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Swift-XRT spectra of GRB 120724A

Last updated after receiving ObsID 00528443000, version 17

Data were analysed using HEASOFT version 6.32

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Add time-sliced spectrum.

The spectral fits assume a redshift: 1.48 (GCN 13512)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 115 to 24553 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+132 s

N_H (Galactic)	5.20 × 10²⁰ cm^-2
N_H (intrinsic)	6 (+31, -6) × 10²⁰ cm^-2
z of absorber	1.48
Photon index	2.11 (+0.22, -0.17)
Flux (0.3-10 keV) (Observed)	3.1 (+0.4, -0.4) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.7 (+0.4, -0.3) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	2.92 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.44 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	167.07 (204)
Spectrum exposure	40 s

PC mode. Mean photon arrival: T0+5487 s

N_H (Galactic)	5.20 × 10²⁰ cm^-2
N_H (intrinsic)	0 (+1.93 × 10²¹, -0) cm^-2
z of absorber	1.48
Photon index	1.75 (+0.15, -0.13)
Flux (0.3-10 keV) (Observed)	1.91 (+0.22, -0.22) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.08 (+0.20, -0.20) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.70 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.05 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	174.71 (215)
Spectrum exposure	11.4 ks

Late Time spectrum (T0 + 4701 to 24553 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+14312 s

N_H (Galactic)	5.20 × 10²⁰ cm^-2
N_H (intrinsic)	3 (+9, -3) × 10²¹ cm^-2
z of absorber	1.48
Photon index	1.6 (+0.4, -0.3)
Flux (0.3-10 keV) (Observed)	7.6 (+2.1, -1.6) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	8.5 (+1.8, -1.5) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	4.20 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.68 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	79.59 (100)
Spectrum exposure	10.1 ks