the new VLSS data, we are able to vastly improve upon previous efforts to compile spectra of bright radio sources to frequencies below 100 MHz because (1) the VLSS flux densities are more reliable than those from some previous low frequency surveys and (2) the VLSS covers a much larger area of the sky (declination >-30 deg.) than many other low frequency surveys (e.g., the 8C survey). In this paper, we discuss how the spectra were constructed and how parameters quantifying the shapes of the spectra were derived. Both the spectra and the shape parameters are made available here to assist in the calibration of observations made with current and future low frequency radio facilities.

arXiv commentAccepted to ApJS

References in corpus (18)

• SUMSS: A Wide-Field Radio Imaging Survey of the Southern Sky. I. Science goals, survey design and instrumentation
• The Cosmic Lens All-Sky Survey: I. Source selection and observations
• A complete sample of GHz-Peaked-Spectrum radio sources and its radio properties
• The Parkes Half-Jansky Flat-Spectrum Sample
• New Catalogs of Compact Radio Sources in the Galactic Plane
• Survey of Instantaneous 1-22 GHz Spectra of 550 Compact Extragalactic Objects with Declinations from -30deg to +43deg
• The 74MHz System on the Very Large Array
• High Frequency Peakers: young radio sources or flaring blazars?
• Radio-loud active galaxies in the northern ROSAT All-Sky Survey. I. Radio identifications
• A Sample of Ultra Steep Spectrum Sources Selected from the Westerbork In the Southern Hemisphere (WISH) survey
• The ATCA Intraday Variability Survey of Extragalactic Radio Sources
• A Dual Frequency, Multi-Year Monitoring Program of Compact Radio Sources
• The radio source population at high frequency: follow-up of the 15-GHz 9C survey
• High-frequency polarization properties of southern Kuhr sources
• Cygnus A: A Long Wavelength Resolution of the Hot Spots
• Observations of the bright radio sources in the North Celestial Pole region at the RATAN-600 radio telescope
• Multi-Frequency Study of the B3--VLA Sample. I. 10.6-GHz Data
• Quasars from the 7C Survey - I:sample selection and radio maps

Cited by in corpus (18)

• Opening the 21cm EoR Window: Measurements of Foreground Isolation with PAPER
• Foreground Model and Antenna Calibration Errors in the Measurement of the Sky-Averaged λ21 cm Signal at z~20
• The Effects of Polarized Foregrounds on 21cm Epoch of Reionization Power Spectrum Measurements
• A Giant Metrewave Radio Telescope/Chandra view of IRAS 09104+4109: A type 2 QSO in a cooling flow
• New 145-MHz Source Measurements by PAPER in the Southern Sky
• Rotation Measure Synthesis of Galactic Polarized Emission with the DRAO 26-m Telescope
• The Global Magneto-Ionic Medium Survey: Polarimetry of the Southern Sky from 300 to 480 MHz
• The peculiar radio galaxy 4C 35.06: a case for recurrent AGN activity?
• Analysing the impact of far-out side-lobes on the imaging performance of the SKA-LOW telescope
• The Global Magneto-Ionic Medium Survey: A Faraday Depth Survey of the Northern Sky Covering 1280-1750 MHz
• Is the Sunyaev-Zeldovich effect responsible for the observed steepening in the spectrum of the Coma radio halo ?
• A GMRT multifrequency radio study of the isothermal core of the poor galaxy cluster AWM 4
• Studying the late evolution of a radio-loud AGN in a galaxy group with LOFAR
• A Newly-Discovered Radio Halo in Merging Cluster MACS J2243.3-0935
• AARTFAAC Flux Density Calibration and Northern Hemisphere Catalogue at 60 MHz
• Limits on long-time-scale radio transients at 150 MHz using the TGSS ADR1 and LoTSS DR2 catalogues
• Studying the highly bent spectra of FR II-type radio galaxies with the KDA EXT model
• Dying Radio Sources in Clusters