Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:0707.3418)
· On-line Data
· References in the article
· Citations to the Article (3) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (355)
· NED Objects (388)
· Associated Articles
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Radio Frequency Spectra of 388 Bright 74 MHz Sources
Authors:
Helmboldt, J. F.; Kassim, N. E.; Cohen, A. S.; Lane, W. M.; Lazio, T. J.
Affiliation:
AA(Naval Research Laboratory, Code 7213, 4555 Overlook Avenue SW, Washington, DC 20375-5351 .), AB(Naval Research Laboratory, Code 7213, 4555 Overlook Avenue SW, Washington, DC 20375-5351 .), AC(Naval Research Laboratory, Code 7213, 4555 Overlook Avenue SW, Washington, DC 20375-5351 .), AD(Naval Research Laboratory, Code 7213, 4555 Overlook Avenue SW, Washington, DC 20375-5351 .), AE(Naval Research Laboratory, Code 7213, 4555 Overlook Avenue SW, Washington, DC 20375-5351 .)
Publication:
The Astrophysical Journal Supplement Series, Volume 174, Issue 2, pp. 313-336. (ApJS Homepage)
Publication Date:
02/2008
Origin:
UCP
ApJ Keywords:
Catalogs, Radio Continuum: General, Surveys
DOI:
10.1086/521829
Bibliographic Code:
2008ApJS..174..313H

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 on 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 (δ>-30deg) 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.

Associated Articles

Source Paper     Catalog Description    

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints