A polarimetrically oriented X-ray stare at the accreting pulsar EXO 2030+375

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Volume 675 (July 2023)

A&A, 675 (2023) A29

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Table 1.

Best-fit parameters of the phase-averaged IXPE data on EXO 2030+375 obtained from spectro-polarimetric analysis using model const×tbabs(powerlaw×polconst) in the 2–8 keV energy band.

Parameter	Value
C_DU1 (fixed)	1
C_DU2	0.963 ± 0.003
C_DU3	0.928 ± 0.003
N_H [10²² cm⁻²]	1.93 ± 0.06
Γ	1.29 ± 0.01
Norm ^(a)	0.315 ± 0.006
PD [%]	1.2 ± 0.4
PA [deg]	39 ± 9
Flux_{2 − 10 keV}^(b)	2.47 ± 0.05
χ²/d.o.f.	1372/1334

Notes. All reported errors are at the 68% confidence level and based on the MCMC chain values.

^(a)

Normalization of the power law in units of photon keV⁻¹ cm⁻² s⁻¹ at 1 keV.

^(b)

Unabsorbed flux calculated for the entire model (in units of 10⁻⁹ erg cm⁻² s⁻¹), obtained using the cflux model from XSPEC as resulting from DU1.

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