The soft-X-ray emission of Ark 120. XMM–Newton, NuSTAR, and the importance of taking the broad view
The soft-X-ray emission of Ark 120. XMM–Newton, NuSTAR, and the importance of taking the broad view
We present simultaneous XMM-Newton and NuSTAR observations of the `bare' Seyfert 1 galaxy, Ark 120, a system in which ionized absorption is absent. The NuSTAR hard X-ray spectral coverage allows us to constrain different models for the excess soft X-ray emission. Among phenomenological models, a cutoff power law best explains …