A possible two-fold scenario for the disc-corona of the luminous active galactic nucleus 1H 0419-577: A high-density disc or a warm corona

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Volume 700 (August 2025)

A&A, 700 (2025) A81

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Table A.1.

Simultaneous fits of the two 2018 XMM-Newton and NuSTAR spectra over the 0.3-79 keV range with the RELXILLCP relativistic reflection model corrected for Galactic absorption.

Parameters
a	≥0.99	0.988±0.004
θ (degrees)	30.6 $_{- 4.5}^{+ 3.5}$ $^{+3.5}_{-4.5}$	≤7.6
A_Fe	0.6 $_{- 0.1}^{+ 0.2}$ $^{+0.2}_{-0.1}$	2.4 $_{- 1.1}^{+ 1.0}$ $^{+1.0}_{-1.1}$
log(n_e)	15 (f)	19.5 $_{- 0.1}^{+ 0.2}$ $^{+0.2}_{-0.1}$

	May 2018

q₁	≥6.2	≥9.2
q₂	2.7±0.2	4.2±0.1
R_br (R_g)	2.9 $_{- 0.4}^{+ 1.0}$ $^{+1.0}_{-0.4}$	2.8±0.2
kT_hot (keV)	≥222	≥237
Γ_hot	2.28±0.02	1.71±0.01
log ξ ^(a)	0.10 $_{- 0.08}^{+ 0.10}$ $^{+0.10}_{-0.08}$	3.2±0.1
ℛ	7.3 $_{- 0.9}^{+ 1.1}$ $^{+1.1}_{-0.9}$	3.2 $_{- 0.3}^{+ 1.4}$ $^{+1.4}_{-0.3}$
norm_relxillcp ^(b)	4.5±0.1	3.3 $_{- 0.6}^{+ 0.2}$ $^{+0.2}_{-0.6}$

	Nov. 2018

q₁	≥7.6	≥8.8
q₂	3.2±0.2	4.4±0.1
R_br (R_g)	2.4 $_{- 0.2}^{+ 0.7}$ $^{+0.7}_{-0.2}$	2.6±0.1
kT_hot (keV)	≥203	≥193
Γ_hot	2.28 $_{- 0.02}^{+ 0.03}$ $^{+0.03}_{-0.02}$	1.71±0.01
log ξ ^(a)	0.11 $_{- 0.03}^{+ 0.10}$ $^{+0.10}_{-0.03}$	3.2±0.1
ℛ	7.7 $_{- 1.0}^{+ 1.2}$ $^{+1.2}_{-1.0}$	2.9 $_{- 0.6}^{+ 0.7}$ $^{+0.7}_{-0.6}$
norm_relxillcp ^(b)	5.0±0.1	4.1 $_{- 0.7}^{+ 0.3}$ $^{+0.3}_{-0.7}$


χ²/d.o.f.	1631.7/1435^(c)	1539.1/1434
$χ_{red}^{2}$ $\chi^{2}_{\mathrm{red}}$	1.14	1.07

Note. (f) means that the value has been fixed. ^(a) The ionisation parameter ξ is expressed in units of erg cm s⁻¹. ^(b) The normalisation of the RELXILLCP model is expressed in ×10⁻⁵. ^(c) Though the reduced χ² value appears satisfactory, a prominent excess is observed on the data-to-model ratio above about 30 keV as illustrated in Fig. A.1 (top panel).

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