Skip banner and navigation tools.

 |  site map

Swift-XRT spectra of GRB 170921A

Last updated after receiving ObsID 00773509002, version 5

Data were analysed using HEASOFT version 6.32

About these products.

Get another burst.

Add time-sliced spectrum.

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 104 to 81793 s)

Download spectral files for Time-averaged spectrum.

Plots to download

PC mode spectrum of Time-averaged

PC mode. Mean photon arrival: T0+5304 s

NH (Galactic)5.49 × 1020 cm-2
NH (intrinsic)10.0 (+2.8, -2.4) × 1021 cm-2
z of absorber0
Photon index2.7 (+0.4, -0.4)
Flux (0.3-10 keV)
(Observed)
1.12 (+0.18, -0.15) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
4.34 (+2.70, -0.68) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.42 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)1.33 × 10-10 erg cm-2 ct-1
W-stat (dof)
What's this?
165.81 (185)
Spectrum exposure14.0 ks

[Back to top]

Late Time spectrum (T0 + 4770 to 81793 s)

Download spectral files for Late Time spectrum.

Plots to download

PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+17367 s

NH (Galactic)5.49 × 1020 cm-2
NH (intrinsic)7 (+4, -3) × 1021 cm-2
z of absorber0
Photon index2.8 (+0.8, -0.7)
Flux (0.3-10 keV)
(Observed)
2.8 (+0.9, -0.7) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
9.6 (+16.1, -2.6) × 10-13 erg cm-2 s-1
Counts to flux (obs)3.06 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)1.06 × 10-10 erg cm-2 ct-1
W-stat (dof)
What's this?
68.92 (66)
Spectrum exposure12.6 ks

[Back to top]