AGN_SDSS
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2005MNRAS.362....9Best+
J/MNRAS/362/9 Radio-loud AGN in SDSS (Best+, 2005)
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A sample of radio-loud active galactic nuclei in the Sloan Digital Sky Survey.
Best P.N., Kauffmann G., Heckman T.M., Ivezic Z.
=2005MNRAS.362....9B
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ADC_Keywords: Surveys ; Galaxies, radio ; Active gal. nuclei ; Redshifts
Keywords: surveys - galaxies: active - galaxies: evolution -
galaxies: luminosity function, mass function - galaxies: starburst -
radio continuum: galaxies
Abstract:
A sample of 2712 radio-luminous galaxies is defined from the second
data release of the Sloan Digital Sky Survey (SDSS) by cross-comparing
the main spectroscopic galaxy sample with two radio surveys: the
National Radio Astronomy Observatories (NRAO) Very Large Array (VLA)
Sky Survey (NVSS, ) and the Faint Images of the Radio Sky at
Twenty centimeters (FIRST, ) survey. The comparison is
carried out in a multistage process and makes optimal use of both
radio surveys by exploiting the sensitivity of the NVSS to extended
and multicomponent radio sources in addition to the high angular
resolution of the FIRST images. A radio source sample with 95 per cent
completeness and 98.9% reliability is achieved, far better than would
be possible for this sample if only one of the surveys was used. The
radio source sample is then divided into two classes: radio-loud
active galactic nuclei (AGN) and galaxies in which the radio emission
is dominated by star formation. The division is based on the location
of a galaxy in the plane of 4000{AA} break strength versus radio
luminosity per unit stellar mass and provides a sample of 2215
radio-loud AGN and 497 star-forming galaxies brighter than 5mJy at
1.4GHz. A full catalogue of positions and radio properties is provided
for these sources.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 84 2712 Properties of the 2712 SDSS radio galaxies
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See also:
II/259 : The SDSS Photometric Catalog, Release 3 (Abazajian+ 2005)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
VIII/71 : The FIRST Survey Catalog, Version 03Apr11 (Becker+ 2003)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- IDPlate Plate identification number (from SDSS)
6- 12 I7 d JD Julian Date of observation (from SDSS)
14- 16 I3 --- IDFibre Fibre identification number (from SDSS)
18- 26 F9.5 deg RAdeg Right ascension in decimal degrees (J2000)
28- 35 F8.4 deg DEdeg Declination in decimal degrees (J2000)
37- 42 F6.4 --- z Redshift
44- 49 F6.4 Jy SNVSS NVSS () 1.4GHz integrated flux
density of the source
51 I1 --- Cl Radio class (1)
53- 58 F6.4 Jy SFIRST ?=- FIRST () 1.4GHz integrated flux
density of the central FIRST component (2)
60- 63 F4.2 arcsec Offset ?=- Offset from the optical galaxy of
the central FIRST component (2)
65- 69 F5.2 arcsec Size ?=- Radio size of the central FIRST
component (2)
71- 84 A14 --- Type Classification of the source
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Note (1): Radio classes as follows:
1 = single-component NVSS sources with a single FIRST match
2 = single-component NVSS sources resolved into multiple
components by FIRST
3 = single-component NVSS source without a FIRST counterpart
4 = sources are those which have multiple NVSS components
Note (2): Where a galaxy has a central FIRST () component, the
integrated flux density, offset from the optical galaxy, and
radio size of that central FIRST component are given.
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Acknowledgements:
Philip Best, pnb(at)roe.ac.uk
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(End) Patricia Vannier [CDS] 19-Apr-2006
J/MNRAS/421/1569 Properties of 18286 SDSS radio galaxies (Best+, 2012)
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2012MNRAS.421.1569Best On the fundamental dichotomy in the local radio-AGN population:
accretion, evolution and host galaxy properties.
Best P.N., Heckman T.M.
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ADC_Keywords: Galaxies, radio ; Redshifts
Keywords: accretion, accretion discs - black hole physics - galaxies: active -
galaxies: jets - radio continuum: galaxies
Abstract:
A sample of 18286 radio-loud active galactic nuclei (AGN) is
presented, constructed by combining the seventh data release of the
Sloan Digital Sky Survey with the NRAO (National Radio Astronomy
Observatory) VLA (Very Large Array) Sky Survey (NVSS) and the Faint
Images of the Radio Sky at Twenty centimetres (FIRST) survey. Using
this sample, the differences between radio galaxies of
"high-excitation" ("quasar-mode"; hereafter HERG) and
"low-excitation" ("radio-mode"; LERG) are investigated.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 99 18286 Properties of the 18286 SDSS radio galaxies
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See also:
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
VIII/90 : The FIRST Survey Catalog, Version 12Feb16 (Becker+ 2012)
http://www.sdss.org : SDSS Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Plate SDSS Plate number
7- 11 I5 --- MJD SDSS MJD number
14- 16 I3 --- Fiber SDSS Fiber number
19- 28 F10.7 h RAhour Right ascension (J2000)
31- 39 F9.5 deg DEdeg Declination (J2000)
43- 49 F7.5 --- z [0.01/0.70] Redshift
53- 59 F7.4 Jy SNVSS NVSS 1.4GHz integrated flux density
63 I1 --- RCl Radio class (1)
67- 73 F7.4 Jy SFIRST ?=0 FIRST 1.4GHz integrated flux density
79- 83 F5.2 arcsec Offset ?=-1.00 Offset from the optical galaxy of
FIRST component
87 I1 --- A [0/1] 1 = radio-loud AGN,
0 = star-forming galaxy
91 I1 --- M [0/1] 1 = source included in full statistical
'main sample'
95 I1 --- L [0/1] 1 = radio-loud AGN classified as
low-excitation radio mode (LERG)
99 I1 --- H [0/1] 1 = radio-loud AGN classified
as high-excitation radio mode (HERG)
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Note (1): Radio class as follows:
1 = single-component NVSS sources with a single FIRST match
2 = single-component NVSS sources resolved into multiple components by FIRST
3 = single-component NVSS sources without a FIRST counterpart
4 = sources are those which have multiple NVSS components
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History:
From electronic version of the journal
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(End) Patricia Vannier [CDS] 16-Nov-2012