Ultra-steep spectrum radiosources (Roettgering+, 1994)

Details Ultra-steep spectrum radiosources (Roettgering+, 1994) Ultra-steep spectrum radiosources (Roettgering+, 1994)

Aug 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ycat..41080079r&link_type=abstract

VizieR On-line Data Catalog: J/A+AS/108/79. Originally published in: 1994A&AS..108...79R

Physics

Radio Sources

Scientific paper

Radio sources with ultra-steep spectra (USS; spectral index <~ -1.0) have been found to be excellent tracers of galaxies at redshifts z>~2. The samples are selected from the set of catalogues referenced below, in a range of frequencies from 38 to 408MHz; they are are fainter by a factor of three than the previously well-studied samples of USS sources from 4C. Snapshot observations of sources from these samples have been made with the VLA at 1.5arcsec resolution and are presented in the printed paper. The list of the sources (Appendix A of the paper) includes positions, flux densities and radio structures for a total number of 605 sources derived from these observations. (1 data file).

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