Unraveling the cooling trend of the soft gamma repeater SGR 1627-41

C. Kouveliotou; D. Eichler; P. M. Woods; Y. Lyubarsky; S. K. Patel; E. Göǧüş; M. Van der Klis; A. Tennant; S. Wachter; K. Hurley

doi:10.1086/379187

Unraveling the cooling trend of the soft gamma repeater SGR 1627-41

C. Kouveliotou, D. Eichler, P. M. Woods, Y. Lyubarsky, S. K. Patel, E. Göǧüş, M. Van der Klis, A. Tennant, S. Wachter, K. Hurley

Department of Physics

Research output: Contribution to journal › Article › peer-review

52 Scopus citations

Abstract

SGR 1627-41 was discovered in 1998 after a single active episode that lasted ∼6 weeks. We report here our monitoring results of the decay trend of the persistent X-ray luminosity of the source during the last 5 years. We find an initial temporal power-law decay with index 0.47, reaching a plateau that is followed by a sharp (factor of 10) flux decline ∼800 days after the source activation. The source spectrum is best described during the entire period by a single power law with high absorption [N_H = 9.0(7) × 10²² cm^-2]; the spectral index, however, varies dramatically between 2.2 and 3.8 spanning the entire range for all known soft gamma repeater sources. We discuss the cooling behavior of the neutron star assuming a deep crustal heating initiated by the burst activity of the source during 1998.

Original language	English
Pages (from-to)	L79-L82
Journal	Astrophysical Journal
Volume	596
Issue number	1 II
DOIs	https://doi.org/10.1086/379187
State	Published - 10 Oct 2003

Keywords

Stars: neutron

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/379187

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@article{4b53039b1ae04bf198b19a4293fb8b3b,

title = "Unraveling the cooling trend of the soft gamma repeater SGR 1627-41",

abstract = "SGR 1627-41 was discovered in 1998 after a single active episode that lasted ∼6 weeks. We report here our monitoring results of the decay trend of the persistent X-ray luminosity of the source during the last 5 years. We find an initial temporal power-law decay with index 0.47, reaching a plateau that is followed by a sharp (factor of 10) flux decline ∼800 days after the source activation. The source spectrum is best described during the entire period by a single power law with high absorption [NH = 9.0(7) × 1022 cm-2]; the spectral index, however, varies dramatically between 2.2 and 3.8 spanning the entire range for all known soft gamma repeater sources. We discuss the cooling behavior of the neutron star assuming a deep crustal heating initiated by the burst activity of the source during 1998.",

keywords = "Stars: neutron",

author = "C. Kouveliotou and D. Eichler and Woods, {P. M.} and Y. Lyubarsky and Patel, {S. K.} and E. G{\"o}ǧ{\"u}{\c s} and {Van der Klis}, M. and A. Tennant and S. Wachter and K. Hurley",

note = "Funding Information: We would like to thank the anonymous referee for an extremely rapid and insightful report and M. H. Finger for many useful comments. C. K., P. M. W., and E. G. acknowledge support from NASA grant NAG5-9350 and SAO grant GO1-2066X. D. E. and Y. L. gratefully acknowledge support from the Arnow Chair of Physics, the Israel Basic Research Foundation, and the Israel-US Binational Science Foundation.",

year = "2003",

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doi = "10.1086/379187",

language = "English",

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T1 - Unraveling the cooling trend of the soft gamma repeater SGR 1627-41

AU - Kouveliotou, C.

AU - Eichler, D.

AU - Woods, P. M.

AU - Lyubarsky, Y.

AU - Patel, S. K.

AU - Göǧüş, E.

AU - Van der Klis, M.

AU - Tennant, A.

AU - Wachter, S.

AU - Hurley, K.

N1 - Funding Information: We would like to thank the anonymous referee for an extremely rapid and insightful report and M. H. Finger for many useful comments. C. K., P. M. W., and E. G. acknowledge support from NASA grant NAG5-9350 and SAO grant GO1-2066X. D. E. and Y. L. gratefully acknowledge support from the Arnow Chair of Physics, the Israel Basic Research Foundation, and the Israel-US Binational Science Foundation.

PY - 2003/10/10

Y1 - 2003/10/10

N2 - SGR 1627-41 was discovered in 1998 after a single active episode that lasted ∼6 weeks. We report here our monitoring results of the decay trend of the persistent X-ray luminosity of the source during the last 5 years. We find an initial temporal power-law decay with index 0.47, reaching a plateau that is followed by a sharp (factor of 10) flux decline ∼800 days after the source activation. The source spectrum is best described during the entire period by a single power law with high absorption [NH = 9.0(7) × 1022 cm-2]; the spectral index, however, varies dramatically between 2.2 and 3.8 spanning the entire range for all known soft gamma repeater sources. We discuss the cooling behavior of the neutron star assuming a deep crustal heating initiated by the burst activity of the source during 1998.

AB - SGR 1627-41 was discovered in 1998 after a single active episode that lasted ∼6 weeks. We report here our monitoring results of the decay trend of the persistent X-ray luminosity of the source during the last 5 years. We find an initial temporal power-law decay with index 0.47, reaching a plateau that is followed by a sharp (factor of 10) flux decline ∼800 days after the source activation. The source spectrum is best described during the entire period by a single power law with high absorption [NH = 9.0(7) × 1022 cm-2]; the spectral index, however, varies dramatically between 2.2 and 3.8 spanning the entire range for all known soft gamma repeater sources. We discuss the cooling behavior of the neutron star assuming a deep crustal heating initiated by the burst activity of the source during 1998.

KW - Stars: neutron

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DO - 10.1086/379187

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SP - L79-L82

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 II

ER -

Unraveling the cooling trend of the soft gamma repeater SGR 1627-41

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