J/MNRAS/494/5793 IR photometry and SEDs of hard X-ray AGNs (Kilerci+, 2020)
Infrared colours and spectral energy distributions of hard X-ray selected
obscured and Compton-thick active galactic nuclei.
Kilerci Eser E., Goto T., Guver T., Tuncer A., Atas O.H.
<Mon. Not. R. Astron. Soc., 494, 5793-5810 (2020)>
=2020MNRAS.494.5793K 2020MNRAS.494.5793K (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Positional data ; Redshifts ; Photometry ;
Infrared ; X-ray sources
Keywords: galaxies: active - quasars: general - infrared: galaxies
Abstract:
We investigate the infrared colours and spectral energy distributions
(SEDs) of 338 X-ray selected active galactic nuclei (AGNs) from the
Swift/Burst Alert Telescope (BAT) 105-month survey catalogue, which
have been detected using AKARI, in order to find new selection
criteria for Compton-thick AGNs. By combining data from the Galaxy
Evolution Explorer (GALEX), the Sloan Digital Sky Survey (SDSS) Data
Release 14 (DR14), the Two-Micron All Sky Survey (2MASS), the
Wide-field Infrared Survey Explorer (WISE), AKARI and Herschel for the
first time, we perform ultraviolet (UV) to far-infrared (FIR) SEDs,
fitting 158 Swift/BAT AGNs using CIGALE and constraining the AGN model
parameters of obscured and Compton-thick AGNs. The comparison of
average SEDs shows that while the mid-infrared (MIR) SEDs are similar
for the three AGN populations, the optical/UV and FIR regions have
differences. We measure the dust luminosity, the pure AGN luminosity
and the total infrared luminosity. We examine the relationships
between the measured infrared luminosities and the hard X-ray
luminosity in the 14-195keV band. We show that the average covering
factor of Compton-thick AGNs is higher compared with the obscured and
unobscured AGNs. We present new infrared selection criteria for
Compton-thick AGNs based on MIR and FIR colours ([9-22µm]>3.0 and
[22-90µm]<2.7) from WISE and AKARI. We find two known Compton-thick
AGNs that are not included in the Swift/BAT sample. We conclude that
MIR colours covering 9.7-µm silicate absorption and the MIR
continuum could be promising new tools to identify Compton-thick AGNs.
Description:
The Swift observatory (Gehrels et al. 2004ApJ...611.1005G 2004ApJ...611.1005G) scans the
whole sky at 14-195 keV with the wide-field BAT (Barthelmy et al.
2005SSRv..120..143B 2005SSRv..120..143B). With its continuous all-sky survey, Swift/BAT
identified several hard-X-ray selected AGNs in the local Universe
(e.g. Tueller et al. 2008ApJ...681..113T 2008ApJ...681..113T, Cat. J/ApJ/681/113;
Baumgartner et al. 2013ApJS..207...19B 2013ApJS..207...19B, Cat. J/ApJS/207/19; Ricci et
al. 2017ApJS..233...17R 2017ApJS..233...17R, Cat. J/ApJS/233/17; Oh et al.
2018ApJS..235....4O 2018ApJS..235....4O, Cat. J/ApJS/235/4). The most recent data release
of Swift/BAT includes 947 hard X-ray selected non-beamed AGNs. We
cross-match these hard X-ray selected AGNs based on their optical
counterpart coordinates within the AKARI/FIS all-sky survey bright
source catalogue version 2 (Yamamura et al. 2018cwla.conf..227Y)
within a radius of 20arcsec. We find the AKARI 90-µm detection for
378 AGNs, which is near the peak of the FIR dust emission near
100µm.
The Swift/BAT Spectroscopic Survey (BASS; Koss et al.
2017ApJ...850...74K 2017ApJ...850...74K, Cat. J/ApJ/850/74) data release 1 provides
multiwavelength data of 836 local AGNs from the Swift/BAT 70-month
catalogue (Baumgartner et al. 2013ApJS..207...19B 2013ApJS..207...19B, Cat.
J/ApJS/207/19). The broad-band X-ray (between 0.3-150keV) spectral
analysis of the BASS AGN sample is completed by Ricci et al.
(2017ApJS..233...17R 2017ApJS..233...17R, Cat. J/ApJS/233/17). BASS includes 311 of the
AGNs in our AKARI AGN sample, so for these sources we adopt the NH
values from BASS; except for ESO244-IG030 and ESO317-G041 for which we
adopt the revised NH measurements from Marchesi et al.
(2019ApJ...882..162M 2019ApJ...882..162M). For 19 AGNs in our AKARI AGN sample, we take
published NH values from the literature. In total, 338 AGNs in our
sample have NH measurements (see Table 1).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 265 338 Hard X-ray selected AKARI AGN sample
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See also:
J/ApJ/681/113 : Swift BAT survey of AGNs (Tueller+, 2008)
J/ApJS/207/19 : Hard X-ray survey from Swift-BAT 2004-2010
(Baumgartner+, 2013)
J/ApJS/233/17 : Swift/BAT AGN spectroscopic survey. V. X-ray data
(Ricci+, 2017)
J/ApJS/235/4 : The 105-month Swift-BAT all-sky hard X-ray survey (Oh+, 2018)
J/ApJ/850/74 : Swift/BAT AGN Spectroscopic Survey. I. (Koss+, 2017)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 A12 --- Swift Swift-BAT source name (JHHMM.m+DDMM)
14- 27 A14 --- Akari AKARI source name (HHMMSSs+DDMMSS)
29- 37 F9.5 deg RAdeg Right ascension (J2000)
39- 47 F9.5 deg DEdeg Declination (J2000)
49- 55 F7.5 --- z ? Redshift from the Swift-BAT 105-month
survey catalogue
57- 60 F4.1 [cm-2] logNH Logarithm of the Hydrogen column density
62- 64 F3.1 [cm-2] e_logNH Lower error on logNH
66- 68 F3.1 [cm-2] E_logNH Upper error on logNH
70- 143 A74 --- r_logNH Reference for logNH
145- 152 F8.4 [10-7W] logLIR ?=-99 Logarithm of the pure AGN
luminosity in the IR band (1)
154- 161 F8.4 [10-7W] e_logLIR ?=-99 Error on logLIR
163- 170 F8.4 --- fracAGN ?=-99 Fractional AGN emission
contribution to the total IR luminosity
(1)
172- 178 F7.4 [10-7W] logLX ? Logarithm of the 14-195keV luminosity
from Swift-BAT 105-month survey catalogue
180- 187 F8.4 mag W4mag ?=-99 WISE W4 (22um) band magnitude (2)
189- 196 F8.4 mag e_W4mag ?=-99 Error on W4mag
198- 205 F8.4 mag S9Wmag ?=-99 AKARI S9W flux density from the
AKARI/IRC all-sky survey point source
catalog (2)
207- 214 F8.4 mag e_S9Wmag ?=-99 Error on S9Wmag
216- 223 F8.4 mag L18Wmag ?=-99 AKARI L18W flux density from the
AKARI/IRC all-sky survey point source
catalog (2)
225- 232 F8.4 mag e_L18Wmag ?=-99 Error on L18Wmag
234- 241 F8.4 mag N60mag ?=-99 AKARI N60 flux density from the
AKARI/FIS all-sky survey bright source
catalog (2)
243- 250 F8.4 mag e_N60mag ?=-99 Error on N60mag
252- 258 F7.4 mag WIDE-Smag AKARI WIDE-S flux density from the
AKARI/FIS all-sky survey bright source
catalog (2)
260- 265 F6.4 mag e_WIDE-Smag Error on WIDE-Smag
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Note (1): Values measured from the SED fitting by CIGALE
Note (2): The magnitudes are given in the AB system
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History:
From electronic version of the journal
(End) Ana Fiallos [CDS] 05-Jun-2023