Extended Data Figure 1: Two example spectra (black lines) and their kinematic fits (red lines).
From: A supermassive black hole in an ultra-compact dwarf galaxy
Residuals for both spectra are shown in green. The top spectrum is from one of the central-most pixels and is the spectrum from a single 0.05′′ × 0.05′′ pixel. The bottom spectrum is at a radius of 0.4′′ and is the sum of 17 spatial pixels. Signal-to-noise ratios are given per resolution element. The contrast in dispersion is seen very clearly, with broad smooth lines in the top spectrum and sharper lines in the bottom. Both spectra were normalized to one; the central spectrum was then offset by +1 for visibility. The residuals were offset by 0.5 and 1.5.
