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Swift-XRT spectra of GRB 070724A

Last updated after receiving ObsID 00285948007, version 16

Data were analysed using HEASOFT version 6.32

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Add time-sliced spectrum.

The spectral fits assume a redshift: 0.457 (GCN 6665)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 73 to 52810 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+98 s

N_H (Galactic)	1.21 × 10²⁰ cm^-2
N_H (intrinsic)	5.8 (+2.0, -1.7) × 10²¹ cm^-2
z of absorber	0.457
Photon index	1.50 (+0.16, -0.15)
Flux (0.3-10 keV) (Observed)	7.3 (+0.8, -0.7) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	8.7 (+0.7, -0.7) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	4.78 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.69 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	291.79 (351)
Spectrum exposure	57 s

PC mode. Mean photon arrival: T0+12749 s

N_H (Galactic)	1.21 × 10²⁰ cm^-2
N_H (intrinsic)	1.5 (+2.6, -1.5) × 10²¹ cm^-2
z of absorber	0.457
Photon index	1.40 (+0.31, -0.29)
Flux (0.3-10 keV) (Observed)	7.6 (+1.9, -1.5) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	8.2 (+1.6, -1.3) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	4.76 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.09 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	124.34 (124)
Spectrum exposure	23.1 ks

Late Time spectrum (T0 + 4099 to 52810 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+25069 s

N_H (Galactic)	1.21 × 10²⁰ cm^-2
N_H (intrinsic)	5 (+33, -5) × 10²⁰ cm^-2
z of absorber	0.457
Photon index	1.5 (+0.5, -0.3)
Flux (0.3-10 keV) (Observed)	2.3 (+0.8, -0.6) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.4 (+0.7, -0.5) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	4.28 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.46 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	76.38 (66)
Spectrum exposure	22.3 ks