J/A+A/670/A171 Second release of the Turin-SyCAT catalog (Kosiba+, 2023)
A multifrequency characterization of the extragalactic hard X-ray sky.
Presenting the second release of the Turin-SyCAT.
Kosiba M., Pena-Herazo H.A., Massaro F., Masetti N., Paggi A.,
Chavushyan V., Bottacini E., Werner N.
<Astron. Astrophys. 670, A171 (2023)>
=2023A&A...670A.171K 2023A&A...670A.171K (SIMBAD/NED BibCode)
ADC_Keywords: Galaxy catalogs ; X-ray sources ; Redshifts ; Infrared sources
Keywords: catalogs - methods: data analysis - X-rays: general
Abstract:
Nowadays we know that the origin of the Cosmic X-ray Background (CXB)
is due to the integrated emission of nearby active galactic nuclei.
Thus, to obtain a precise estimate of the contribution of different
source classes to the CXB it is crucial to fully characterize the hard
X-ray sky. We present a multifrequency analysis of all sources listed
in the 3d release of the Palermo Swift-BAT hard X-ray catalog (3PBC)
with the goal of (i) identifying and classifying the largest number of
sources adopting multifrequency criteria, with particular emphasis on
extragalactic populations and (ii) extracting Seyfert galaxies to
present here the 2nd release of the Turin-SyCAT catalog. We outline a
classification scheme based on radio, infrared and optical criteria
that allows us to distinguish between unidentified and unclassified
hard X-ray sources, and classify and classify the remaining ones
discriminating between Galactic and extragalactic classes. Our revised
version of the 3PBC lists 1176 classified, 820 extragalactic, and 356
Galactic, 199 unclassified, and 218 unidentified sources. According to
our analysis, the hard X-ray sky is mainly populated by Seyfert
galaxies and blazars. For the Seyfert galaxies, we present the 2nd
release of the Turin-SyCAT including a total of 633 Seyfert galaxies,
with 282 new sources, which is an 80% increment from the previous
release. We confirm, that there is no clear difference between the
flux distribution of the infrared-to-hard X-ray flux ratio of Seyfert
galaxies Type 1 and Type 2. However, we confirm a significant trend
between the mid-IR flux and hard X-ray flux.
Description:
We focus on the analysis of the 3PBC catalog (Cusumano et al.,
2010A&A...524A..64C 2010A&A...524A..64C, Cat. J/A+A/524/A64), in particular focusing on
the extragalactic source population, aiming also at discovering new
Seyfert galaxies that can be included in the presented Turin-SyCAT 2nd
release. The 3PBC provides 1593 sources above signal to noise ratio of
3.8, approximately 57% sources appear to have a clear extragalactic
origin while 19% belong to our Milky Way, and the remaining 24% are
yet unknown. Results of our multifrequency investigation are also
based on those recently found for the 105 month Swift-BAT catalogue
(Oh et al., 2018ApJS..235....4O 2018ApJS..235....4O, Cat. J/ApJS/235/4) and the INTEGRAL
IBIS hard X-ray survey in energy range 17-100 keV (Bird et al.,
2016ApJS..223...15B 2016ApJS..223...15B, Cat. J/ApJS/223/15).
The final revised 3PBC catalog we present in this study lists 1176
classified, 820 extragalactic, and 356 Galactic ones, 218 unidentified
and 199 unclassified sources, respectively. The original version of
the 3PBC catalog listed 244 unidentified and 362 unclassified sources
counted according to our classification scheme (see Appendix for more
details). We improved the fraction of 15.3% unidentified sources to
13.7% (from 244 to 218 sources) and the fraction of 22.7% unclassified
sources to 12.5% (from 362 to 199 sources). It is important to
highlight that 98 sources were classified in the original 3PBC
catalog, but they were indeed listed as unclassified according to our
refined analysis since they lacked multifrequency information.
In the presented 2nd release of the Turin-SyCAT, we list 633 Seyfert
galaxies, 282 new ones added here thus correspondent to increase their
number by ∼80% with respect to its 1st release.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table5.dat 170 1593 Our revised version of the 3PBC catalogue
table6.dat 167 633 Second version of the Turin-SyCat catalog
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See also:
II/311 : WISE All-Sky Data Release (Cutri+ 2012)
J/A+A/524/A64 : The 54-month Palermo BAT-survey catalogue (Cusumano+, 2010)
J/ApJS/223/15 : 8yr INTEGRAL/IBIS soft gamma-ray source obs. (Bird+, 2016)
J/ApJS/235/4 : The 105-month Swift-BAT all-sky hard X-ray survey (Oh+, 2018)
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 17 A17 --- 3PBC Source name of each object as reported in the
original Third Palermo BAT catalog
(3PBC JHHMM.M+DDMM) (1)
19- 28 F10.6 deg RAdeg Right Ascension (J2000) of the 3PBC source
as reported in the original catalog
30- 38 F9.5 deg DEdeg Declination (J2000) of the 3PBC source
as reported in the original catalog
40- 67 A28 --- Ctp Name of counterpart of the 3PBC source
assigned in the paper
69- 87 F19.15 deg RACdeg ?=0 Right Ascension (J2000) of the associated
counterpart (radio, infrared or
optical position)
89-108 F20.16 deg DECdeg ?=0 Declination (J2000) of the associated
counterpart (radio, infrared or
optical position)
110-130 F21.19 --- z ?=0 Counterpart's redshift, if the counterpart
is an extragalactic source
132-138 A7 --- Class Class assigned according to the classification
scheme presented in the paper
140-150 A11 --- Subclass Subclass assigned according to the
classification scheme presented in the paper
152-170 A19 --- WISE Name of the counterpart, if associated with a
mid-infrared source, as reported in the
WISE all-sky survey (JHHMMSS.ss+DDMMSS.s)
--------------------------------------------------------------------------------
Note (1): 3PBC : http://bat.ifc.inaf.it/bat_catalog_web/66m_bat_catalog.html
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Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- ID2 Unique catalog identifier adopted in the 2nd
release of the Turin-SyCAT presented in
the paper
5- 7 I3 --- ID1 ? Unique catalog identifier used in the
1st release of the Turin-SyCAT
9- 22 A14 --- SyCAT Source name assigned adopting the SyCAT
nomenclature (SYN JHHMM+DDMM)
24- 43 F20.16 deg RAdeg Right Ascension (J2000) of the SyCAT source
(radio, infrared or optical position)
45- 66 F22.18 deg DEdeg Declination (J2000) of the SyCAT source
(radio, infrared or optical position)
68- 88 F21.19 --- z Source redshift.
90-108 A19 --- WISE Name of the counterpart, if associated with a
mid-infrared source, as reported in the
WISE all-sky survey (JHHMMSS.ss+DDMMSS.s)
110-126 A17 --- 3PB Name of the counterpart, if associated with an
hard X-ray source, as reported in the 3PBC
(3PBC JHHMM.s+DDMM)
128-149 E22.17 mW/m2 FX ? Hard X-ray flux in the 15-150keV band as
reported in the 3PBC catalog
(in erg/cm2/s unit)
151-155 A5 --- in3PBC [true false] Flag indicating whether the
object belongs to 3PBC catalog.
157-161 A5 --- inBAT105 [true false] Flag indicating whether the
object belongs to Swift BAT 105-Month
Hard X-ray Survey (1)
163-167 A5 --- SyCATv2 [true false] Flag indicating whether the
object was added in 2nd release of the
Turin-SyCAT
--------------------------------------------------------------------------------
Note (1): BAT105 : swift.gsfc.nasa.gov/results/bs105mon/
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Acknowledgements:
Matej Kosiba, matej.kosiba(a)gmail.com
(End) Patricia Vannier [CDS] 25-Nov-2022