J/MNRAS/536/3611 Broad-line AGN in 6dF Galaxy Survey (Hon+, 2025)
Broad-line Active Galactic Nuclei in the 6dF Galaxy Survey.
Hon WJ., Webster RL., Wolf C.
<Mon. Not. R. Astron. Soc. 536, 3611-3630 (2025)>
=2025MNRAS.536.3611H 2025MNRAS.536.3611H (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Galaxies, Seyfert ; Line Profiles ;
Galaxies, spectra ; Spectral types
Keywords: catalogues - galaxies: active - quasars: general - galaxies: Seyfert -
galaxies: statistics
Abstract:
The Six-degree Field Galaxy Survey (6dFGS) is a spectroscopic redshift
survey of the Southern hemisphere completed in 2006. While it provides
136,304 spectra of mostly low-redshift galaxies, a large and reliable
catalogue of Active Galactic Nuclei (AGN) that are selected based on
spectral signatures is still lacking. In this work, we present an
extensive list of verified broad emission-line AGN in the 6dFGS
sample. We visually confirm the AGN nature of all spectra, and
disentangle fibre cross-talk to remove bogus AGN. The final catalogue
contains 2,513 unique broad-line AGN with a median redshift of 0.207,
of which 891 are identified for the first time. A flux-limited
subsample contains 665 AGN to a K-band magnitude of 13. This new
sample adds to the list of known low-luminosity AGN in the Southern
hemisphere and thus provides a basis for investigations of
low-redshift AGN with the upcoming Vera C. Rubin Observatory.
Description:
A list of 6dFGS sources that are confirmed to be broad line AGN. Line
fitting measurements are provided for those with adequate. In
addition, an estimate to the line Hbeta and OIII line luminosity is
provided for sources with a good matching photometry from the
SkyMapper Southern Sky Survey.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
catalog.dat 808 2513 6df BEL AGN catalog
--------------------------------------------------------------------------------
See also:
VII/259 : 6dF galaxy survey final redshift release
II/379 : SkyMapper Southern Sky Survey. DR4
VII/294 : The Million Quasars (Milliquas) catalogue, version 8
(Flesch, 2023)
J/A+A/615/A167 : Catalog of NLS1s galaxies in 6dFGS survey (Chen+, 2018)
J/ApJ/872/134 : A uniformly selected all-sky optical AGN catalog (Zaw+, 2019)
J/ApJS/258/29 : Southern-sky optical AGN catalog from 6dFGS sp. (Chen+, 2022)
Byte-by-byte Description of file: catalog.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- Name 6dfgs unique source identifier
(gHHMMSSs+DDMMSS)
17- 29 F13.9 deg RAdeg Right Ascension (J2000)
31- 43 F13.9 deg DEdeg Declination (J2000)
45- 47 I3 --- ProgId [1/999] 6dfgs program id
49- 54 I6 --- SpecId 6dfgs unique spectrum id
56- 67 A12 --- dup spec_id for 6dfgs sources with duplicates
69- 78 F10.8 --- z Redshift
80- 87 F8.6 --- z6dfgs ? 6dfgs reported redshift
89- 94 A6 --- type AGN classification (1)
96-100 A5 --- extType Exist in other catalogue (2)
102-150 A49 --- Comments Brief description of notable issues
152-157 F6.2 --- SNR ?=0 Signal-to-noise (3)
159-168 I10 --- SMSS SkyMapper Southern Sky Survey (SMSS)
object id
170-175 F6.4 mag E(B-V) E(B-V)
177-189 F13.9 --- FAGN/Star ? Estimate of AGN:STAR flux
191-194 F4.2 --- Distdr4 Closest SMSS DR4 matching source
196 I1 --- Ngobj Number of GAIA objects within a 4 arcsec
198 I1 --- Ngstar Number of GAIA stars within a 4 arcsec
200-208 F9.6 mag gmag67 SMSS g-band 6.7arcsec constructed photometry
210-215 F6.4 mag e_gmag67 SMSS g-band 6.7arcsec constructed
photometry error
217-225 F9.6 mag rmag67 SMSS r-band 6.7arcsec constructed photometry
227-232 F6.4 mag e_rmag67 SMSS r-band 6.7arcsec constructed
photometry error
234-244 E11.6 mW/m2 Fg67 ?=0 SMSS g-band 6.7arcsec constructed
photometry flux
246-256 E11.6 mW/m2 Fr67 ?=0 SMSS r-band 6.7arcsec constructed
photometry flux
258-265 E8.3 mW/m2 FHbBest ?=0 Flux estimate of Hbeta BEL
267-274 E8.3 mW/m2 FO3est ?=0 Flux estimate of OIII5007
276-283 E8.3 mW/m2 e_FHbBest ?=0 Flux estimate of Hbeta BEL error
285-293 E9.3 mW/m2 e_FO3est ?=0 Flux estimate of OIII5007 error
295-302 E8.3 mW/m2 F0HbBest ?=0 Dereddened flux of Hbeta BEL
304-311 E8.3 mW/m2 F0O3est ?=0 Dereddened flux of OIII5007
313-317 F5.2 [10-7W] logLHbB ?=0 Log luminosity of Hbeta BEL
319-323 F5.2 [10-7W] logLO3 ?=0 Log luminosity of OIII5007
325-328 F4.2 [10-7W] e_logLHbB ?=0 Log luminosity of Hbeta BEL error
330-336 F7.2 [10-7W] e_logLO3 ?=0 Log luminosity of OIII5007 error
338-345 E8.3 mW/m2 FMgest ?=0 Flux estimate of MgII
347-354 E8.3 mW/m2 e_FMgest ?=0 Flux estimate of MgII error
356-363 E8.3 mW/m2 F0Mgest ?=0 Dereddened flux of MgII
365-369 F5.2 [10-7W] logLMg ?=0 Log luminosity of MgII (1x10-7 Watts)
371-374 F4.2 [10-7W] e_logLMg ?=0 Log luminosity of MgII error
376-382 F7.2 --- RHbB/O3 ?=0 Ratio of Hbeta BEL flux to OIII5007
384-391 F8.2 km/s FWHMHbB ?=0 FWHM of Hbeta BEL
393-399 F7.2 km/s e_FWHMHbB ?=0 FWHM of Hbeta BEL error
401-407 F7.2 --- SkewHbB ?=0 Skew of Hbeta BEL
409-415 F7.2 --- e_SkewHbB ?=0 Skew of Hbeta BEL error
417-423 F7.2 0.1nm PeakHbB ?=0 Peak wavelength of Hbeta BEL
425-429 F5.2 0.1nm e_PeakHbB ?=0 Peak wavelength of Hbeta BEL error
431-436 F6.2 --- EWHbB ?=0 Equivalent Width of Hbeta BEL
438-442 F5.2 --- e_EWHbB ?=0 Equivalent Width of Hbeta BEL error
444-449 F6.2 km/s FWHMHbN ?=0 FWHM of Hbeta NEL
451-457 F7.2 km/s e_FWHMHbN ?=0 FWHM of Hbeta NEL error
459-465 F7.2 0.1nm PeakHbN ?=0 Peak wavelength of Hbeta NEL
467-473 F7.2 0.1nm e_PeakHbN ?=0 Peak wavelength of Hbeta NEL error
475-479 F5.2 --- EWHbN ?=0 Equivalent Width of Hbeta NEL
481-487 F7.2 --- e_EWHbN ?=0 Equivalent Width of Hbeta NEL error
489-495 F7.2 km/s FWHMO3 ?=0 FWHM of OIII5007
497-503 F7.2 km/s e_FWHMO3 ?=0 FWHM of OIII5007 error
505-511 F7.2 0.1nm PeakO3 ?=0 Peak wavelength of OIII5007
513-519 F7.2 0.1nm e_PeakO3 ?=0 Peak wavelength of OIII5007 error
521-526 F6.2 --- EWO3 ?=0 Equivalent width of OIII5007
528-534 F7.2 --- e_EWO3 ?=0 Equivalent width of OIII5007 error
536-543 F8.2 km/s FWHMHaB ?=0 FWHM of Halpha BEL
545-551 F7.2 km/s e_FWHMHaB ?=0 FWHM of Halpha BEL error
553-559 F7.2 --- SkewHaB ?=0 Skew of Halpha BEL
561-567 F7.2 --- e_SkewHaB ?=0 Skew of Halpha BEL error
569-575 F7.2 0.1nm PeakHaB ?=0 Peak wavelength of Halpha BEL
577-583 F7.2 0.1nm e_PeakHaB ?=0 Peak wavelength of Halpha BEL error
585-590 F6.2 --- EWHaB ?=0 Equivalent width of Halpha BEL
592-597 F6.2 --- e_EWHaB ?=0 Equivalent width of Halpha BEL error
599-604 F6.2 km/s FWHMHaN ?=0 FWHM of Halpha NEL
606-612 F7.2 km/s e_FWHMHaN ?=0 FWHM of Halpha NEL error
614-620 F7.2 0.1nm PeakHaN ?=0 Peak wavelength of Halpha NEL
622-628 F7.2 0.1nm e_PeakHaN ?=0 Peak wavelength of Halpha NEL error
630-634 F5.2 --- EWHaN ?=0 Equivalent width of Halpha NEL
636-642 F7.2 --- e_EWHaN ?=0 Equivalent width of Halpha NEL error
644-651 F8.2 km/s FWHMMg ?=0 FWHM of MgII
653-659 F7.2 km/s e_FWHMMg ?=0 FWHM of MgII error
661-665 F5.2 --- SkewMg ?=0 Skew of MgII
667-670 F4.2 --- e_SkewMg ?=0 Skew of MgII error
672-678 F7.2 0.1nm PeakMg ?=0 Peak wavelength of MgII
680-684 F5.2 0.1nm e_PeakMg ?=0 Peak wavelength of MgII error
686-691 F6.2 --- EWMg ?=0 Equivalent width of MgII
693-698 F6.2 --- e_EWMg ?=0 Equivalent width of MgII error
700-715 A16 --- 2MASS 2MASS unique source identifier
717-722 F6.3 mag Jmag ?=- 2MASS J-band point source magnitude
724-729 F6.3 mag e_Jmag ?=- 2MASS J-band point source magnitude
error
731-736 F6.3 mag Hmag ?=- 2MASS H-band point source magnitude
738-743 F6.3 mag e_Hmag ?=- 2MASS H-band point source magnitude
error
745-750 F6.3 mag Kmag ?=- 2MASS K-band point source magnitude
752-757 F6.3 mag e_Kmag ?=- 2MASS K-band point source magnitude
error
759-764 F6.3 mag Jmagext ?=- 2MASS J-band extended source magnitude
766-770 F5.3 mag e_Jmagext ?=- 2MASS J-band extended source magnitude
error
772-777 F6.3 mag Hmagext ?=- 2MASS H-band extended source magnitude
779-783 F5.3 mag e_Hmagext ?=- 2MASS H-band extended source magnitude
error
785-790 F6.3 mag Kmagext ?=- 2MASS K-band extended source magnitude
792-796 F5.3 mag e_Kmagext ?=- 2MASS K-band extended source magnitude
error
798-802 F5.2 mag bjmag ? UKST bj magnitude
804-808 F5.2 mag rfmag ? UKST rf magnitude
--------------------------------------------------------------------------------
Note (1): AGN1.0 to AGN1.9 = Seyfer ttype classification Type-1.0 to Type-1.9
as quantified by Winkler, H . (1992MNRAS.257..677W 1992MNRAS.257..677W)
QSOMg = Spectra with dominant MgII
QSOhiz = Quasar spectra hat are noted, but not line fit
Note (2): Other catalogues as follows:
MQAGN = The Million Quasar (Milliquas) Catalogue v8
(2023yCat.7294....0F 2023yCat.7294....0F, Cat. VII/294)
CHEN = Catalog of NLS1s galaxies in 6dFGS survey
(2018A&A...615A.167C 2018A&A...615A.167C, Cat. J/A+A/615/A167)
2MAGN = A Uniformly Selected, All-sky, Optical AGN Catalog
(2019ApJ...872..134Z 2019ApJ...872..134Z, Cat. J/ApJ/872/134)
6dAGN = A Uniformly Selected, Southern-sky 6dF, Optical AGN Catalog
(2022ApJS..258...29C 2022ApJS..258...29C, Cat. J/ApJS/258/29)
Note (3): For z<0.5, SNR measured a round 4700Å or 5100Å rest wavelength.
For QSOMg, SNR measured around 2500Å or 3000Å rest wavelength.
Provided is the value that is available, or if both are available,
the average of the two.
--------------------------------------------------------------------------------
Acknowledgements:
Wei Jeat Hon, whon(at)student.unimelb.edu.au
(End) Patricia Vannier [CDS] 02-Jan-2025