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Swift-XRT spectra of GRB 151021A

Last updated after receiving ObsID 00660671008, version 13

Data were analysed using HEASOFT version 6.32

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Add time-sliced spectrum.

The spectral fits assume a redshift: 2.33 (GCN 18426)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 94 to 39505 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+148 s

N_H (Galactic)	1.13 × 10²⁰ cm^-2
N_H (intrinsic)	1.72 (+0.19, -0.19) × 10²² cm^-2
z of absorber	2.33
Photon index	1.68 (+0.04, -0.04)
Flux (0.3-10 keV) (Observed)	4.53 (+0.12, -0.11) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	5.20 (+0.11, -0.10) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	3.91 × 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?	738.36 (727)
Spectrum exposure	165 s

PC mode. Mean photon arrival: T0+11803 s

N_H (Galactic)	1.13 × 10²⁰ cm^-2
N_H (intrinsic)	2.3 (+0.5, -0.5) × 10²² cm^-2
z of absorber	2.33
Photon index	1.96 (+0.09, -0.09)
Flux (0.3-10 keV) (Observed)	1.16 (+0.07, -0.07) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.48 (+0.07, -0.07) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	3.44 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.39 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	383.22 (418)
Spectrum exposure	8.8 ks

Late Time spectrum (T0 + 4928 to 39505 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+13467 s

N_H (Galactic)	1.13 × 10²⁰ cm^-2
N_H (intrinsic)	2.3 (+0.5, -0.5) × 10²² cm^-2
z of absorber	2.33
Photon index	1.956 (+0.103, -0.100)
Flux (0.3-10 keV) (Observed)	9.3 (+0.6, -0.6) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.19 (+0.06, -0.06) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	3.44 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.37 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	382.10 (396)
Spectrum exposure	8.5 ks