Long term hard X-ray variability of the anomalous X-ray pulsar 1RXS J170849.0-400910 discovered with INTEGRAL

Abstract

We report on a multi-band high-energy observing campaign aimed at studying the long term spectral variability of the Anomalous X-ray Pulsar (AXP) 1RXS J170849.0-400910, one of the magnetar candidates. We observed 1RXS J170849.0-400910 in Fall 2006 and Spring 2007 simultaneously with Swift/XRT, in the 0.1-10 keV energy range, and with INTEGRAL/IBIS, in the 20-200 keV energy range. Furthermore, we also reanalyzed, using the latest calibration and software, all the publicly available INTEGRAL data since 2002, and the soft X-ray data starting from 1999 taken using BeppoSAX, Chandra, XMM, and Swift/XRT, in order to study the soft and hard X-ray spectral variability of 1RXS J170849.0-400910. We find a long-term variability of the hard X-ray flux, extending the hardness-intensity correlation proposed for this source over 2 orders of magnitude in energy.

arXiv comment5 pages, 2 figures, accepted for publication in Astronomy & Astrophysics main journal

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Cited by in corpus (16)

• The McGill Magnetar Catalog
• The strongest cosmic magnets: Soft Gamma-ray Repeaters and Anomalous X-ray Pulsars
• Systematic study of magnetar outbursts
• The discovery, monitoring and environment of SGR J1935+2154
• Magnetar outbursts: an observational review
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• Magnetars: a short review and some sparse considerations
• A strong X-ray polarization signal from the magnetar 1RXS J170849.0-400910
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• The long-term enhanced brightness of the magnetar 1E 1547.0-5408
• On the X-ray variability of magnetar 1RXS J170849.0-400910
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• Long-Term Timing and Glitch Characteristics of Anomalous X-ray Pulsar 1RXS J170849.0-400910
• Fitting XMM-Newton Observations of the AXP 1RXS J170849.0-400910 with four magnetar surface emission models, and predictions for X-ray polarization observations with IXPE