Image Details
Caption: Figure 5.
Left: image of the J0137-3042 field using four minutes of data over transit. The color scale shows the image made from the LST-binned IDR2 data from HERA, involving 18 days, using a multifrequency synthesis from 120 to 180 MHz. The contours show the J0137 field GLEAM model, passed through the PRISim simulation and HERA telescope model to generate visibilities, then imaged in CASA in the exact same way as for the real data. The contour levels are: −1.0, −0.5, 0.5, 1.0, 1.5, 2.0, 2.5, 5.0, and 10.0 Jy beam−1, and the resolution is 42′ × 33′, PA = 65°. Dash contours are negative. The rms noise level outside the primary beam is 0.4 Jy beam−1. Middle: difference image between model and data. The contour levels are the same as in the left image to indicate quantitatively the relative magnitude of the residual features. Right: image of the same field, but taken from the all-sky, total power image at 408 MHz of Haslam et al. (1982) and Remazeilles et al. (2016).
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