Skip banner and navigation tools.

 |  site map

Swift-XRT spectra of GRB 090812

Last updated after receiving ObsID 00359711004, version 13

Data were analysed using HEASOFT version 6.32

About these products.

Get another burst.

Add time-sliced spectrum.

The spectral fits assume a redshift: 2.452 (GCN 9771)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 83 to 60325 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+230 s

NH (Galactic)2.47 × 1020 cm-2
NH (intrinsic)1.08 (+0.12, -0.12) × 1022 cm-2
z of absorber2.452
Photon index1.884 (+0.028, -0.028)
Flux (0.3-10 keV)
(Observed)
1.079 (+0.020, -0.019) × 10-9 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.258 (+0.019, -0.019) × 10-9 erg cm-2 s-1
Counts to flux (obs)3.43 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.00 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
713.03 (716)
Spectrum exposure626 s

PC mode. Mean photon arrival: T0+12475 s

NH (Galactic)2.47 × 1020 cm-2
NH (intrinsic)10 (+6, -6) × 1021 cm-2
z of absorber2.452
Photon index1.80 (+0.14, -0.14)
Flux (0.3-10 keV)
(Observed)
6.5 (+0.7, -0.6) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
7.4 (+0.6, -0.5) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.65 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.16 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
280.94 (305)
Spectrum exposure8.2 ks

[Back to top]

Late Time spectrum (T0 + 11893 to 60325 s)

Download spectral files for Late Time spectrum.

Plots to download

PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+31488 s

NH (Galactic)2.47 × 1020 cm-2
NH (intrinsic)1.8 (+1.2, -1.0) × 1022 cm-2
z of absorber2.452
Photon index2.02 (+0.25, -0.23)
Flux (0.3-10 keV)
(Observed)
1.58 (+0.26, -0.22) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.00 (+0.26, -0.23) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.31 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.19 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
147.18 (168)
Spectrum exposure7.7 ks

[Back to top]