J/A+A/651/A108 AGN catalog from the AKARI NEP Wide field (Poliszczuk+, 2021)
Active galactic nuclei catalog from the AKARI NEP Wide field.
Poliszczuk A., Pollo A., Malk K., Durkalec A., Pearson W.J., Goto T.,
Kim S.-J., Malkan M., Oi N., Ho S.C.-C., Shim H., Pearson C., Hwang H.-S.,
Toba Y., Kim E.
<Astron. Astrophys. 651, A108 (2021)>
=2021A&A...651A.108P 2021A&A...651A.108P (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei; Positional data; Photometry
Keywords: infrared: galaxies - galaxies: active - catalogs -
techniques: photometric - methods: data analysis
Abstract:
The North Ecliptic Pole (NEP) field provides a unique set of
panchromatic data, well suited for active galactic nuclei (AGN)
studies. Selection of AGN candidates is often based on mid-infrared
(MIR) measurements. Such method, despite its effectiveness, strongly
reduces a catalog volume due to the MIR detection condition. Modern
machine learning techniques can solve this problem by finding similar
selection criteria using only optical and near-infrared (NIR) data.
Aims of this work were to create a reliable AGN candidates catalog
from the NEP field using a combination of optical SUBARU/HSC and NIR
AKARI/IRC data and, consequently, to develop an efficient alternative
for the MIR-based AKARI/IRC selection technique.
A set of supervised machine learning algorithms was tested in order to
perform an efficient AGN selection. Best of the models were formed
into a majority voting scheme, which used the most popular
classification result to produce the final AGN catalog. Additional
analysis of catalog properties was performed in form of the spectral
energy distribution (SED) fitting via the CIGALE software.
The obtained catalog of 465 AGN candidates (out of 33119 objects) is
characterized by 73% purity and 64% completeness. This new
classification shows consistency with the MIR-based selection.
Moreover, 76% of the obtained catalog can be found only with the new
method due to the lack of MIR detection for most of the new AGN
candidates. Training data, codes and final catalog are available via
the github repository. Final AGN candidates catalog is also available
via the CDS service.
Description:
Table contains the final catalog of AGN candidates selected in the
AKARI NEP Wide field (465 objects). Positions, optical photometry from
SUBARU/HSC and near-IR and mid-IR photometry from AKARI/IRC are
provided.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 626 465 Catalog of AGN candidates (465 objects)
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See also:
J/PASJ/59/S529 : NEP deep survey at 11um (Lee+, 2007)
J/A+A/517/A54 : 20cm survey of the AKARI NEP (White+, 2010)
J/ApJS/190/166 : Optical catalog of AKARI NEP-wide survey (Jeon+, 2010)
J/A+A/537/A24 : AKARI NEP-Deep field mid-IR source catalogue (Takagi+, 2012)
J/A+A/548/A29 : IR source catalog of AKARI NEP-Wide field (Kim+, 2012)
J/A+A/559/A132 : AKARI NEP Deep Survey revised catalog (Murata+, 2013)
J/ApJS/207/37 : IR sources spectroscopy in the AKARI NEP (Shim+, 2013)
J/A+A/566/A60 : Optical-NIR catalog of AKARI NEP Deep Field (Oi+, 2014)
J/ApJS/214/20 : AKARI NEP field J- and H- band source catalog (Jeon+, 2014)
J/MNRAS/444/846 : AKARI NEP Survey sources at 18um (Pearson+, 2014)
J/MNRAS/446/911 : X-ray sources in the AKARI NEP deep field (Krumpe+, 2015)
J/A+A/645/A95 : NEP raster ROSAT X-ray/Optical catalog (Hasinger+, 2021)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 18 F18.14 deg RAdeg Right ascension (J2000)
20- 36 F17.14 deg DEdeg Declination (J2000)
38- 43 I6 --- AKR ID of the object in the AKARI database.
45- 61 I17 --- HSC ID of the object in the North Ecliptic Pole
SUBARU/HSC catalog (1)
63- 80 F18.15 mag gmag Brightness in g filter of SUBARU/HSC (AB)
82-101 F20.18 mag e_gmag gmag measurement uncertainty
103-120 F18.15 mag rmag Brightness in r filter of SUBARU/HSC (AB)
122-141 F20.18 mag e_rmag rmag measurement uncertainty
143-160 F18.15 mag imag Brightness in i filter of SUBARU/HSC (AB)
162-181 F20.18 mag e_imag imag measurement uncertainty
183-200 F18.15 mag zmag Brightness in z filter of SUBARU/HSC (AB)
202-221 F20.18 mag e_zmag zmag measurement uncertainty
223-240 F18.15 mag Ymag Brightness in Y filter of SUBARU/HSC (AB)
242-261 F20.18 mag e_Ymag Ymag measurement uncertainty
263-280 F18.15 mag N2mag Brightness in N2 filter of AKARI/IRC (AB)
282-301 F20.18 mag e_N2mag N2mag measurement uncertainty
303-320 F18.15 mag N3mag Brightness in N3 filter of AKARI/IRC (AB)
322-341 F20.18 mag e_N3mag N3mag measurement uncertainty
343-360 F18.15 mag N4mag Brightness in N4 filter of AKARI/IRC (AB)
362-381 F20.18 mag e_N4mag N4mag measurement uncertainty
383-400 F18.15 mag S7mag ? Brightness in S7 filter of AKARI/IRC (AB)
402-421 F20.18 mag e_S7mag ? S7mag measurement uncertainty
423-440 F18.15 mag S9mag ? Brightness in S9 filter of AKARI/IRC (AB)
442-461 F20.18 mag e_S9mag ? S9mag measurement uncertainty
463-480 F18.15 mag S11mag ? Brightness in S11 filter of AKARI/IRC (AB)
482-501 F20.18 mag e_S11mag ? S11mag measurement uncertainty
503-520 F18.15 mag L15mag ? Brightness in L15 filter of AKARI/IRC (AB)
522-541 F20.18 mag e_L15mag ? L15mag measurement uncertainty
543-560 F18.15 mag L18mag ? Brightness in L18 filter of AKARI/IRC (AB)
562-581 F20.18 mag e_L18mag ? L18mag measurement uncertainty
583-600 F18.15 mag L24mag ? Brightness in L24 filter of AKARI/IRC (AB)
602-621 F20.18 mag e_L24mag ? L24mag measurement uncertainty
623-624 I2 --- sumy [11/21] Sum of predictions from the voting
scheme (see paper for more information)
626 I1 --- ypred [0/1] Final classifier prediction (2)
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Note (1): North Ecliptic Pole SUBARU/HSC catalog ID
(Goto et al., 2017PKAS...32..225G 2017PKAS...32..225G, Oi et al., 2021MNRAS.500.5024O 2021MNRAS.500.5024O,
Kim et al., 2021MNRAS.500.4078K 2021MNRAS.500.4078K).
Note (2): Final classifier prediction (in the case of final AGN catalog all
are equal 1) as follows:
1 = AGN
0 = not AGN
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Acknowledgements:
Artem Poliszczuk, artem.poliszczuk(at)ncbj.gov.pl
References:
Goto et al., 2017PKAS...32..225G 2017PKAS...32..225G
Oi et al., 2021MNRAS.500.5024O 2021MNRAS.500.5024O
Kim et al., 2021MNRAS.500.4078K 2021MNRAS.500.4078K
(End) Patricia Vannier [CDS] 28-Apr-2021