The 1–10 keV X-ray vs. 5 GHz radio luminosity (L_R–L_X) plane for accreting systems (see, e.g., A. Bahramian & A. Rushton 2022). Gray circles represent hard-state black hole LMXBs, blue squares denote hard-state neutron star LMXBs, pink stars indicate accreting millisecond X-ray pulsars (AMXPs), and light green upward triangles correspond to transitional millisecond pulsars (tMSPs). EP250916a is shown with magenta pluses, indicating 3σ radio upper limits at T₀+11.4 days, assuming distances of 1.3, 8, 12, and 20 kpc.