Looking into the faintEst WIth MUSE (LEWIS): Exploring the nature of ultra-diffuse galaxies in the Hydra-I cluster - IV. A study of the globular cluster population in four ultra-diffuse galaxies

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Fig. 3.

Signal-to-noise ratio estimates as a function of aperture radius for a compact source of m_H ∼ 20 mag. The red dashed line indicates the adopted aperture radius and the point where the S/N profile peaks before decreasing due to the inclusion of additional background noise. The pixel scale is $0 \overset{″}{.} 2$ $0{{\overset{\prime\prime}{.}}}2$ /pixel.

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