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Swift-XRT spectra of GRB 210820A

Last updated after receiving ObsID 01069551005, version 3

Data were analysed using HEASOFT version 6.29

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Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 131 to 18217 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+268 s

NH (Galactic)3.59 × 1020 cm-2
NH (intrinsic)8.9 (+1.1, -1.1) × 1020 cm-2
z of absorber0
Photon index1.76 (+0.04, -0.03)
Flux (0.3-10 keV)
(Observed)
1.75 (+0.04, -0.04) × 10-9 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.07 (+0.04, -0.04) × 10-9 erg cm-2 s-1
Counts to flux (obs)3.77 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.48 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
740.44 (740)
Spectrum exposure339 s

PC mode. Mean photon arrival: T0+2565 s

NH (Galactic)3.59 × 1020 cm-2
NH (intrinsic)0 (+3.97 × 1020, -0) cm-2
z of absorber0
Photon index2.26 (+0.26, -0.12)
Flux (0.3-10 keV)
(Observed)
3.1 (+0.3, -0.4) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
3.6 (+0.4, -0.4) × 10-12 erg cm-2 s-1
Counts to flux (obs)2.87 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.26 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
160.88 (175)
Spectrum exposure6.2 ks

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Late Time spectrum (T0 + 5919 to 18217 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+8745 s

NH (Galactic)3.59 × 1020 cm-2
NH (intrinsic)5.0 (+13.9, -5.0) × 1020 cm-2
z of absorber0
Photon index2.0 (+0.6, -0.4)
Flux (0.3-10 keV)
(Observed)
7.3 (+2.5, -1.8) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
8.8 (+2.3, -1.9) × 10-13 erg cm-2 s-1
Counts to flux (obs)3.25 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.93 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
98.33 (62)
Spectrum exposure4.8 ks

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