A Catalogue of Radio Sources Between Declinations ?20° and ?50°

Abstract

SummaryA catalogue has been prepared of the radio sources observed between declinations _20 0 and _50 0 , using the Sydney cross-type radio telescope at a wavelength of 3·5 m ; a total of 892 sources is listed. This supplements an earlier catalogue in the declination zone + 10° to _20°. In addition to the positions and intensities of the sources, angular sizes of 50 of the strongest are given: several are found to have a size less than 15" arc. As before, identifications with bright optical objects have been sought, and a number of galaxies of apparently abnormal radio emission listed. Statistical analyses of the distribution of the radio sources give results very similar to those obtained using the earlier catalogue. \Vithin the uncertainty in the data, the distribution appears uniform in depth and there is a siguificantly greater number of sources of large apparent size than expected from chance blending effects.

GALAXY CLUSTERS IN THESWIFT/BURST ALERT TELESCOPE ERA: HARD X-RAYS IN THE INTRACLUSTER MEDIUM

“…The most recent radio data date back to 1977 (Slee 1977) and report S 160 MHz = 6.4 Jy and α = 2, which we use to produce the lower limit on the magnetic field reported in Table 3. The results do not change if we use older radio measurements (e.g., Mills et al 1960;Jones & Finlay 1974;Slee & Higgins 1975).…”

The Molonglo Southern 4 Jy Sample (MS4). I. Definition

“…In defining our sample, we used the MRC in preference to the two previous extensive low-frequency surveys of the southern sky, the Mills, Slee, and Hill (MSH) survey at 85.5 MHz (Mills et al 1958(Mills et al , 1960(Mills et al , 1961 and the Parkes 408 MHz catalogs Price & Milne 1965). Compared with the MRC, the MSH and Parkes catalogs have less uniform sky coverage, lower sensitivity, and higher source confusion due to lower resolution.…”

“…For most sources the only flux density measurements below 178 MHz were those from the 85.5 MHz survey of MSH (Mills et al 1960(Mills et al , 1961) and those at 80 and 160 MHz measured with the Culgoora radioheliograph (Slee & Higgins 1973Slee 1977;revised by Slee 1995). Because of their importance for interpolation, the 85.5 MHz MSH and 80 MHz Culgoora values were compared to look for any systematic differences.…”

“…Column (3).-Name of the source as given in the 85.5 MHz MSH survey (Mills et al 1960(Mills et al , 1961.…”

Revealing the Faraday depth structure of radio galaxy NGC 612 with broad-band radio polarimetric observations

“…2013Feb24), the bandpass calibrator (Schilizzi & McAdam, 1975), 843 MHz (Mauch et al, 2003), 1.425 GHz (Fomalont, 1968), 2.7 GHz (Bolton & Shimmins, 1973) and 5.0 GHz (Wall & Schilizzi, 1979). The figure is truncated and does not show a flux density value of 56 Jy at 85.5 MHz (Mills et al, 1960). Updated flux density values at 408 MHz and 843 GHz were acquired through private communication with Dr. Richard Hunstead.…”