Temporal and spectral evolution in X- and gamma-rays of magnetar 1E 1547.0-5408 since its October 2008 outburst: the discovery of a transient hard pulsed component after its January 2009 outburst

TL;DR

This study details the evolution of X-ray and gamma-ray emissions from magnetar 1E 1547.0-5408 following its 2008 and 2009 outbursts, revealing a transient hard pulsed component after the January 2009 event.

Contribution

It provides a comprehensive analysis of the temporal and spectral evolution of the magnetar's emissions over two years, highlighting the discovery of a transient hard pulsed component.

Findings

Detection of a transient hard pulsed component after January 2009 outburst

Detailed evolution of spectral and temporal properties from 1 to 300 keV

Extended monitoring over two years with multiple space telescopes

Abstract

The magnetar 1E 1547.0-5408 exhibited outbursts in October 2008 and January 2009. In this paper we present in great detail the evolution of the temporal and spectral characteristics of the persistent total and pulsed emission of 1E 1547.0-5408 between ~1 and 300 keV starting in October 3, 2008, and ending in January 2011. We analyzed data collected with the Rossi X-ray Timing Explorer, the International Gamma-Ray Astrophysics Laboratory and the Swift satellite.