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Swift-XRT spectra of GRB 250509A

Last updated after receiving ObsID 01311764002, version 5

Data were analysed using HEASOFT version 6.32

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 77 to 43819 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+116 s

N_H (Galactic)	2.03 × 10²⁰ cm^-2
N_H (intrinsic)	6.4 (+0.7, -0.7) × 10²¹ cm^-2
z of absorber	0
Photon index	2.02 (+0.11, -0.10)
Flux (0.3-10 keV) (Observed)	9.2 (+0.5, -0.5) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.597 (+0.115, -0.084) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	4.19 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	7.31 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	631.04 (590)
Spectrum exposure	156 s

PC mode. Mean photon arrival: T0+8060 s

N_H (Galactic)	2.03 × 10²⁰ cm^-2
N_H (intrinsic)	6.21 (+1.04, -0.95) × 10²¹ cm^-2
z of absorber	0
Photon index	2.17 (+0.16, -0.15)
Flux (0.3-10 keV) (Observed)	8.7 (+0.7, -0.6) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.67 (+0.22, -0.15) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4.09 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	7.86 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	375.55 (392)
Spectrum exposure	8.1 ks

Late Time spectrum (T0 + 4348 to 43819 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+11608 s

N_H (Galactic)	2.03 × 10²⁰ cm^-2
N_H (intrinsic)	6.2 (+1.3, -1.1) × 10²¹ cm^-2
z of absorber	0
Photon index	2.22 (+0.20, -0.19)
Flux (0.3-10 keV) (Observed)	6.0 (+0.6, -0.5) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.198 (+0.208, -0.072) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	3.99 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	7.99 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	304.71 (334)
Spectrum exposure	7.6 ks