A 45-MHz array for radio astronomy

Details A 45-MHz array for radio astronomy A 45-MHz array for radio astronomy

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...140..377m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 140, no. 2, Nov. 1984, p. 377-382. Research supported by the Universidad de Ch

Mathematics

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14

Antenna Arrays, Astronomical Observatories, Radio Telescopes, Antenna Radiation Patterns, Calibrating, Chile, Dipole Antennas, Pulsars

Scientific paper

The instrumentation of a 45-MHz radiotelescope is described and some preliminary observational results are discussed. The telescope is a rectangular filled array of 528 full-wavelength dipoles distributed in six groups and connected to a Butler matrix. The beams are 2.4 deg x 4.6 deg and they are separated by 1.8 deg in declinations. The effective area of the array is 9650 sq m and the system has a noise temperature of about 600 K which should allow a maximum sensitivity on the order of a few Jy. Results from preliminary observations using the device indicate that strong sources can be detected with an accuracy of + or - 1 min. A theoretical N-S power diagram is compared with observational results.

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