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The Precision and Accuracy of Early Epoch of Reionization Foreground Models: Comparing MWA and PAPER 32-antenna Source Catalogs

  • Authors: Daniel C. Jacobs, Judd Bowman, and James E. Aguirre

Jacobs, Bowman, & Aguirre 2013 The Astrophysical Journal 769 5.

  • Provider: AAS Journals

Caption: Figure 3.

Side-by-side comparison of two previously known sources (L:0859-257, R:0745-191) extracted from the mosaics in Figure 2. For each source, PAPER is on the left and MWA is on the right with MWA32 catalog sources marked with an X; PSA32 listed the position and amplitude of the peak within 30′ of the image center. The left source provides examples of errors from both instruments. The MWA catalog lists two sources separated by 1 farcm4, or 10% of a synthesized beam, which were even given the same truncated J2000 name. Meanwhile, the PAPER image, having not been cleaned to this flux level, has larger sidelobes. Together these effects contribute to a 180% flux scale between the two (28 Jy for PAPER, (43+6) Jy for MWA). However, differences in deconvolution do not preclude an accurate comparison as shown on the right, where a source has multiple confused components yet the PAPER flux is within 17% of the MWA flux.

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