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Swift-XRT spectra of GRB 191221B

Last updated after receiving ObsID 00945521028, version 15

Data were analysed using HEASOFT version 6.35.2

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The spectral fits assume a redshift: 1.148 (GCN 26553)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 90 to 79536 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+520 s

N_H (Galactic)	8.63 × 10²⁰ cm^-2
N_H (intrinsic)	3.8 (+24.8, -3.8) × 10¹⁹ cm^-2
z of absorber	1.148
Photon index	2.043 (+0.021, -0.016)
Flux (0.3-10 keV) (Observed)	9.38 (+0.11, -0.12) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.143 (+0.013, -0.010) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	3.18 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.87 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	758.49 (784)
Spectrum exposure	1.3 ks

PC mode. Mean photon arrival: T0+23856 s

N_H (Galactic)	8.63 × 10²⁰ cm^-2
N_H (intrinsic)	0 (+9.11 × 10²⁰, -0) cm^-2
z of absorber	1.148
Photon index	1.86 (+0.09, -0.05)
Flux (0.3-10 keV) (Observed)	1.28 (+0.06, -0.07) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.49 (+0.06, -0.06) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	3.54 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.13 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	413.90 (439)
Spectrum exposure	10.5 ks

Late Time spectrum (T0 + 4866 to 79536 s)

Download spectral files for Late Time spectrum.

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+23856 s

N_H (Galactic)	8.63 × 10²⁰ cm^-2
N_H (intrinsic)	0 (+9.11 × 10²⁰, -0) cm^-2
z of absorber	1.148
Photon index	1.86 (+0.09, -0.05)
Flux (0.3-10 keV) (Observed)	1.28 (+0.06, -0.07) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.49 (+0.06, -0.06) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	3.54 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.13 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	413.90 (439)
Spectrum exposure	10.5 ks