Skip banner and navigation tools.

 |  site map

Swift-XRT spectra of GRB 250818B

Last updated after receiving ObsID 03000030001, version 5

Data were analysed using HEASOFT version 6.35.2

About these products.

Get another burst.

Add time-sliced spectrum.

The spectral fits assume a redshift: 1.216 (GCN 41419)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 1683 to 6571 s)

Download spectral files for Time-averaged spectrum.

Plots to download

PC mode spectrum of Time-averaged

PC mode. Mean photon arrival: T0+3514 s

NH (Galactic)6.49 × 1020 cm-2
NH (intrinsic)2.4 (+2.8, -2.4) × 1021 cm-2
z of absorber1.216
Photon index1.84 (+0.18, -0.17)
Flux (0.3-10 keV)
(Observed)
1.78 (+0.22, -0.19) × 10-11 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.11 (+0.20, -0.19) × 10-11 erg cm-2 s-1
Counts to flux (obs)3.67 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.35 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
237.09 (247)
Spectrum exposure1.6 ks

[Back to top]

Late Time spectrum (T0 + 5734 to 6571 s)

Download spectral files for Late Time spectrum.

Plots to download

PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+6145 s

NH (Galactic)6.49 × 1020 cm-2
NH (intrinsic)2.1 (+4.7, -2.1) × 1021 cm-2
z of absorber1.216
Photon index2.00 (+0.32, -0.29)
Flux (0.3-10 keV)
(Observed)
1.12 (+0.24, -0.19) × 10-11 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.37 (+0.23, -0.20) × 10-11 erg cm-2 s-1
Counts to flux (obs)3.36 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.13 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
108.13 (120)
Spectrum exposure837 s

[Back to top]