SGR burst detected by KW on 1999-01-04
at T0 = 6625.592 s UT (01:50:25.592)

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)
-0.114 0.014 0.128 0.084-0.022+0.022 0.020-0.004+0.004

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 0.56-0.11+0.11 1.47-0.34+0.35 ... 2.74-1.08+1.05 104.08-49.59+5503.27 12.87-2.34+3.39 1.67-0.81+17.41 5.94/5