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Swift-XRT spectra of GRB 250101A

Last updated after receiving ObsID 01278305007, version 19

Data were analysed using HEASOFT version 6.35.2

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Add time-sliced spectrum.

The spectral fits assume a redshift: 2.49 (GCN 38759)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 131 to 44408 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+136 s

N_H (Galactic)	1.44 × 10²¹ cm^-2
N_H (intrinsic)	1.9 (+4.7, -1.6) × 10²³ cm^-2
z of absorber	2.49
Photon index	4.6 (+11.8, -1.2)
Flux (0.3-10 keV) (Observed)	5.3 (+4.8, -2.7) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.8 (+16.4, -1.5) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	1.90 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.41 × 10^-10 erg cm^-2 ct^-1
W-stat (dof) What's this?	22.77 (29)
Spectrum exposure	11 s

PC mode. Mean photon arrival: T0+8703 s

N_H (Galactic)	1.44 × 10²¹ cm^-2
N_H (intrinsic)	1.4 (+1.2, -1.0) × 10²² cm^-2
z of absorber	2.49
Photon index	1.90 (+0.16, -0.15)
Flux (0.3-10 keV) (Observed)	5.3 (+0.5, -0.5) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	7.0 (+0.6, -0.5) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.81 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.05 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	288.83 (319)
Spectrum exposure	7.6 ks

Late Time spectrum (T0 + 4206 to 44408 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+16895 s

N_H (Galactic)	1.44 × 10²¹ cm^-2
N_H (intrinsic)	1.1 (+1.7, -1.1) × 10²² cm^-2
z of absorber	2.49
Photon index	1.98 (+0.23, -0.21)
Flux (0.3-10 keV) (Observed)	2.7 (+0.4, -0.3) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.6 (+0.4, -0.4) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.61 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.90 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	199.38 (220)
Spectrum exposure	6.8 ks