High Energy2026-06-071 minarXiv:2606.08598expressAn Invisible Spectral Line Betrays a Magnetic Neutron StarIn galaxy NGC 3583, telescopes detected an unusual X-ray source: its brightness periodically spikes and then fades almost completely.Kiran M. Jayasurya·Aman Upadhyay·Vikram RanaAdam RiessAlbert EinsteinCharles Townesmagnetarneutron star👍👎☆SimplePopularAdvanced