Experimental study of a 45-MHz array for radio astronomy

A 45-MHz continuum survey of the southern hemisphere

“…Similar procedure have been followed by Yates & Wielebinski (1966) and Briddle & Purton (1968). As it is explained in detail elsewhere (Alvarez et al 1994), contrary to what we had assumed at first from a study of the antenna pattern near the zenith, we found by precise measurements that the separation between beams is not constant at 1.8…”

“…• toward the east (Alvarez et al 1994). These parameters were used to correct the observed right ascensions.…”

“…Since the instrument has been described in detail elsewhere (May et al 1984;Alvarez et al 1994), only a brief description will be given here. The main parameters of the array are presented in Table 2.…”

All-sky Galactic radiation at 45 MHz and spectral index between 45 and 408 MHz

“…A full description of the instrument was given by May et al (1984) and an experimental determination of the beam in Alvarez et al (1994). The northern data were taken in the periods of 1985-1989 and 1997-1999 with the MU radar array (Fukao et al 1985a,b) at an angular resolution of 3.6…”

“…The southern map data were observed between 1982 and 1994 with an array of 528 E-W dipoles that produced an effective beam of 4.6 • (α) × 2.4 • (δ) FWHM. A full description of the instrument was given by May et al (1984) and an experimental determination of the beam in Alvarez et al (1994). The northern data were taken in the periods of 1985-1989 and 1997-1999 with the MU radar array (Fukao et al 1985a,b) at an angular resolution of 3.6 • × 3.6 • .…”