Observations of Ohio-survey radio sources at 430 MHz
Abstract
The 1000-ft radio telescope of the Arecibo Observatory has been used at 430 MHz to measure flux densities and positions of 259 weak sources in the Ohio State 1415-MHz catalog. Comparison of their 430-MHz and 1415-MHz flux densities shows that 87 of the 259 appear to have spectra which are either flat or show a low-frequency cutoff. The higher resolution of the Arecibo telescope in declination has allowed an estimate of the effect of confusion on the Ohio survey; 31 % of the sources were found to be blends of two or more sources. Only three sources were not found, and these may have low-frequency spectral cutoffs.
- Publication:
-
The Astronomical Journal
- Pub Date:
- May 1973
- DOI:
- 10.1086/111415
- Bibcode:
- 1973AJ.....78..285S