The field of view and flux sensitivity of RATAN-600

Details The field of view and flux sensitivity of RATAN-600 The field of view and flux sensitivity of RATAN-600

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008astbu..63..374m&link_type=abstract

Astrophysical Bulletin, Volume 63, Issue 4, pp.374-385

Astronomy and Astrophysics

Astrophysics

1

95.55.Jz, Radio Telescopes And Instrumentation, Heterodyne Receivers

Scientific paper

The refined data on the diffraction scattering of RATAN-600 allowed the telescope field of view to be increased substantially at large elevations. Amethod, which can be used to reconstruct the parameters of the sources passing at angular distances fromthe beamaxis that are several dozen times greater than the half-power width of the beam, is analyzed. The knowledge about wide scattering of RATAN-600 allowed the noise from background radio sources at zenith to be reduced by one order of magnitude and flux sensitivity of the radio telescope to be increased by the same factor without resorting to two-dimensional mapping. Methods for cleaning one-dimensional records of the RZF survey are suggested that use model scans based on the data of the NVSS survey and MHAT filtering. The latter proved to be an especially efficient tool for suppressing sky noise and identifying sources in the central section of the survey. The flux sensitivity of RATAN-600 is estimated with new opportunities taken into account.

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