A New Referencing Method for the Array On-The-Fly Observation

Details A New Referencing Method for the Array On-The-Fly Observation A New Referencing Method for the Array On-The-Fly Observation

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jkas...38...17c&link_type=abstract

Journal of the Korean Astronomical Society, vol. 38, no. 1, pp. 17-22

Astronomy and Astrophysics

Astronomy

1

Otf Observation, Galaxies : Individual(Ngc 4254), Techniques : Image Processing

Scientific paper

In this paper, we suggest a new referencing method for the array On-The-Fly(OTF) observations in radio astronomy. To reduce the baseline residual, we have proposed and evaluated a new referencing method which uses the source free regions in the observed frame as references. These new references have small triangle t and triangle x, the time and position differences between the source and the references, and the systematic problems were improved by using this new referencing method. The curved baseline residuals were straightened and the rms was reduced to 17 mK. This new referencing method is expected not only to make possible to take more stable data for the array OTF observation of external galaxies but also to save the observation and data reduction time.

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