C.-Y. Chu (National Tsing Hua University); C.-Y. Ng (University of Hong Kong); Albert K. H. Kong (National Tsing Hua University); H.-K. Chang (National Tsing Hua University)
Magnetars are isolated neutron stars with strong magnetic fields. They manifest themselves as Soft Gamma Repeaters (SGRs) or Anomalous X-ray Pulsars (AXPs) in observations. In this paper, we report the radio spectra of two radio-loud magnetars, 1E 1547.0-5408 and PSR J1622-4950. The radio spectrum of 1E 1547.0-5408 was known to be flat in the range of 1.4-45 GHz. PSR J1622-4950 is the first magnetar discovered in radio and showed an inverted spectrum in the cm band. Using ATCA and ALMA, we obtained flux density measurements of 1E 1547.0-5408 and PSR J1622-4950 to show their spectral behavior at higher frequency.