Journal of The Korean Astronomical Society (천문학회지)

The Korean Astronomical Society (한국천문학회)
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A NEW REFERENCING METHOD FOR THE ARRAY ON-THE-FLY OBSERVATION

  • Published : 2005.03.01
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Abstract

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 ${\Delta}$t and ${\Delta}$x, the time and position differences between the source and the references, and the systematic problems w~re 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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References

  1. Burke, B. F., & Graham-Smith, F. 1997, An Introduction to radio astronomy (Cambridge University Press)
  2. Cayatte, V., van Gorkom, J. H., Balkowski, C., & Kotanyi, C. 1990, VLA observations of neutral hydrogen in Virgo Cluster galaxies. I - The Atlas, AJ, 100, 604 https://doi.org/10.1086/115545
  3. Chung, E. J. 2003, CO Tully-Fisher Relation in the Cluster Galaxies, M.S. Thesis, Yonsei University
  4. Heyer, M. H., Narayanan, G., & Brewer, M. 2001, On The Fly Mapping at the FCRAO 14m Telescope (User's Manual)
  5. Kenney, J. D. P., & Young, J. S. 1988, CO observations of all Virgo Cluster spiral galaxies brighter than B(T) exp 0 = 12, ApJS, 66, 261 https://doi.org/10.1086/191256
  6. Kim, H. 2003, CO Imaging Survey of Virgo Cluster Spirals, PhD Thesis, Pusan National University
  7. Mangum, J. 1999, On the Fly Observing at the 12m (User's Manual)
  8. Penzias, A. A., & Burrus, C. A. 1973, Millimeter-Wavelength Radio-Astronomy Techniques, ARA&A, 11, 51 https://doi.org/10.1146/annurev.aa.11.090173.000411
  9. Rohlfs, K., & Wilson, T. L. 2000, Tools of radio astronomy (3rd edn; Springer-Verlag)
  10. van der Hulst et al. 1992, in Astronomical Data Analysis Software and Systems I, A.S.P. Conference Series, Vol. 25, 1992, Diana M. Worrall, Chris Biemesderfer, and Jeannette Barnes, eds., p. 131
  11. Young, J. S. et al. 1995, The FCRAO Extragalactic CO Survey. I. The Data, ApJS, 98, 219 https://doi.org/10.1086/192159

Cited by

  1. 12CO(J= 1 – 0) ON-THE-FLY MAPPING SURVEY OF THE VIRGO CLUSTER SPIRALS. I. DATA AND ATLAS vol.184, pp.2, 2009, https://doi.org/10.1088/0067-0049/184/2/199