2005A&A...440L..63T


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET02:56:57

2005A&A...440L..63T - Astronomy and Astrophysics, volume 440, L63-66 (2005/9-4)

The calm after the storm: XMM-Newton observation of SGR 1806-20 two months after the Giant Flare of 2004 December 27.

TIENGO A., ESPOSITO P., MEREGHETTI S., REA N., STELLA L., ISRAEL G.L., TUROLLA R. and ZANE S.

Abstract (from CDS):

XMM-Newton observed the soft gamma repeater SGR 1806-20 about two months after its 2004 December 27 giant flare. A comparison with the previous observations taken with the same instrument in 2003-2004 shows that the pulsed fraction and the spin-down rate have significantly decreased and that the spectrum slightly softened. These changes may indicate a global reconfiguration of the neutron star magnetosphere. The spectral analysis confirms that the presence of a blackbody component in addition to the power-law is required. Since this additional component is consistent with being constant with respect to the earlier observations, we explore the possibility of describing the long-term spectral evolution as only due to the power-law variations. In this case, the slope of the power-law does not significantly change and the spectral softening following the giant flare is caused by the increase of the relative contribution of the blackbody over the power-law component.

Abstract Copyright:

Journal keyword(s): stars: individual: SGR 1806-20 - X-rays: stars

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 PSR B0525-66 Psr 05 26 00.7 -66 04 35           ~ 522 1
2 PSR J1808-2024 Psr 18 08 39.32 -20 24 40.1           ~ 1133 2
3 GBS 1900+14 gB 19 07 13 +09 19.6           ~ 799 0
4 2E 4673 HXB 23 01 08.14 +58 52 44.5           ~ 596 1

    Equat.    Gal    SGal    Ecl

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2021.02.26-02:56:57

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