| Issue |
A&A
Volume 474, Number 3, November II 2007
|
|
|---|---|---|
| Page(s) | 1093 - 1100 | |
| Section | Online catalogs and data | |
| DOI | https://doi.org/10.1051/0004-6361:20078034 | |
| Published online | 23 October 2007 | |
30 GHz flux density measurements of the Caltech-Jodrell flat-spectrum sources with OCRA-p*
1
University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire SK11 9DL, UK e-mail: Stuart.Lowe@manchester.ac.uk
2
Toruń Centre for Astronomy, Nicolaus Copernicus University, 87-148 Toruń/Piwnice, Poland
Received:
7
June
2007
Accepted:
23
July
2007
Aims.To measure the 30-GHz flux densities of the 293 sources in the Caltech-Jodrell Bank flat-spectrum (CJF) sample. The measurements are part of an ongoing programme to measure the spectral energy distributions of flat spectrum radio sources and to correlate them with the milliarcsecond structures from VLBI and other measured astrophysical properties.
Methods.The 30-GHz data were obtained with a twin-beam differencing radiometer system mounted on the Toruń 32-m telescope. The system has an angular resolution of 1.2´.
Results.Together with radio spectral data obtained from the literature, the 30-GHz data have enabled us to identify 42 of the CJF sources as Giga-hertz Peaked Spectrum (GPS) sources. Seventeen percent of the sources have rising spectra (α > 0) between 5 and 30 GHz.
Key words: astronomical data bases: miscellaneous / radio continuum: galaxies
© ESO, 2007
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.