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Swift-XRT spectra of GRB 120422A

Last updated after receiving ObsID 00520658027, version 5

Data were analysed using HEASOFT version 6.32

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Add time-sliced spectrum.

The spectral fits assume a redshift: 0.28 (GCN 13251)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 101 to 40849 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+119 s

N_H (Galactic)	4.25 × 10²⁰ cm^-2
N_H (intrinsic)	2.6 (+0.6, -0.5) × 10²¹ cm^-2
z of absorber	0.28
Photon index	4.12 (+0.27, -0.24)
Flux (0.3-10 keV) (Observed)	5.07 (+0.24, -0.23) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.2 (+0.7, -0.5) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	2.14 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	9.42 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	205.96 (210)
Spectrum exposure	71 s

PC mode. Mean photon arrival: T0+11155 s

N_H (Galactic)	4.25 × 10²⁰ cm^-2
N_H (intrinsic)	0 (+1.05 × 10²¹, -0) cm^-2
z of absorber	0.28
Photon index	2.19 (+0.44, -0.15)
Flux (0.3-10 keV) (Observed)	5.0 (+0.7, -0.9) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	5.5 (+1.0, -0.6) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	2.95 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.29 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	78.78 (115)
Spectrum exposure	14.6 ks

Late Time spectrum (T0 + 4635 to 40849 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+17628 s

N_H (Galactic)	4.25 × 10²⁰ cm^-2
N_H (intrinsic)	3.0 (+189.6, -3.0) × 10¹⁹ cm^-2
z of absorber	0.28
Photon index	1.90 (+0.46, -0.27)
Flux (0.3-10 keV) (Observed)	3.3 (+0.7, -0.8) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.7 (+0.9, -0.6) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	3.42 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.76 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	63.11 (83)
Spectrum exposure	13.5 ks