J/A+A/662/A98 Literature low-z measurements (Bertola+, 2022)
The properties of the X-ray corona in the distant (z = 3.91) quasar
APM 08279+5255.
Bertola E., Vignali C., Lanzuisi G., Dadina M., Cappi M., Gilli R.,
Matzeu G.A., Chartas G., Piconcelli E., Comastri A.
<Astron. Astrophys., 662, A98 (2022)>
=2022A&A...662A..98B 2022A&A...662A..98B (SIMBAD/NED BibCode)
ADC_Keywords: QSOs ; Redshifts ; X-ray sources
Keywords: accretion, accretion disks - black hole physics -
quasars: absorption lines - quasars: supermassive black holes -
quasars: individual: APM 08279+5255 - X-rays: general
Abstract:
We present new joint XMM-Newton and NuSTAR observations of APM
08279+5255, a gravitationally-lensed, broad-absorption line quasar
(z=3.91). After showing a fairly stable flux
(f2-10~=4-5.5x10-13erg/s) from 2000 to 2008, APM 08279+5255 was
found in a fainter state in the latest X-ray exposures
(f2-10~=2.7x10-13erg/s), which can likely be ascribed to a lower
X-ray activity. Moreover, the 2019 data present a prominent Fe
Kα emission line and do not show any significant absorption
line. This fainter state, coupled to the first hard X-ray sampling of
APM 08279+5255, allowed us to measure X-ray reflection and the
high-energy cutoff in this source for the first time. From the
analysis of previous XMM-Newton and Chandra observations, X-ray
reflection is demonstrated to be a long-lasting feature of this
source, but less prominent prior to 2008, possibly due to a stronger
primary emission. The estimated high-energy cutoff
(Ecut=99-35+91keV) sets a new redshift record for the farthest
ever measured and places APM 08279+5255 in the allowed region of the
compactness-temperature diagram of X-ray coronae, in agreement with
previous results on high-z quasars.
Description:
High-energy cutoff measurements by NuSTAR and non-focusing telescopes,
literature low-z measurements collected by Lanzuisi et al.
(2019ApJ...875L..20L 2019ApJ...875L..20L) and in this work.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 55 43 Literature low-z measurements collected
by Lanzuisi et al. (2019ApJ...875L..20L 2019ApJ...875L..20L)
tablea2.dat 51 162 Literature low-z measurements collected
in this work
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Byte-by-byte Description of file: tablea1.dat tablea2.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Name Source name
19 A1 --- n_Name [*] Note (1)
21- 27 F7.5 --- z Redshift
29- 33 F5.2 [10-7W] logL2-10 Logarithm of the 2-10keV luminosity
35 A1 --- l_Ecut Limit flag on Ecut
36- 38 I3 keV Ecut High-energy cutoff
39 A1 --- --- [+]
40- 42 I3 keV E_Ecut ? Error on Ecut (upper value)
44 A1 --- --- [-]
45- 47 I3 keV e_Ecut ? Error on Ecut (lower value)
49 I1 --- Flag [1/2] Telescope flag (2)
51- 55 A5 --- Refs References (3)
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Note (1): Note as follows:
* = AGN with multiple observations in Dadina (2007A&A...461.1209D 2007A&A...461.1209D).
Observation dates of selected measurements:
1996-12-06 for NGC4151, 2000-11-08 for Mrk 509.
Note (2): Telescope flag as follows:
1 = NuSTAR
2 = non-focusing
Note (3): References as follows:
a = Fabian et al. (2015MNRAS.451.4375F 2015MNRAS.451.4375F)
b = Lanzuisi et al. (2019ApJ...875L..20L 2019ApJ...875L..20L)
c = Malizia et al. (2014ApJ...782L..25M 2014ApJ...782L..25M)
d = Molina et al. (2019MNRAS.484.2735M 2019MNRAS.484.2735M)
e = Vasudevan et al. (2013ApJ...763..111V 2013ApJ...763..111V, Cat. J/ApJ/763/111)
f = Younes et al. (2019ApJ...870...73Y 2019ApJ...870...73Y)
g = Buisson et al. (2018MNRAS.480.3689B 2018MNRAS.480.3689B)
h = Kammoun et al. (2017MNRAS.465.1665K 2017MNRAS.465.1665K)
i = Tortosa et al. (2017MNRAS.466.4193T 2017MNRAS.466.4193T)
j = Dadina (2007A&A...461.1209D 2007A&A...461.1209D)
k = Kara et al. (2017MNRAS.468.3489K 2017MNRAS.468.3489K)
l = Tortosa et al. (2018A&A...614A..37T 2018A&A...614A..37T)
m = Middei et al. (2020A&A...635A..18M 2020A&A...635A..18M)
n = Ursini et al. (2020A&A...634A..92U 2020A&A...634A..92U)
o = Middei et al. (2021A&A...647A.102M 2021A&A...647A.102M)
p = Reeves et al. (2021MNRAS.500.1974R 2021MNRAS.500.1974R)
q = Kamraj et al. (2018ApJ...866..124K 2018ApJ...866..124K)
r = Balokovic et al. (2020ApJ...905...41B 2020ApJ...905...41B)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 25-Aug-2022