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Title:
Pulsed Thermal Emission from the Accreting Pulsar XMMU J054134.7-682550
Authors:
Manousakis, Antonis; Walter, Roland; Audard, Marc; Lanz, Thierry
Affiliation:
AA(ISDC Data Center for Astrophysics and Observatoire de Genève, Université de Genève, Switzerland), AB(ISDC Data Center for Astrophysics and Observatoire de Genève, Université de Genève, Switzerland), AC(ISDC Data Center for Astrophysics and Observatoire de Genève, Université de Genève, Switzerland), AD(Department of Astronomy, University of Maryland College Park, USA)
Publication:
SIMBOL-X: FOCUSING ON THE HARD X-RAY UNIVERSE: Proceedings of the 2nd International Simbol-X Symposium. AIP Conference Proceedings, Volume 1126, pp. 325-327 (2009). (AIPC Homepage)
Publication Date:
05/2009
Origin:
AIP
PACS Keywords:
X-ray sources; X-ray bursts, Infall, accretion, and accretion disks, Neutron stars, X-ray
DOI:
10.1063/1.3149445
Bibliographic Code:
2009AIPC.1126..325M

Abstract

XMMU J054134.7-682550, located in the LMC, featured a type II outburst in August 2007. We analyzed XMM-Newton (EPIC-MOS) and RXTE (PCA) data in order to derive the spectral and temporal characteristics of the system throughout the outburst. Spectral variability, spin period evolution, energy dependent pulse shape are discussed. The outburst (LX~3×1038 erg/s~LEDD) spectrum can be modeled using, cutoff power law, soft X-ray blackbody, disk emission, and cyclotron absorption line. The blackbody component shows a sinusoidal behavior, expected from hard X-ray reprocessing on the inner edge of the accretion disk. The thickness of the inner accretion disk (width of ~75 km) can be constrained. The spin-up of the pulsar during the outburst is the signature of a (huge) accretion rate. Simbol-X will provide similar capabilities as XMM-Newton and RXTE together, for such bright events.
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