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arXiv · 1702.02127

The effect of X-ray dust-scattering on a bright burst from the magnetar 1E 1547.0-5408

Fabio Pintore·Sandro Mereghetti·Andrea Tiengo·Giacomo Vianello·Elisa Costantini·Paolo Esposito
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Abstract

A bright burst, followed by an X-ray tail lasting ~10 ks, was detected during an XMM-Newton observation of the magnetar 1E 1547.0-5408 carried out on 2009 February 3. The burst, also observed by SWIFT/BAT, had a spectrum well fit by the sum of two blackbodies with temperatures of ~4 keV and 10 keV and a fluence in the 0.3-150 keV energy range of ~1e-5 erg/cm2. The X-ray tail had a fluence of ~4e-8 erg/cm2. Thanks to the knowledge of the distances and relative optical depths of three dust clouds between us and 1E 1547.0-5408, we show that most of the X-rays in the tail can be explained by dust scattering of the burst emission, except for the first ~20-30 s. We point out that other X-ray tails observed after strong magnetar bursts may contain a non-negligible contribution due to dust scattering.

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Fabio Pintore, Sandro Mereghetti, Andrea Tiengo, Giacomo Vianello, Elisa Costantini, Paolo Esposito. 2017-02-07. The effect of X-ray dust-scattering on a bright burst from the magnetar 1E 1547.0-5408. https://doi.org/10.1093/mnras/stx368

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