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Swift-XRT spectra of GRB 070721A

Last updated after receiving ObsID 00285653008, version 17

Data were analysed using HEASOFT version 6.32

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Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 87 to 53467 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+101 s

NH (Galactic)1.68 × 1020 cm-2
NH (intrinsic)1.15 (+1.34, -0.96) × 1021 cm-2
z of absorber0
Photon index3.7 (+1.0, -0.8)
Flux (0.3-10 keV)
(Observed)
1.05 (+0.24, -0.19) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.7 (+4.8, -0.8) × 10-10 erg cm-2 s-1
Counts to flux (obs)2.04 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)5.31 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
78.87 (75)
Spectrum exposure35 s

PC mode. Mean photon arrival: T0+10776 s

NH (Galactic)1.68 × 1020 cm-2
NH (intrinsic)7 (+7, -6) × 1020 cm-2
z of absorber0
Photon index2.4 (+0.4, -0.3)
Flux (0.3-10 keV)
(Observed)
6.47 (+1.12, -0.94) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
8.8 (+1.4, -1.1) × 10-13 erg cm-2 s-1
Counts to flux (obs)2.75 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.72 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
137.62 (150)
Spectrum exposure17.3 ks

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Late Time spectrum (T0 + 17664 to 53467 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+33033 s

NH (Galactic)1.68 × 1020 cm-2
NH (intrinsic)1.8 (+2.2, -1.5) × 1021 cm-2
z of absorber0
Photon index2.7 (+0.8, -0.6)
Flux (0.3-10 keV)
(Observed)
1.8 (+0.6, -0.4) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
3.5 (+4.0, -0.8) × 10-13 erg cm-2 s-1
Counts to flux (obs)2.55 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.86 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
57.60 (62)
Spectrum exposure15.5 ks

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