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Swift-XRT spectra of GRB 250108B

Last updated after receiving ObsID 01280056020, version 11

Data were analysed using HEASOFT version 6.35.2

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 114 to 33755 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+358 s

N_H (Galactic)	1.16 × 10²⁰ cm^-2
N_H (intrinsic)	1.34 (+0.09, -0.09) × 10²¹ cm^-2
z of absorber	0
Photon index	2.34 (+0.04, -0.04)
Flux (0.3-10 keV) (Observed)	9.88 (+0.17, -0.17) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.468 (+0.025, -0.030) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	2.86 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.26 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	724.82 (694)
Spectrum exposure	612 s

PC mode. Mean photon arrival: T0+11040 s

N_H (Galactic)	1.16 × 10²⁰ cm^-2
N_H (intrinsic)	1.3 (+0.5, -0.4) × 10²¹ cm^-2
z of absorber	0
Photon index	2.06 (+0.17, -0.16)
Flux (0.3-10 keV) (Observed)	5.6 (+0.5, -0.5) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	7.4 (+0.6, -0.5) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.36 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.43 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	267.67 (299)
Spectrum exposure	7.9 ks

Late Time spectrum (T0 + 5522 to 33755 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+16710 s

N_H (Galactic)	1.16 × 10²⁰ cm^-2
N_H (intrinsic)	1.1 (+0.6, -0.5) × 10²¹ cm^-2
z of absorber	0
Photon index	2.03 (+0.20, -0.19)
Flux (0.3-10 keV) (Observed)	2.9 (+0.3, -0.3) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.68 (+0.36, -0.27) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.38 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.32 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	210.64 (245)
Spectrum exposure	7.6 ks