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Fig. 26


Example of LOFAR single sub-band (0.2 MHz bandwidth) imaging of the radio galaxy Cygnus A with the HBA system at 150 MHz (top) and the LBA system at 74 MHz (bottom), made using 24 core stations and 9 remote stations during the commissioning phase (McKean et al., in prep.). Both datasets consist of 12 h synthesis observations. These images show the expected combination of compact and extended structure that has previously been seen in this source at these frequencies using the VLA and MERLIN, cf. with the images of Lazio et al. (2006) and Leahy et al. (1989), respectively. The beam-size of the images are 5.7 × 3.5 arcsec and 11.7 × 7.4 arcsec, respectively, and are shown as the white ellipses in the bottom left corner of each image. The dynamic ranges are ~3500 and ~2000 for the 74 MHz and 150 MHz maps, respectively.

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