An X-ray flaring event and a variable soft X-ray excess in the Seyfert LCRS B040659.9–385922 as detected with eROSITA

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Volume 691 (November 2024)

A&A, 691 (2024) A102

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Table 2.

Results of the spectral fit to the XMM-Newton EPIC spectra.

Component	Parameters	August 2021	March 2022
		XMM1	XMM2
CONSTANT × TBABS × (ZPOWERLW + ZPOWERLW)

SXPL	Γ_SX	2.79 ± 0.04	$2 . 19_{- 0.06}^{+ 0.08}$ $2.19^{+0.08}_{-0.06}$
	Norm. (×10⁻⁴)	$9 . 59_{- 0.49}^{+ 0.52}$ $9.59^{+0.52}_{-0.49}$	$4 . 17_{- 0.36}^{+ 0.35}$ $4.17^{+0.35}_{-0.36}$
HXPL	Γ_HX	$1 . 28_{- 0.10}^{+ 0.08}$ $1.28^{+0.08}_{-0.10}$	$1 . 12_{- 0.18}^{+ 0.15}$ $1.12^{+0.15}_{-0.18}$
	Norm. (×10⁻⁴)	$2 . 67_{- 0.48}^{+ 0.43}$ $2.67^{+0.43}_{-0.48}$	0.79 ± 0.32
	χ²/d.o.f.	1630.75/1631	958.66/1014
	χ_red²	0.99	0.96

CONSTANT × TBABS × (ZBBODY + ZPOWERLW)

BB	k_BT_e (keV)	0.095 ± 0.003	$0 . 112_{- 0.015}^{+ 0.011}$ $0.112^{+0.011}_{-0.015}$
	Norm. (×10⁻⁵)	2.46 ± 0.09	$0 . 32_{- 0.08}^{+ 0.06}$ $0.32^{+0.06}_{-0.08}$
HXPL	Γ_HX	$2 . 03_{- 0.02}^{+ 0.03}$ $2.03^{+0.03}_{-0.02}$	$1 . 84_{- 0.01}^{+ 0.03}$ $1.84^{+0.03}_{-0.01}$
	Norm. (×10⁻³)	1.08 ± 0.02	$0 . 46_{- 0.01}^{+ 0.02}$ $0.46^{+0.02}_{-0.01}$
	χ²/d.o.f.	1788.32/1631	967.82/1014
	χ_red²	1.09	0.95
CONSTANT × TBABS × (COMPTT + ZPOWERLW)
compTT	k_BT₀ (eV)	20 (F)	20 (F)
	k_BT_e (keV)	0.3 (F)	0.3 (F)
	τ	12.3 ± 0.3	$14 . 9_{- 1.1}^{+ 0.9}$ $14.9^{+0.9}_{-1.1}$
	Norm. (×10⁻²)	$27 . 3_{- 1.8}^{+ 2.0}$ $27.3^{+2.0}_{-1.8}$	$2 . 64_{- 0.40}^{+ 0.41}$ $2.64^{+0.41}_{-0.40}$
HXPL	Γ_HX	1.76 ± 0.04	$1 . 67_{- 0.05}^{+ 0.06}$ $1.67^{+0.06}_{-0.05}$
	Norm. (×10⁻⁴)	$7 . 79_{- 0.39}^{+ 0.40}$ $7.79^{+0.40}_{-0.39}$	$3 . 83_{- 0.27}^{+ 0.28}$ $3.83^{+0.28}_{-0.27}$
	χ²/d.o.f.	1627.43/1631	945.41/1014
	χ_red²	1.00	0.93

Notes. Hydrogen column density is fixed to the Galactic value of 1.27 × 10²⁰ cm⁻² and the redshift of the source is fixed at z = 0.057. (F) means that the parameter is frozen. For power-law components, Norm. denotes the value of the power law at 1 keV in units of ph cm⁻² s⁻¹ keV⁻¹.

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