ACDS V10.0 - Fri Sep 01 07:35:48 CEST 2023
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Detailed Description of J/ApJS/234/23 :
The WISE AGN candidates catalogs (Assef+, 2018)
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Note : this is the description file of the original catalog.
This HTML page corresponds well to the original description, but some minor
changes in the format may have been introduced in the FITS output
files in order to allow for arithmetic operations on quantities
such as coordinates and times. h:m:s and d:m:s units are normally
converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the
units; the value given in the HTML files supersedes the value indicated in the ReadMe
file for this catalogue.
J/ApJS/234/23 The WISE AGN candidates catalogs (Assef+, 2018)
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The WISE AGN catalog.
Assef R.J., Stern D., Noirot G., Jun H.D., Cutri R.M., Eisenhardt P.R.M.
<Astrophys. J. Suppl. Ser., 234, 23-23 (2018)>
=2018ApJS..234...23A (SIMBAD/NED BibCode)
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ADC_Keywords: Photometry, infrared ; Active gal. nuclei
Keywords: galaxies: active; infrared: general; quasars: general
Abstract:
We present two large catalogs of active galactic nucleus (AGN)
candidates identified across 30,093deg2 of extragalactic sky from
the Wide-field Infrared Survey Explorer's AllWISE Data Release. Both
catalogs are selected purely using the Wide-field Infrared Survey
Explorer (WISE) W1 and W2 bands. The R90 catalog consists of 4,543,530
AGN candidates with 90% reliability, while the C75 catalog consists of
20,907,127 AGN candidates with 75% completeness. These reliability and
completeness figures were determined from a detailed analysis of UV-
to near-IR spectral energy distributions of ~105 sources in the
9deg2 Bootes field. The AGN selection criteria are based on those of
Assef+ (2013, J/ApJ/772/26) recalibrated to the AllWISE data release.
We provide a detailed discussion of potential artifacts and excise
portions of the sky close to the Galactic Center, Galactic Plane,
nearby galaxies, and other expected contaminating sources. These
catalogs are expected to enable a broad range of science, and we
present a few illustrative cases. From the R90 sample, we identify 45
highly variable AGNs lacking radio counterparts in the FIRST survey.
One of these sources, WISEA J142846.71+172353.1, is a changing-look
quasar at z=0.104, which has changed from having broad H{alpha} to
being a narrow-lined AGN. We characterize our catalogs by comparing
them to large, wide-area AGN catalogs in the literature. We identify
four ROSAT X-ray sources that are each matched to three WISE-selected
AGNs in the R90 sample within 30". Spectroscopy reveals that one of
these systems, 2RXS J150158.6+691029, consists of a triplet of quasars
at z=1.133±0.004, suggestive of a rich group or forming galaxy
cluster.
File Summary:
FileName Lrecl Records Explanations
× 80 . This file
× ReadMe 80 . This file
× r90cat.dat 106 4543530 R90 final AGN candidates catalog (table 1)
× c75cat.dat 106 20907127 C75 final AGN candidates catalog (table 2)
× r90ex.dat 106 20645 R90 catalog of extended sources (table 7)
× c75ex.dat 106 26331 C75 catalog of extended sources (table 8)
Description of file: Original FITS files for R90 (AGN candidates
with 90% reliability) and C75 (AGN candidates with 75% completeness) final
and extended catalogs are available in the FTP section.
See also:
VII/7 : Lynds' Catalogue of Dark Nebulae (LDN) (Lynds 1962)
VII/9 : Lynds' Catalogue of Bright Nebulae (Lynds 1965)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
II/311 : WISE All-Sky Data Release (Cutri+ 2012)
II/328 : AllWISE Data Release (Cutri+ 2013)
V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)
VII/279 : SDSS quasar catalog: twelfth data release (Paris+, 2017)
J/A+AS/70/95 : Warm IRAS sources. I. AGN candidates (de Grijp+ 1987)
J/AJ/131/666 : Double-lobed radio quasars from the SDSS (de Vries+, 2006)
J/AJ/133/186 : Opt. spectroscopy of 77 luminous AGNs and QSOs (Lacy+, 2007)
J/ApJ/684/905 : z>1 gal. clusters from IRAC Shallow Survey (Eisenhardt+, 2008)
J/ApJ/701/428 : The Spitzer Deep, Wide-Field Survey (SDWFS) (Ashby+, 2009)
J/ApJ/696/870 : Catalina Real-time Transient Survey (CRTS) (Drake+, 2009)
J/ApJS/185/433 : SWIRE/Chandra survey in Lockman Hole Field (Wilkes+, 2009)
J/ApJ/713/970 : Low-resolution SED templates for AGNs & gal. (Assef+, 2010)
J/ApJ/708/584 : SEXSI Spitzer catalog (Eckart+, 2010)
J/ApJ/751/52 : AGN cand. from the WISE, 2MASS, RASS (W2R) (Edelson+, 2012)
J/ApJS/200/8 : AGES: the AGN and Galaxy Evolution Survey (Kochanek+, 2012)
J/ApJS/199/3 : The quasars MMT-BOSS pilot survey (Ross+, 2012)
J/AJ/144/49 : Quasars from SDSS-DR7, WISE and UKIDSS surveys (Wu+, 2012)
J/ApJ/772/26 : AGN with WISE. II. The NDWFS Bootes field (Assef+, 2013)
J/AJ/145/101 : Updated nearby galaxy catalog (Karachentsev+, 2013)
J/ApJS/208/24 : Spitzer MIR AGN survey. I. (Lacy+, 2013)
J/MNRAS/438/1149 : WISE data for radio-loud AGN samples (Gurkan+, 2014)
J/ApJS/212/1 : The WISE catalog of Galactic HII regions (Anderson+, 2014)
J/ApJ/790/54 : AGN models according to a UV to Mid-IR study (Chung+, 2014)
J/ApJ/792/30 : NEOWISE magnitudes for near-Earth objects (Mainzer+, 2014)
J/ApJS/221/12 : AGNs in the MIR using AllWISE data (Secrest+, 2015)
J/A+A/588/A103 : 2nd ROSAT all-sky survey (2RXS) source catalog (Boller+, 2016)
J/MNRAS/473/4937 : AllWISE xid for ROSAT/2RXS & XMMSLEW2 (Salvato+, 2018)
http://www.sao.ru/lv/lvgdb/ : Online catalog of the Local Volume galaxies
Byte-by-byte Description of file: *.dat
Bytes Format Units Label Explanations
1- 19 A19 --- WISEA AllWISE designation (JHHMMSS.ss+DDMMSS.s)
21- 31 F11.7 deg RAdeg Right ascension (J2000)
33- 43 F11.7 deg DEdeg Declination (J2000)
45- 50 F6.3 mag W1mag [8/21.7] WISE W1 (3.4um) magnitude
52- 57 F6.3 mag e_W1mag [0.01/0.6]?=- W1mag uncertainty
59- 64 F6.3 mag W2mag [7/17.7] WISE W2 (4.2um) magnitude
66- 71 F6.3 mag e_W2mag [0.008/0.3] W2mag uncertainty
73- 78 F6.3 mag W3mag [1.2/17.3]?=- WISE W3 (12um) magnitude
80- 85 F6.3 mag e_W3mag [0.006/0.6]?=- W3mag uncertainty
87- 92 F6.3 mag W4mag [-3.2/10.5]?=- WISE W4 (22um) magnitude
94- 99 F6.3 mag e_W4mag [0.003/0.6]?=- W4mag uncertainty
101 I1 --- MS [0/1] Moon-SAA flag (1)
103-106 I4 deg-2 SigPix [5/2497]? {Sigma}pix value;
only for the final catalogs (2)
Note (1): We strongly caution the user when considering faint sources near the
south Atlantic anomaly (SAA) in fields with high Moon background. To aid in
identifying possibly problematic sources, we have added a MOON_SAA flag to
the catalog, which is equal to 1 if the source is at a declination between
-15° and -45°, consistent with the SAA latitude, has a moon_lev flag
in W2 equal or greater to 3, and W2 S/N<=7.
See section 3.3.2. for further explanations.
Note (2): We find a number of spurious sources associated with residuals left
by solar system planets in the co-added WISE data.
We include for each source in the final R90 and C75 catalogs the
surface density of the HEALPix pixel that contains it ({Sigma}pix)
so the user can decide how to best deal with the artifacts described
in section 3.3.4.
History:
From electronic version of the journal (FITS files)
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(End) Emmanuelle Perret [CDS] 19-Mar-2018