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Fig. 4

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Map estimations of NGC 6946 using a) the pipeline (PL) backprojection method, b) the pipeline model inversion (PLI) (without taking the compression into account), c) averaging compression inversion (ACI), d) Hadamard compression inversion (HCI), and e) reference map without any compression (NOC). Maps are presented on a fourth-root intensity scale. All maps have the same scale.

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