Radio Continuum Observations of Maffei 2

Details Radio Continuum Observations of Maffei 2 Radio Continuum Observations of Maffei 2

May 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971natur.231...36w&link_type=abstract

Nature, Volume 231, Issue 5297, pp. 36 (1971).

Astronomy and Astrophysics

Astronomy

2

Scientific paper

WE have mapped the area containing the suspected galaxies Maffei 1 and 2 at a wavelength of 11 cm with half-power beam-width 5'.0 using the 300 foot transit telescope of the National Radio Astronomy Observatory at Green Bank, West Virginia, from January 28 to 31, 1971. A three-feed system with four receivers was used; the centre feed provided independent right-and left-hand circularly polarized beams at the same point in the sky, and two outrigger beams (2' north and 2' south of the centre beam) each received right hand circularly polarized radiation. Several transits with the telescope set at different declinations provided full mapping of an area between right ascensions 02 h 25 m and 02 h 43 m (1950.0) and between declinations + 59° 15' and 59° 33' (1950.0). The output of the radiometers was recorded every 4 s. With the parametric amplifiers used, the lower flux density limit was set by confusion rather than by system noise. We estimate that the lower flux density limit for detection of a point source is 0.06 f.u.

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