Speaker
Description
Swift J1818.0-1607 is a rapidly rotating magnetar (P ~ 1.36 s) that was discovered in March 2020 during an outburst. Follow-up radio observations confirmed its nature and identified it as the sixth radio-loud magnetar known to date. Swift J1818.0-1607 is also one of the most rapidly spinning magnetars and one of the youngest neutron stars in the galaxy. In this talk, I will present the results of X-ray observations of Swift J1818.0-1607 using the XMM-Newton, NuSTAR, and Swift telescopes. These observations allowed us to study its spectral and temporal properties in great detail during the first 7 months of its outburst. Additionally, we conducted a long-term study of the flux and the spectral evolution over the first 19 months of the outburst. This study revealed a decrease in luminosity by a factor of about 90 over 1.5 years since the outburst onset. We also observed Swift J1818.0-1607 with the VLA, which allowed us to detect the radio counterpart of the magnetar and a half-ringlike structure of bright diffuse radio emission. We suggest that this radio structure may be associated with a supernova remnant.
