Extended Data Fig. 5: Quiescent X-ray luminosity as emitted thermally from the surface for different neutron star classes plotted as a function of age.
From: Detection of X-ray emission from a bright long-period radio transient
Circled stars are radio-emitting magnetars. We assume as a luminosity limit for the quiescent emission of ASKAP J1832–0911 that is derived from the deepest XMM-Newton limits on 2011-03-13, and the most recent limits derived after the outburst by Chandra on 2024-08-11 (light blue lines). Solid lines assume an X-ray spectrum modelled by a power law with Γ = 2, while dashed lines assume a blackbody with kT = 0.5 keV. The age refers to the age of the SNR when available, and to the characteristic age otherwise. See10 and Dehman, Marino, and Rea et al., manuscript in preparation for more details on the data extraction and sources.
