SGR burst detected by KW on 2004-12-25
at T0 = 72222.543 s UT (20:03:42.543)

Lightcurve
Lightcurve

Source properties

Name:  SGR 1806-20
Coordinates[J2000]: (272.1639, -20.4111)
Proposed associations: W31,  MC 13A,  massive star cluster
Distance:  8.7 kpc
P, Ṗ:   ∼ 7.55 s,  ∼ 49.5 × 10-11 s s-1
B surf:  ∼ 20.0 × 1014 G
Characteristic age:  ∼ 0.2 kyr

Temporal analysis

Ti (s) Tf (s) T100 (s) T90 (s) T50 (s)
-0.128 0.334 0.462 0.326-0.013+0.013 0.138-0.018+0.018

Spectral analysis

Model Spectra Fluence Peak flux α Ep kT1 R1 kT2 R2 χ2/dof
(10-6 erg/cm2) (10-5 erg/cm2/s) (keV) (keV) (km) (keV) (km)
2BB 1 - 4 4.61-0.12+0.12 4.40-0.24+0.24 ... 4.23-0.44+0.49 68.33-15.52+31.54 12.91-0.65+0.72 4.74-0.92+1.35 25.85/21