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Title:
Quiescent state and outburst evolution of SGR 0501+4516
Authors:
Camero, A.; Papitto, A.; Rea, N.; Viganò, D.; Pons, J. A.; Tiengo, A.; Mereghetti, S.; Turolla, R.; Esposito, P.; Zane, S.; Israel, G. L.; Götz, D.
Affiliation:
AA(Institut de Ciències de l'Espai (IEEC-CSIC), Campus UAB, Fac. de Ciències, Torre C5, parell, 2a planta, E-08193 Barcelona, Spain; ), AB(Institut de Ciències de l'Espai (IEEC-CSIC), Campus UAB, Fac. de Ciències, Torre C5, parell, 2a planta, E-08193 Barcelona, Spain), AC(Institut de Ciències de l'Espai (IEEC-CSIC), Campus UAB, Fac. de Ciències, Torre C5, parell, 2a planta, E-08193 Barcelona, Spain; Astronomical Institute `Anton Pannekoek', University of Amsterdam, Science Park 904, Postbus 94249, NL-1090 GE Amsterdam, the Netherlands), AD(Institut de Ciències de l'Espai (IEEC-CSIC), Campus UAB, Fac. de Ciències, Torre C5, parell, 2a planta, E-08193 Barcelona, Spain; Departament de Física Aplicada, Universitat d'Alacant, Ap. Correus 99, E-03080 Alacant, Spain), AE(Departament de Física Aplicada, Universitat d'Alacant, Ap. Correus 99, E-03080 Alacant, Spain), AF(INFN - Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, via A. Bassi 6, I-27100 Pavia, Italy; IUSS - Istituto Universitario di Studi Superiori, piazza della Vittoria 15, I-27100 Pavia, Italy; INAF - Istituto di Astrofisica Spaziale e Fisica Cosmica, via E. Bassini 15, I-20133 Mlano, Italy), AG(INAF - Istituto di Astrofisica Spaziale e Fisica Cosmica, via E. Bassini 15, I-20133 Mlano, Italy), AH(Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT, UK; Dipartimento di Fisica, Università di Padova, via Marzolo 8, I-35131 Padova, Italy), AI(INFN - Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, via A. Bassi 6, I-27100 Pavia, Italy; INAF - Istituto di Astrofisica Spaziale e Fisica Cosmica, via E. Bassini 15, I-20133 Mlano, Italy), AJ(Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT, UK), AK(INAF - Osservatorio Astronomico di Roma, via Frascati 33, I-00040 Monte Porzio Catone (RM), Italy), AL(AIM (UMR 7158 CEA/DSM-CNRS-Université Paris Diderot) Irfu/Service d'Astrophysique, Saclay, F-91191 Gif-sur-Yvette Cedex, France)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 438, Issue 4, p.3291-3298 (MNRAS Homepage)
Publication Date:
03/2014
Origin:
OUP
Astronomy Keywords:
pulsars: general, pulsars: individual: SGR 0501+4516, X-rays: general
Abstract Copyright:
2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
DOI:
10.1093/mnras/stt2432
Bibliographic Code:
2014MNRAS.438.3291C

Abstract

We report on the quiescent state of the soft gamma repeater SGR 0501+4516 observed by XMM-Newton on 2009 August 30. The source exhibits an absorbed flux ˜75 times lower than that measured at the peak of the 2008 outburst, and a rather soft spectrum, with the same value of the blackbody temperature observed with ROSAT back in 1992. This new observation is put into the context of all existing X-ray data since its discovery in 2008 August, allowing us to complete the study of the timing and spectral evolution of the source from outburst until its quiescent state. The set of deep XMM-Newton observations performed during the few years time-scale of its outburst allows us to monitor the spectral characteristics of this magnetar as a function of its rotational period, and their evolution along these years. After the first ˜10 d, the initially hot and bright surface spot progressively cooled down during the decay. We discuss the behaviour of this magnetar in the context of its simulated secular evolution, inferring a plausible dipolar field at birth of 3 × 1014 G, and a current (magnetothermal) age of ˜10 kyr.
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