The Puzzling Source at the Center of the SNR RCW 103

A. Borghese, N. Rea, F. Coti Zelati, P. Esposito

    Research output: Contribution to journalArticleResearchpeer-review


    © 2018 International Astronomical Union. 1E 161348-5055 (1E 1613), the source at the center of the supernova remnant RCW 103, has defied any easy classification since its discovery, owing to its long-term variability (a factor of ∼ 100 in flux on time scales from months to years) and a periodicity of 6.67 hr with a variable light curve profile across different flux levels. On June 2016, 1E 1613 emitted a magnetar-like millisecond burst of hard X-rays accompanied with a factor ∼ 100 brightening in the persistent soft X-ray emission. The duration and spectral decomposition of the burst, the discovery of a hard X-ray tail in the spectrum, and the long-term outburst history suggest that 1E 1613 is an isolated magnetar and the periodicity of 6.67 hr is the rotational spin period, making 1E 1613 the slowest neutron star ever detected.
    Original languageEnglish
    Pages (from-to)104-107
    JournalProceedings of the International Astronomical Union
    Issue numberS337
    Publication statusPublished - 1 Sep 2017


    • X-rays: stars
    • stars: individual (1E 161348-5055)
    • stars: neutron


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