Skip banner and navigation tools.

 |  site map

Swift-XRT spectra of GRB 180904A

Last updated after receiving ObsID 00859282991, version 0

Data were analysed using HEASOFT version 6.26.1

About these products.

Get another burst.

Add time-sliced spectrum.

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 129 to 51871 s)

Download spectral files for Time-averaged spectrum.

Plots to download

WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+164 s

NH (Galactic)3.37 × 1020 cm-2
NH (intrinsic)4.6 (+0.9, -0.8) × 1021 cm-2
z of absorber0
Photon index2.65 (+0.24, -0.22)
Flux (0.3-10 keV)
(Observed)
2.51 (+0.26, -0.24) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
6.64 (+1.67, -0.38) × 10-10 erg cm-2 s-1
Counts to flux (obs)2.87 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)7.60 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
248.18 (298)
Spectrum exposure91 s

PC mode. Mean photon arrival: T0+2289 s

NH (Galactic)3.37 × 1020 cm-2
NH (intrinsic)3.9 (+1.3, -1.1) × 1021 cm-2
z of absorber0
Photon index2.23 (+0.28, -0.26)
Flux (0.3-10 keV)
(Observed)
3.0 (+0.4, -0.4) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
5.4 (+0.9, -0.7) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.51 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)6.38 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
178.32 (219)
Spectrum exposure8.4 ks

[Back to top]

Late Time spectrum (T0 + 4000 to 51871 s)

Download spectral files for Late Time spectrum.

Plots to download

PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+15740 s

NH (Galactic)3.37 × 1020 cm-2
NH (intrinsic)6 (+5, -4) × 1021 cm-2
z of absorber0
Photon index3.02 (+1.21, -0.95)
Flux (0.3-10 keV)
(Observed)
1.9 (+1.0, -0.6) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
8.3 (+40.2, -2.0) × 10-13 erg cm-2 s-1
Counts to flux (obs)2.74 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)1.18 × 10-10 erg cm-2 ct-1
W-stat (dof)
What's this?
25.40 (35)
Spectrum exposure7.9 ks

[Back to top]