The WISSH quasar project - XII. X-ray view of the most luminous quasi-stellar objects at Cosmic Noon

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Volume 702 (October 2025)

A&A, 702 (2025) A114

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Table C.3.

WISSH QSOs with multiple X-ray observations showing > 3σ F_{0.5 − 2} and F_2 − 10 variability.

Obs. ID	Γ	N_H	Log(L_2 − 10)	Log(F_{0.5 − 2})	Log(F_2 − 10)	α_OX	Δ(α_OX)	Δt_rest
(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)
WISSH70 – J1521+5202
6808	1.8^f	5^f	44.16 ± 0.23	−14.78 ± 0.23	−14.34 ± 0.23	−2.41 ± 0.09	−0.59	825
15334	$1 . 58_{- 0.37}^{+ 0.38}$ $1.58_{-0.37}^{+0.38}$	$11 . 4_{- 4.4}^{+ 5.2}$ $11.4_{-4.4}^{+5.2}$	44.91 ± 0.06	−14.26 ± 0.06	−13.50 ± 0.10	−2.16 ± 0.06	−0.33	654
0840440101/0840440201	1.8^f	$152 . 4_{- 63.3}^{+ 115.3}$ $152.4_{-63.3}^{+115.3}$	43.56 ± 0.17	−15.28 ± 0.14	−14.07 ± 0.14	−2.64 ± 0.07	−0.82

WISSH82 – J1701+6412
9756	1.83 ± 0.12	≤3.1	45.65 ± 0.03	−13.25 ± 0.04	−13.07 ± 0.07	−1.84 ± 0.02	−0.01	536
0723700101	2.20 ± 0.05	0.8 ± 0.2	46.13 ± 0.01	−12.75 ± 0.01	−12.77 ± 0.03	−1.61 ± 0.01	0.22	14
0723700201	2.21 ± 0.06	0.6 ± 0.2	45.98 ± 0.01	−12.90 ± 0.01	−12.94 ± 0.03	−1.66 ± 0.01	0.17	7
0723700301	$2 . 20_{- 0.15}^{+ 0.16}$ $2.20_{-0.15}^{+0.16}$	0.8 ± 0.2	45.95 ± 0.01	−12.93 ± 0.01	−12.95 ± 0.03	−1.67 ± 0.01	0.15

WISSH83 – J2123-0050
6822	$2 . 34_{- 0.45}^{+ 0.47}$ $2.34_{-0.45}^{+0.47}$	≤1.5	45.05 ± 0.10	−13.60 ± 0.10	−13.75 ± 0.28	−1.89 ± 0.07	−0.11	960
0745010401	2.27 ± 0.14	0.7 ± 0.3	45.34 ± 0.02	−13.34 ± 0.02	−13.39 ± 0.06	−1.79 ± 0.02	−0.004	123
17080	1.97 ± 0.07	≤0.7	45.69 ± 0.02	−13.01 ± 0.02	−12.92 ± 0.03	−1.69 ± 0.01	0.09

Notes. Columns: (1) Observation ID. The ID in boldface refers to the dataset from which the reference results for the tables and figures in the study were derived; (2) X-ray photon index; (3) Intrinsic column density (in units of 10²² cm⁻²); (4) Intrinsic 2 − 10 keV luminosity (in units of Log(L_2 − 10/erg s⁻¹)); (5) 0.5 − 2 keV flux (in units of Log(F_{0.5 − 2}/erg s⁻¹ cm⁻²)); (6) 2 − 10 keV flux (in units of Log(F_2 − 10/erg s⁻¹ cm⁻²)); (7) X-ray–to–optical index; (8) Δ(α_OX) = α_OX − α_OX, L10; (9) Rest-frame time interval (in units of days).

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