摘要
Magnetars are highly magnetized neutron stars that exhibit diverse and often variable emission across the electromagnetic spectrum, including rare but exceptionally bright radio emission. However, their broadband radio spectra remain poorly characterized, with only a few sources studied in detail. Several radio magnetars show complex spectral structures, such as peaks at a few GHz and a few hundred GHz, and a dip around 20 to 50 GHz. These features are not yet fully accounted for in existing models of magnetar radio emission. We propose simultaneous observations of the radio magnetar 1E 1547.0-5408 using ATCA and Murriyang (Parkes). Our program will provide continuous frequency coverage from 0.7 to 96 GHz by combining Parkes' UWL receiver with ATCA's higher frequency bands. In addition, we plan to submit a complementary ALMA proposal to cover the 100 to 300 GHz range, enabling a complete view of the sub-millimeter component. This coordinated setup will allow us to accurately measure the broadband spectral shape, identify the locations of spectral peaks and dips, and probe the underlying magnetospheric emission mechanisms, providing strong constraints for theoretical modeling. Additionally, the Parkes observations will capture individual pulses from 1E 1547.0-5408, allowing us to compare their properties to those of SGR 1935+2154, a known Galactic FRB source, and explore potential links between other radio magnetars and FRBs. Following this initial campaign, we will propose a long-term wide-band monitoring program to track spectral evolution, as well as target-of-opportunity observations of other currently inactive radio magnetars, building toward a comprehensive understanding of the radio-emitting magnetar population.