Extended Data Fig. 4: Sidelobe contribution to the integrated HI emission in the velocity range of 6550–6750 km s−1.
From: A 0.6 Mpc H i structure associated with Stephan’s Quintet
False color image of the sidelobe contribution overlaid by the contour map of integrated HI emission in the velocity range of 6550–6750 km s−1 (before the sidelobe correction and after the convolution by a Gaussian kernel of FWHM = 2.8'). The contours start from 20 mJy km s−1 beam−1 (corresponding to NHI = 7.4 × 1017 cm−2 for the original beam of FWHM = 2.9') with an increment of a factor of 2.
