J/ApJ/927/42 Seyfert 1 AGNs with X-ray sp. from NuSTAR+Swift (Kamraj+, 2022)
X-ray coronal properties of Swift/BAT-selected Seyfert 1 Active Galactic Nuclei.
Kamraj N., Brightman M., Harrison F.A., Stern D., Garcia J.A.,
Balokovic M., Ricci C., Koss M.J., Mejia-Restrepo J.E., Oh K.,
Powell M.C., Urry C.M.
<Astrophys. J., 927, 42 (2022)>
=2022ApJ...927...42K 2022ApJ...927...42K
ADC_Keywords: Active gal. nuclei; X-ray sources; Galaxies, Seyfert; Redshifts
Keywords: Active galactic nuclei ; Black holes ; X-ray sources ;
Seyfert galaxies
Abstract:
The corona is an integral component of active galactic nuclei (AGNs)
which produces the bulk of the X-ray emission above 1-2keV. However,
many of its physical properties and the mechanisms powering this
emission remain a mystery. In particular, the temperature of the
coronal plasma has been difficult to constrain for large samples of
AGNs, as constraints require high-quality broadband X-ray spectral
coverage extending above 10keV in order to measure the high-energy
cutoff, which provides constraints on the combination of coronal
optical depth and temperature. We present constraints on the coronal
temperature for a large sample of Seyfert 1 AGNs selected from the
Swift/BAT survey using high-quality hard X-ray data from the NuSTAR
observatory combined with simultaneous soft X-ray data from Swift/XRT
or XMM-Newton. When applying a physically motivated, nonrelativistic
disk-reflection model to the X-ray spectra, we find a mean coronal
temperature kTe=84±9keV. We find no significant correlation
between the coronal cutoff energy and accretion parameters such as the
Eddington ratio and black hole mass. We also do not find a
statistically significant correlation between the X-ray photon index,
Γ, and Eddington ratio. This calls into question the use of such
relations to infer properties of supermassive black hole systems.
Description:
From our sample of unobscured Seyfert 1 AGNs, we selected sources that
had been observed by NuSTAR, both as part of the Extragalactic Legacy
Survey and Guest Observer program observations. In addition to the
NuSTAR observations, where available we utilize simultaneous soft
X-ray data in the 0.4-10keV band taken with either the Swift/XRT or
XMM-Newton/EPIC instruments.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 116 506 Redshifts, black hole masses and best-fit spectral
parameters from fitting broadband X-ray data
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See also:
B/swift : Swift Master Catalog (HEASARC, 2004-)
B/xmm : XMM-Newton Obs. Log (XMM-Newton Science Operation Center, 2012)
VIII/76 : Leiden/Argentine/Bonn (LAB) Survey of Galactic HI (Kalberla+ 2005)
J/A+A/505/417 : Second INTEGRAL AGN catalogue (Beckmann+, 2009)
J/MNRAS/397/1177 : Swift-XRT observations of GRBs (Evans+, 2009)
J/ApJS/207/19 : Hard X-ray survey from Swift-BAT 6yrs (Baumgartner+, 2013)
J/MNRAS/466/3309 : X-ray flux variability of AGN (Rani+, 2017)
J/ApJ/836/99 : NuSTAR serendipitous survey: 40-month cat. (Lansbury+, 2017)
J/ApJ/850/74 : Swift/BAT AGN Spectroscopic Survey. I. (Koss+, 2017)
J/ApJS/233/17 : Swift/BAT AGN spectroscopic survey. V. X-ray (Ricci+, 2017)
J/ApJS/235/4 : 105-month Swift-BAT all-sky hard X-ray survey (Oh+, 2018)
J/ApJ/869/171 : Chandra observations of NuSTAR sources (Tomsick+, 2018)
J/A+A/640/A31 : R-Gamma correlation of Swift/BAT AGN (Panagiotou+, 2020)
J/ApJS/257/61 : X-ray spectral study of 57 local U/LIRGs (Yamada+, 2021)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Obs Observation type code (1)
4- 6 A3 --- Mod Model code (2)
8- 30 A23 --- Name Source identifier
32 A1 --- f_Name f: need fit
34- 38 F5.3 --- zBest [0.002/0.2] Best redshift
40- 43 F4.2 [Msun] logMBH [0.0/9.83] Best log blackhole mass
45- 52 F8.5 --- gamma [-4.16/3.8] X-ray photon index
54- 61 F8.5 --- b_gamma [-4.7/3.7]? Lower uncertainty boundary in gamma
63- 70 F8.5 --- B_gamma [-3/4.6]? Upper uncertainty boundary in gamma
72- 81 E10.4 keV eCut/kT [1/1000000] Median cutoff energy
or kTe (4)(3)
83- 92 E10.4 keV b_eCut/kT [0.01/536000]? Lower uncertainty boundary
in eCut/kT (4)
94-103 E10.4 keV B_eCut/kT [1.49/15854]? Upper uncertainty boundary
in eCut/kT (4)
105-111 F7.2 -- CStat [75.7/8002] Cash statistic
113-116 I4 --- DoF [247/4788] Degrees of Freedom
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Note (1): Code as follows:
SS = single simultaneous swift observation;
MS = multiple simultaneous swift observations;
MX = multiple simultaneous XMM observations.
Note (2): Applied XSPEC models as follows:
ABS = cins * TB-ABS_ * ZPHABS * CUTOFFPL;
PEX = cins * TB-ABS_ * ZPHABS * (CUTOFFPL + ZGAUSS + PEXRAV);
XIL = cins * TB-ABS_ * ZPHABS * (XILLVERCP + ZGAUSS).
Note (3): This is Ecut for the X and Y models and kTe for Z models
Note (4): When B_eCut/kT has values of 0 (or null) there is no upper limit
constraint and thus the observation only has a lower limit on
eCut/kT. Likewise, when b_eCut/kT has values of 0 (or null) there
is no lower limit constraint and eCut/kT only has an upper limit.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 10-Nov-2023