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Swift-XRT spectra of GRB 201104B

Last updated after receiving ObsID 01004168011, version 9

Data were analysed using HEASOFT version 6.35.2

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Add time-sliced spectrum.

The spectral fits assume a redshift: 1.954 (GCN 28840)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 105 to 45758 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+263 s

N_H (Galactic)	5.69 × 10²⁰ cm^-2
N_H (intrinsic)	1.18 (+0.31, -0.29) × 10²² cm^-2
z of absorber	1.954
Photon index	1.79 (+0.07, -0.07)
Flux (0.3-10 keV) (Observed)	3.60 (+0.18, -0.17) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.38 (+0.17, -0.16) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	3.72 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.53 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	478.71 (539)
Spectrum exposure	347 s

PC mode. Mean photon arrival: T0+7171 s

N_H (Galactic)	5.69 × 10²⁰ cm^-2
N_H (intrinsic)	3.8 (+14.1, -3.8) × 10²¹ cm^-2
z of absorber	1.954
Photon index	1.45 (+0.33, -0.28)
Flux (0.3-10 keV) (Observed)	1.6 (+0.4, -0.3) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.7 (+0.4, -0.3) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4.54 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.92 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	90.16 (90)
Spectrum exposure	794 s

Late Time spectrum (T0 + 20937 to 45758 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+25248 s

N_H (Galactic)	5.69 × 10²⁰ cm^-2
N_H (intrinsic)	0 (+3.18 × 10²², -0) cm^-2
z of absorber	1.954
Photon index	1.5 (+0.7, -0.4)
Flux (0.3-10 keV) (Observed)	2.58 (+1.32, -0.98) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.74 (+1.34, -0.90) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	4.43 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.70 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	20.40 (26)
Spectrum exposure	692 s