SIMBAD references

2005A&A...433L...9M - Astronomy and Astrophysics, volume 433, L9-12 (2005/4-2)

INTEGRAL discovery of persistent hard X-ray emission from the Soft Gamma-ray Repeater SGR 1806-20.


Abstract (from CDS):

We report the discovery of persistent hard X-ray emission extending up to 150 keV from the soft gamma-ray repeater SGR 1806-20 using data obtained with the INTEGRAL satellite in 2003-2004. Previous observations of hard X-rays from objects of this class were limited to short duration bursts and rare transient episodes of strongly enhanced luminosity (``flares''). The emission observed with the IBIS instrument above 20keV has a power law spectrum with photon index in the range 1.5-1.9 and a flux of 3 milliCrabs, corresponding to a 20-100keV luminosity of ∼1036erg/s (for a distance of 15kpc). The spectral hardness and the luminosity correlate with the level of source activity as measured from the number of emitted bursts.

Abstract Copyright:

Journal keyword(s): gamma rays: bursts - pulsars: general - stars: individual: SGR 1806-20

CDS comments: Large Magellanic Cloud supernova remnant N49 = LHA 120-N 49

Simbad objects: 9

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