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Swift-XRT spectra of GRB 090902B

Last updated after receiving ObsID 00020111017, version 11

Data were analysed using HEASOFT version 6.32

About these products.

Get another burst.

Add time-sliced spectrum.

The spectral fits assume a redshift: 1.822 (GCN 9873)

Time-averaged spectrum (T0 + 45099 to 81104 s)

Download spectral files for Time-averaged spectrum.

Plots to download

PC mode spectrum of Time-averaged

PC mode. Mean photon arrival: T0+63005 s

N_H (Galactic)	4.53 × 10²⁰ cm^-2
N_H (intrinsic)	2.3 (+0.8, -0.6) × 10²² cm^-2
z of absorber	1.822
Photon index	1.74 (+0.14, -0.13)
Flux (0.3-10 keV) (Observed)	3.27 (+0.31, -0.28) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.13 (+0.29, -0.28) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	4.10 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.18 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	317.25 (356)
Spectrum exposure	13.5 ks