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Swift-XRT spectra of GRB 180821A

Last updated after receiving ObsID 00854578009, version 6

Data were analysed using HEASOFT version 6.32

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Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 216 to 73989 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+292 s

NH (Galactic)2.11 × 1020 cm-2
NH (intrinsic)6.7 (+0.8, -0.8) × 1021 cm-2
z of absorber0
Photon index5.0 (+0.4, -0.4)
Flux (0.3-10 keV)
(Observed)
1.854 (+0.100, -0.096) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
6.9 (+13.0, -2.2) × 10-9 erg cm-2 s-1
Counts to flux (obs)1.90 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)7.08 × 10-10 erg cm-2 ct-1
W-stat (dof)
What's this?
222.57 (228)
Spectrum exposure171 s

PC mode. Mean photon arrival: T0+21122 s

NH (Galactic)2.11 × 1020 cm-2
NH (intrinsic)4.9 (+1.2, -1.1) × 1021 cm-2
z of absorber0
Photon index3.1 (+0.4, -0.3)
Flux (0.3-10 keV)
(Observed)
1.10 (+0.14, -0.12) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
4.52 (+2.23, -0.52) × 10-12 erg cm-2 s-1
Counts to flux (obs)2.53 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)1.04 × 10-10 erg cm-2 ct-1
W-stat (dof)
What's this?
133.48 (182)
Spectrum exposure13.2 ks

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Late Time spectrum (T0 + 4000 to 73989 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+27337 s

NH (Galactic)2.11 × 1020 cm-2
NH (intrinsic)6.3 (+1.8, -1.5) × 1021 cm-2
z of absorber0
Photon index3.0 (+0.4, -0.4)
Flux (0.3-10 keV)
(Observed)
8.0 (+1.2, -1.0) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
3.46 (+2.18, -0.66) × 10-12 erg cm-2 s-1
Counts to flux (obs)2.70 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)1.16 × 10-10 erg cm-2 ct-1
W-stat (dof)
What's this?
116.01 (160)
Spectrum exposure12.8 ks

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