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Swift-XRT spectra of GRB 211227A

Last updated after receiving ObsID 01091101004, version 14

Data were analysed using HEASOFT version 6.35.2

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 79 to 73704 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+130 s

N_H (Galactic)	2.37 × 10²⁰ cm^-2
N_H (intrinsic)	2.1 (+0.5, -0.4) × 10²¹ cm^-2
z of absorber	0
Photon index	1.09 (+0.07, -0.07)
Flux (0.3-10 keV) (Observed)	1.82 (+0.08, -0.08) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.98 (+0.07, -0.07) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	6.21 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.77 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	680.12 (693)
Spectrum exposure	182 s

PC mode. Mean photon arrival: T0+1455 s

N_H (Galactic)	2.37 × 10²⁰ cm^-2
N_H (intrinsic)	3.7 (+2.3, -1.8) × 10²¹ cm^-2
z of absorber	0
Photon index	3.2 (+0.8, -0.7)
Flux (0.3-10 keV) (Observed)	7.9 (+2.1, -1.6) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.1 (+4.5, -0.9) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	2.41 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	9.48 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	52.30 (83)
Spectrum exposure	9.3 ks

Late Time spectrum (T0 + 4682 to 73704 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+13388 s

N_H (Galactic)	2.37 × 10²⁰ cm^-2
N_H (intrinsic)	5 (+31, -5) × 10²¹ cm^-2
z of absorber	0
Photon index	1.9 (+3.1, -1.6)
Flux (0.3-10 keV) (Observed)	6 (+5, -4) × 10^-14 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	9.5 (+23.1, -5.8) × 10^-14 erg cm^-2 s^-1
Counts to flux (obs)	4.42 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	7.06 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	6.18 (6)
Spectrum exposure	8.5 ks