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Swift-XRT spectra of GRB 250509A

Last updated after receiving ObsID 01311764004, version 7

Data were analysed using HEASOFT version 6.35.2

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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	2.022 (+0.104, -0.100)
Flux (0.3-10 keV) (Observed)	9.1 (+0.5, -0.4) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.594 (+0.114, -0.083) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	4.19 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	7.30 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	534.93 (596)
Spectrum exposure	156 s

PC mode. Mean photon arrival: T0+8060 s

N_H (Galactic)	2.03 × 10²⁰ cm^-2
N_H (intrinsic)	6.26 (+1.06, -0.96) × 10²¹ cm^-2
z of absorber	0
Photon index	2.16 (+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)	4.11 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	7.88 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	372.83 (409)
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, -1.2) × 10²¹ cm^-2
z of absorber	0
Photon index	2.20 (+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)	1.195 (+0.076, -0.133) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4.03 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	7.96 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	314.58 (340)
Spectrum exposure	7.6 ks