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Swift-XRT spectra of GRB 070521

Last updated after receiving ObsID 00279935006, version 14

Data were analysed using HEASOFT version 6.35.2

About these products.

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Add time-sliced spectrum.

The spectral fits assume a redshift: 2.0865 (Kruhler et al. 2015)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 80 to 24602 s)

Download spectral files for Time-averaged spectrum.

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+93 s

N_H (Galactic)	3.24 × 10²⁰ cm^-2
N_H (intrinsic)	1.6 (+5.6, -1.3) × 10²³ cm^-2
z of absorber	2.0865
Photon index	1.98 (+1.73, -0.77)
Flux (0.3-10 keV) (Observed)	1.9 (+0.9, -0.7) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.4 (+10.5, -1.3) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	3.25 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.96 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	66.94 (61)
Spectrum exposure	23 s

PC mode. Mean photon arrival: T0+9392 s

N_H (Galactic)	3.24 × 10²⁰ cm^-2
N_H (intrinsic)	1.51 (+0.22, -0.21) × 10²³ cm^-2
z of absorber	2.0865
Photon index	1.85 (+0.12, -0.12)
Flux (0.3-10 keV) (Observed)	1.39 (+0.09, -0.08) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.30 (+0.19, -0.16) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4.90 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	8.09 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	434.04 (492)
Spectrum exposure	10.3 ks

Late Time spectrum (T0 + 4686 to 24602 s)

Download spectral files for Late Time spectrum.

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+11350 s

N_H (Galactic)	3.24 × 10²⁰ cm^-2
N_H (intrinsic)	1.53 (+0.24, -0.22) × 10²³ cm^-2
z of absorber	2.0865
Photon index	1.89 (+0.13, -0.13)
Flux (0.3-10 keV) (Observed)	1.04 (+0.07, -0.07) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.76 (+0.17, -0.14) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4.80 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	8.15 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	419.02 (459)
Spectrum exposure	9.8 ks