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Article: Chandra and rxte observations of 1E 1547.0-5408: Comparing the 2008 and 2009 outbursts

TitleChandra and rxte observations of 1E 1547.0-5408: Comparing the 2008 and 2009 outbursts
Authors
KeywordsPulsars: Individual (1E 1547.0?5408, Psr J1550?5418, Sgr J1550?5418)
Stars: Neutron
X-Rays: Bursts
Issue Date2011
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/0004-637X
Citation
Astrophysical Journal, 2011, v. 729 n. 2, article no. 131 How to Cite?
AbstractWe present results from Chandra X-ray Observatory and Rossi X-ray Timing Explorer (RXTE) observations of the magnetar 1E 1547.0-5408 (SGR J1550-5418) following the source's outbursts in 2008 October and 2009 January. During the time span of the Chandra observations, which covers days 4 through 23 and days 2 through 16 after the 2008 and 2009 events, respectively, the source spectral shape remained stable in the Chandra band, while the pulsar's spin-down rate in the same span in 2008 increased by a factor of 2.2 as measured by RXTE. This suggests decoupling between the source's spin-down and radiative changes, hence between the spin-down-inferred magnetic field strength and that inferred spectrally. The lack of spectral variation during flux decay is surprising for models of magnetar outbursts. We also found a strong anti-correlation between the phase-averaged flux and the pulsed fraction in the 2008 and 2009 Chandra data, but not in the pre-2008 measurements. We discuss these results in the context of the magnetar model. © 2011. The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/180496
ISSN
2015 Impact Factor: 5.909
2015 SCImago Journal Rankings: 3.266
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorNg, CYen_US
dc.contributor.authorKaspi, VMen_US
dc.contributor.authorDib, Ren_US
dc.contributor.authorOlausen, SAen_US
dc.contributor.authorScholz, Pen_US
dc.contributor.authorGüver, Ten_US
dc.contributor.authorZel, Fen_US
dc.contributor.authorGavriil, FPen_US
dc.contributor.authorWoods, PMen_US
dc.date.accessioned2013-01-28T01:38:50Z-
dc.date.available2013-01-28T01:38:50Z-
dc.date.issued2011en_US
dc.identifier.citationAstrophysical Journal, 2011, v. 729 n. 2, article no. 131en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/180496-
dc.description.abstractWe present results from Chandra X-ray Observatory and Rossi X-ray Timing Explorer (RXTE) observations of the magnetar 1E 1547.0-5408 (SGR J1550-5418) following the source's outbursts in 2008 October and 2009 January. During the time span of the Chandra observations, which covers days 4 through 23 and days 2 through 16 after the 2008 and 2009 events, respectively, the source spectral shape remained stable in the Chandra band, while the pulsar's spin-down rate in the same span in 2008 increased by a factor of 2.2 as measured by RXTE. This suggests decoupling between the source's spin-down and radiative changes, hence between the spin-down-inferred magnetic field strength and that inferred spectrally. The lack of spectral variation during flux decay is surprising for models of magnetar outbursts. We also found a strong anti-correlation between the phase-averaged flux and the pulsed fraction in the 2008 and 2009 Chandra data, but not in the pre-2008 measurements. We discuss these results in the context of the magnetar model. © 2011. The American Astronomical Society. All rights reserved.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/0004-637Xen_US
dc.relation.ispartofAstrophysical Journalen_US
dc.subjectPulsars: Individual (1E 1547.0?5408, Psr J1550?5418, Sgr J1550?5418)en_US
dc.subjectStars: Neutronen_US
dc.subjectX-Rays: Burstsen_US
dc.titleChandra and rxte observations of 1E 1547.0-5408: Comparing the 2008 and 2009 outburstsen_US
dc.typeArticleen_US
dc.identifier.emailNg, CY: stephen_ng@hku.hken_US
dc.identifier.authorityNg, CY=rp01706en_US
dc.description.naturelink_to_OA_fulltexten_US
dc.identifier.doi10.1088/0004-637X/729/2/131en_US
dc.identifier.scopuseid_2-s2.0-79952136132en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79952136132&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume729en_US
dc.identifier.issue2en_US
dc.identifier.isiWOS:000288608700054-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridNg, CY=24830903500en_US
dc.identifier.scopusauthoridKaspi, VM=7006755510en_US
dc.identifier.scopusauthoridDib, R=8609966700en_US
dc.identifier.scopusauthoridOlausen, SA=36669077400en_US
dc.identifier.scopusauthoridScholz, P=44561412500en_US
dc.identifier.scopusauthoridGüver, T=9247225700en_US
dc.identifier.scopusauthoridZel, F=35178895800en_US
dc.identifier.scopusauthoridGavriil, FP=6602456240en_US
dc.identifier.scopusauthoridWoods, PM=35560112800en_US
dc.customcontrol.immutablejt 130808-

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