X-ray view of a massive node of the cosmic web at z ∼ 3 - II. Discovery of extended X-ray emission around a hyperluminous quasar

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Volume 711 (July 2026)

A&A, 711 (2026) A242

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Table 2.

Observed fluxes and luminosities of the thermal and power-law components.

Regions	Components	F_{0.5 − 2 keV}/F_{2 − 10 keV}	L_{0.5 − 2 keV}/L_{2 − 10 keV}
		[erg/cm²/s]	[erg/s]
		(10⁻¹⁵)	(10⁴⁴)
0-2″	Thermal	$5 . 38_{- 1.14}^{+ 1.64}$ $Mathematical equation: $ 5.38^{+1.64}_{-1.14} $$ / $0 . 12_{- 0.05}^{+ 0.07}$ $Mathematical equation: $ 0.12^{+0.07}_{-0.05} $$	$12 . 22_{- 3.32}^{+ 4.68}$ $Mathematical equation: $ 12.22^{+4.68}_{-3.32} $$ / $6 . 15_{- 1.29}^{+ 2.03}$ $Mathematical equation: $ 6.15^{+2.03}_{-1.29} $$
	Power law	$44 . 11_{- 1.69}^{+ 1.74}$ $Mathematical equation: $ 44.11^{+1.74}_{-1.69} $$ / $46 . 49_{- 1.21}^{+ 1.76}$ $Mathematical equation: $ 46.49^{+1.76}_{-1.21} $$	$51 . 63_{- 4.36}^{+ 4.61}$ $Mathematical equation: $ 51.63^{+4.61}_{-4.36} $$ / $52 . 56_{- 1.97}^{+ 2.02}$ $Mathematical equation: $ 52.56^{+2.02}_{-1.97} $$

2″–3″	Thermal	$2 . 59_{- 0.46}^{+ 0.53}$ $Mathematical equation: $ 2.59^{+0.53}_{-0.46} $$ / $0 . 06_{- 0.02}^{+ 0.03}$ $Mathematical equation: $ 0.06^{+0.03}_{-0.02} $$	$5 . 79_{- 1.44}^{+ 2.11}$ $Mathematical equation: $ 5.79^{+2.11}_{-1.44} $$ / $3 . 00_{- 0.55}^{+ 0.61}$ $Mathematical equation: $ 3.00^{+0.61}_{-0.55} $$
	Power law	$0 . 79_{- 0.03}^{+ 0.03}$ $Mathematical equation: $ 0.79^{+0.03}_{-0.03} $$ / $0 . 84_{- 0.02}^{+ 0.03}$ $Mathematical equation: $ 0.84^{+0.03}_{-0.02} $$	$0 . 93_{- 0.08}^{+ 0.08}$ $Mathematical equation: $ 0.93^{+0.08}_{-0.08} $$ / $0 . 95_{- 0.04}^{+ 0.04}$ $Mathematical equation: $ 0.95^{+0.04}_{-0.04} $$

3″–5″	Thermal	$1 . 82_{- 0.39}^{+ 0.40}$ $Mathematical equation: $ 1.82^{+0.40}_{-0.39} $$ / $0 . 04_{- 0.01}^{+ 0.02}$ $Mathematical equation: $ 0.04^{+0.02}_{-0.01} $$	$4 . 03_{- 1.07}^{+ 1.64}$ $Mathematical equation: $ 4.03^{+1.64}_{-1.07} $$ / $2 . 13_{- 0.45}^{+ 0.43}$ $Mathematical equation: $ 2.13^{+0.43}_{-0.45} $$
	Power law	$0 . 31_{- 0.01}^{+ 0.01}$ $Mathematical equation: $ 0.31^{+0.01}_{-0.01} $$ / $0 . 33_{- 0.01}^{+ 0.01}$ $Mathematical equation: $ 0.33^{+0.01}_{-0.01} $$	$0 . 36_{- 0.03}^{+ 0.03}$ $Mathematical equation: $ 0.36^{+0.03}_{-0.03} $$ / $0 . 37_{- 0.01}^{+ 0.01}$ $Mathematical equation: $ 0.37^{+0.01}_{-0.01} $$

Notes. Observed absorbed fluxes in the 0.5–2 keV and 2–10 keV bands, and intrinsic (unabsorbed) luminosities in the corresponding rest-frame bands, for the thermal and power-law components in the inner and outer annuli. Quoted uncertainties correspond to the 16th and 84th percentiles of the posterior distributions. These values were computed using the best-fit model parameters reported in Table 1.

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