J/AJ/133/1780 GALEX/SDSS quasar catalog (Trammell+, 2007)
The UV properties of SDSS-selected quasars.
Trammell G.B., Vanden Berk D.E., Schneider D.P., Richards G.T., Hall P.B.,
Anderson S.F., Brinkmann J.
<Astron. J., 133, 1780-1794 (2007)>
=2007AJ....133.1780T 2007AJ....133.1780T
ADC_Keywords: Surveys ; QSOs ; Ultraviolet ; Photometry, SDSS
Keywords: catalogs - surveys - galaxies: active - quasars: general -
ultraviolet: galaxies
Abstract:
We present an analysis of the broadband UV and optical properties of
z~<3.4 quasars matched in the Galaxy Evolution Explorer (GALEX)
General Data Release 1 (GR1) and the Sloan Digital Sky Survey (SDSS)
Data Release 3 (DR3). Of the 6371 SDSS DR3 quasars covered by 204
GALEX GR1 tiles, 5380 (84%) have near-UV detections, while 3034 (48%)
have both near-UV and far-UV detections using a matching radius of 7".
Most of the DR3 sample quasars are detected in the near-UV until
z∼1.7, with the near-UV detection fraction dropping to ∼50% by z∼2.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 303 6371 GALEX GR1 matches to SDSS DR3 Quasars
table5.dat 24 63 Table for median SED
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See also:
II/259 : The SDSS Photometric Catalog, Release 3 (Abazajian+ 2005)
J/AJ/130/825 : GALEX ultraviolet variability catalog (Welsh+, 2005)
J/ApJS/173/185 : GALEX ultraviolet atlas of nearby galaxies (Gil de Paz+, 2007)
http://galex.stsci.edu/GR1 : GALEX GR1 Home Page
http://www.sdss.org : SDSS Home Page
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- SDSS SDSS DR3 Quasar Catalog object designation (1)
20- 38 A19 --- GALEX ? GALEX GR1 merged object catalog
designation (2)
40- 49 F10.6 deg RAdeg SDSS Right Ascension
in decimal degrees (J2000.0)
51- 60 F10.6 deg DEdeg SDSS Declination in decimal degrees (J2000.0)
62- 72 F11.6 deg RAGdeg ?=-999.000000 GALEX Right Ascension (J2000)
74- 84 F11.6 deg DEGdeg ?=-999.000000 GALEX Declination (J2000)
86- 92 F7.2 arcsec Off ?=-999.00 GALEX/SDSS coordinate position
offset (3)
94- 99 F6.4 --- z SDSS derived redshift
101-106 F6.3 mag umag SDSS PSF u band magnitude (4)
108-112 F5.3 mag e_umag Error in umag
114-119 F6.3 mag gmag SDSS PSF g band magnitude (4)
121-125 F5.3 mag e_gmag Error in gmag
127-132 F6.3 mag rmag SDSS PSF r band magnitude (4)
134-138 F5.3 mag e_rmag Error in rmag
140-145 F6.3 mag imag SDSS PSF i band magnitude (4)
147-151 F5.3 mag e_imag Error in imag
153-158 F6.3 mag zmag SDSS PSF z band magnitude (4)
160-164 F5.3 mag e_zmag Error in zmag
166-173 F8.3 mag fmag ?=-999. GALEX f (FUV=120-177nm) magnitude (5)
175-182 F8.3 mag e_fmag ?=-999. Error in GR1 object catalog fmag
184-191 F8.3 mag efmag ?=-999. Empirical calibration error in fmag
193-200 F8.3 mag nmag ?=-999. GALEX n (NUV=177-300nm) magnitude (5)
202-209 F8.3 mag e_nmag ?=-999. Error in GR1 object catalog nmag
211-218 F8.3 mag enmag ?=-999. Empirical calibration error in nmag
220-224 F5.3 mag Au Galactic absorption in the SDSS u band (6)
226-231 F6.3 [cm-2] logNH Logarithmic Galactic HI column density
233-239 F7.3 mag iMAG Absolute SDSS i band magnitude (7)
241-248 F8.3 [10-7W] L2200 ?=-999.000 Log of monochromatic luminosity
at 2200Å (8)
250-257 F8.3 [10-7W] L5100 ?=-999.000 Log of monochromatic luminosity
at 5100Å (8)
259-264 F6.3 mag d(g-i) Relative (g-i) color index (9)
266-273 F8.3 mag d(f-n) ?=-999.000 Relative (f-n) color index (10)
275-281 F7.5 deg Dist Object distance from GALEX field center
283-291 E9.3 s Nexp GALEX NUV effective exposure time (11)
293-301 E9.3 s Fexp GALEX FUV effective exposure time (11)
303 I1 --- S GALEX survey identifier (12)
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Note (1): In hhmmss.ss+ddmmss.s (J2000.0) format.
Note (2): A blank indicates no detection.
Note (3): A -999 entry if there is no match within 7".
Note (4): Not corrected for Galactic extinction and given in AB-magnitudes.
From BEST processing if available.
Note (5): Not corrected for Galactic absorption and given in AB-magnitudes.
A -999 entry indicates no detection.
Note (6): Where Af, An, Ag, Ar, Ai, Az = 1.584, 1.692, 0.736, 0.534, 0.405,
0.287xAu.
Note (7): Where H0=70km/s/Mpc, OmegaM=0.30, OmegaL=0.70, and
alphaQ=-0.50).
Note (8): Rest-frame and in units of erg/s. A -999 entry indicates no value.
Note (9): Corrected for Galactic absorption using the absorption maps
of Schlegel et al. (1998ApJ...500..525S 1998ApJ...500..525S).
Note (10): A -999 entry unless there is a detection in both f,n bands.
Note (11): If there is no detection in either or both band(s), nexp, fexp,
and Survey are drawn from the deepest (highest texp) tile
that covered the quasar.
Note (12): GALEX survey identifier as follows:
4 = AIS, All-Sky Imaging Survey
3 = NGS, Nearby Galaxy Survey
2 = MIS, Medium Imaging Survey
1 = DIS, Deep Imaging Survey
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 5 F5.3 [0.1nm] logW Logarithmic rest frame wavelength in Angstroms
7- 12 F6.3 [Hz] logf Logarithmic rest frame frequency
14- 18 F5.3 --- RFlux Flux relative to 2200 Angstroms flux
20- 24 F5.3 --- e_RFlux The rms uncertainty in RFlux
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 03-May-2009