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Techniques for Mapping Galactic SNRs with the MOST

  • R. S. Roger (a1), D. K. Milne (a1), K. J. Wellington (a1), R. F. Haynes (a1) and M. J. Kesteven (a1)...

Extract

The Molonglo Observatory synthesis telescope (MOST) of the University of Sydney (Mills 1981) produces maps of the 843 MHz continuum emission from fields of width 23′, 46′ or 70′ arc. The telescope comprises two co-linear east-west cylindrical paraboloids each 2186λ in length and separated by a gap of 43λ. For each paraboloid a phasing network (Durdin et al. 1984) generates a comb of 64 contiguous fan beams. Mapping is accomplished in real time during a 12-h observation by overlaying, in the map plane, the instantaneous cross-correlations of corresponding beams. The synthesized point-source response (beam) produced by this method has a width of 43″ (E-W) by 43″ cosec δ (N-S).

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Copyright

References

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Crawford, D. F., in Indirect Imaging (ed. Roberts, J. A.), p. 373 (Cambridge University Press) (1984).
Durdin, J. M., Large, M. I., and Little, A. G., ibid, p. 75.
Kesteven, M. J., ibid, p. 261.
Mills, B. Y., Proc. Astron. Soc. Aust., 4, 156 (1981).

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