VII/243 SDSS quasar catalog. III. (Schneider+, 2005)
The Sloan Digital Sky Survey quasar catalog. III. Third data release.
Schneider D.P., Hall P.B., Richards G.T., Vanden Berk D.E., Anderson S.F.,
Fan X., Jester S., Stoughton C., Strauss M.A., Subbarao M., Brandt W.N.,
Gunn J.E., Yanny B., Bahcall N.A., Barentine J.C., Blanton M.R.,
Boroski W.N., Brewington H.J., Brinkmann J., Brunner R., Csabai I., Doi M.,
Eisenstein D.J., Frieman J.A., Fukugita M., Gray J., Harvanek M.,
Heckman T.M., Ivezic Z., Kent S., Kleinman S.J., Knapp G.R., Kron R.G.,
Krzesinski J., Long D.C., Loveday J., Lupton R.H., Margon B., Munn J.A.,
Neilsen E.H., Newberg H.J., Newman P.R., Nichol R.C., Nitta A., Pier J.R.,
Rockosi C.M., Saxe D.H., Schlegel D.J., Snedden S.A., Szalay A.S.,
Thakar A.R., Uomoto A., Voges W., York D.G.
<Astron. J., 130, 367-380 (2005)>
=2005AJ....130..367S 2005AJ....130..367S
ADC_Keywords: QSOs ; Surveys ; Photometry, SDSS ; Redshifts
Keywords: catalogs - quasars: general - surveys
Abstract:
The catalog consists of the 46,420 objects in the SDSS Third Data
Release that have luminosities larger than Mi=-22 (in a cosmology
with Ho=70km/s/Mpc, ΩM=0.3 and ΩΛ=0.7), have at
least one emission line with FWHM larger than 1000 km/s or are
unambiguously broad absorption line quasars, are fainter than i=15.0
and have highly reliable redshifts. The area covered by the catalog is
about 4188 deg2. The quasar redshifts range from 0.08 to 5.41, with
a median value of 1.47; the high-redshift sample includes 520 quasars
at redshifts greater than four, of which 17 are at redshifts greater
than five. For each object the catalog presents positions accurate to
better than 0.2" rms per coordinate, five-band (ugriz) CCD-based
photometry with typical accuracy of 0.03 mag, and information on the
morphology and selection method. The catalog also contains radio,
near-infrared, and X-ray emission properties of the quasars, when
available, from other large-area surveys. The calibrated digital
spectra cover the wavelength region 3800-9200Å at a spectral
resolution of about 2000; the spectra can be retrieved from the public
database using the information provided in the catalog. A total of
44,221 objects in the catalog were discovered by the SDSS; 28,400 of
the SDSS discoveries are reported here for the first time.
Description:
The SDSS uses a CCD camera on a dedicated 2.5m telescope at Apache
Point Observatory, New Mexico, to obtain images in five broad optical
bands (ugriz) over approximately 10,000°2 of the high Galactic
latitude sky. The catalog contains photometry from 136 different SDSS
imaging runs acquired between 1998 September 19 (run 94) and 2003 May
1 (run 3927) and spectra from 826 spectroscopic plates taken between
2000 March 5 and 2003 July 6.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
dr3qso.dat 424 46420 The SDSS quasar catalog III
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See also:
http://www.sdss.org/ : The SDSS Home Page
J/AJ/123/567 : SDSS quasar catalog. I: Early Data Release (Schneider+, 2002)
J/AJ/126/2579 : SDSS quasar catalog. II. First data release (Schneider+, 2003)
J/AJ/125/1817 : SDSS Early-Type Galaxies Catalog (Bernardi+, 2003)
II/259 : The SDSS Photometric Catalog, Release 3 (Abazajian+ 2005)
Byte-by-byte Description of file: dr3qso.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- SDSS Object Designation (1)
20- 29 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000)
31- 40 F10.6 deg DEdeg Declination in decimal degrees (J2000)
42- 47 F6.4 --- z Redshift
49- 54 F6.3 mag umag SDSS u band PSF magnitude (2)
56- 60 F5.3 mag e_umag Error in umag
62- 67 F6.3 mag gmag SDSS g band PSF magnitude (2)
69- 73 F5.3 mag e_gmag Error in gmag
75- 80 F6.3 mag rmag SDSS r band PSF magnitude (2)
82- 86 F5.3 mag e_rmag Error in rmag
88- 93 F6.3 mag imag SDSS i band PSF magnitude (2)
95- 99 F5.3 mag e_imag Error in imag
101-106 F6.3 mag zmag SDSS z band PSF magnitude (2)
108-112 F5.3 mag e_zmag Error in zmag
114-119 F6.3 mag Au Galactic absorption in u band (3)
121-126 F6.3 [cm-2] logHI Log of the Galactic HI column density
128-133 F6.3 mag F20cm FIRST 20cm peak flux density in AB mags (4)
135-141 F7.3 --- w_F20cm The S/N ratio for FIRST flux
143-148 F6.3 arcsec sepR The SDSS/FIRST separation
151 I1 --- fRo [0,1] FIRST flux at optical position but no
source in FIRST catalog flag (5)
154 I1 --- fR1 FIRST source a distance between 2"-30" from
the optical position (6)
157-162 F6.3 [ct/s] logX ?=-9.000 RASS BSC/FSC full band count rate (7)
164-169 F6.3 --- w_logX The S/N ratio for RASS count rate
171-176 F6.3 arcsec sepX The SDSS/RASS separation
178-183 F6.3 mag Jmag ?=0.000 The 2MASS J magnitude (8)
185-189 F5.3 mag e_Jmag Error in Jmag
191-196 F6.3 mag Hmag ?=0.000 The 2MASS H magnitude (8)
198-202 F5.3 mag e_Hmag Error in Hmag
204-209 F6.3 mag Kmag ?=0.000 The 2MASS K magnitude (8)
211-215 F5.3 mag e_Kmag Error in Kmag
218-222 F5.3 arcsec sepH The SDSS/2MASS separation
224-230 F7.3 mag iMAG Absolute i magnitude (9)
233 I1 --- Mph [0,1] The morphology flag (10)
236 I1 --- S1 [0,1] The SCIENCEPRIMARY flag (11)
239 I1 --- mode [1,3] SDSS mode (blends, overlapping scans)
flag (12)
243-251 I9 --- tFlagB Target selection flag (BEST)
254 I1 --- Lz [0,1] Low-z Quasar (color selection only)
target flag (13)
257 I1 --- Hz [0,1] High-z Quasar (color selection only)
target flag (13)
260 I1 --- fR [0,1] FIRST target flag (13)
263 I1 --- fX [0,1] ROSAT target flag (13)
266 I1 --- fS [0,1] Serendipity target flag (13)
269 I1 --- f* [0,1] Star target flag (13)
272 I1 --- fG [0,1] Galaxy target flag (13)
275-278 I4 --- run Imaging run number for photometric measurements
280-284 I5 --- MJD-Im Modified Julian Date of imaging obs.
286-290 I5 --- MJD-Sp Modified Julian Date of spectroscopic obs.
292-295 I4 --- Pnum Spectroscopic Plate Number
297-300 I4 --- Fnum Spectroscopic Fiber Number
303-304 I2 --- rerun SDSS Photometric Processing Rerun Number
307 I1 --- Cam SDSS Camera Column Number
309-312 I4 --- Frame SDSS Frame Number
314-317 I4 --- Obj SDSS Object Number
320-321 I2 --- Ch SDSS Chunk Number
325-333 I9 --- tFlagT Target selection flag (TARGET)
335-340 F6.3 mag uPSF ?=0.000 SDSS (TARGET) u band PSF magnitude (14)
342-346 F5.3 mag e_uPSF Error in uPSF
348-353 F6.3 mag gPSF ?=0.000 SDSS (TARGET) g band PSF magnitude (14)
355-359 F5.3 mag e_gPSF Error in gPSF
361-366 F6.3 mag rPSF ?=0.000 SDSS (TARGET) r band PSF magnitude (14)
368-372 F5.3 mag e_rPSF Error in rPSF
374-379 F6.3 mag iPSF ?=0.000 SDSS (TARGET) i band PSF magnitude (14)
381-385 F5.3 mag e_iPSF Error in iPSF
387-392 F6.3 mag zPSF ?=0.000 SDSS (TARGET) z band PSF magnitude (14)
394-398 F5.3 mag e_zPSF Error in zPSF
400-424 A25 --- Prev Object name if previously published (15)
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Note (1): hhmmss.ss+ddmmss.s (J2000; truncated coordinates).
Note (2): SDSS photometric measurements are asinh magnitudes (Lupton, Gunn, &
Szalay 1999AJ....118.1406L 1999AJ....118.1406L) and are normalized (to ∼3% accuracy) to
the AB-magnitude system (Oke & Gunn 1983ApJ...266..713O 1983ApJ...266..713O). Note that
the ugriz magnitudes are not corrected for Galactic absorption. All
measurements are from BEST processing if available.
Note (3): Where Ag, Ar, Ai, Az = 0.736, 0.534, 0.405, 0.287 x Au.
Note (4): AB mag -2.5 log10[fnu/3631 Jy].
0.000 = no detection;
-1.000 = not in FIRST survey area.
Note (5): FIRST flux at optical position but no source in FIRST catalog flag,
defined as follows:
0 = no detectable flux;
1 = detectable flux.
Note (6): Existence of FIRST source at a distance between 2"-30" from the
optical position, defined as follows:
0 = no such source;
1 = source exists.
Note (7): X-ray data from ROSAT All Sky Survey Bright (Cat. IX/10) and Faint
(IX/29) source catalogs.
-9.000 = no detection.
Note (8): All 2MASS data are from the 2MASS All-Sky Data Release Point Source
Catalog (PSC) 2003 March 25. Note that 2MASS measurements are
Vega-based, not AB, magnitudes.
0.000 = no detection.
Note (9): For H0=70.0; ΩM=0.300; ΩΛ=0.700;
αQ=-0.50.
Note (10): Morphology flag, defined as follows:
0 = point source;
1 = extended.
Note (11): SCIENCEPRIMARY flag, defined as follows:
0 = Object is not SCIENCEPRIMARY;
1 = Object is SCIENCEPRIMARY.
Note (12): SDSS MODE flag, defined as follows:
1 = Primary object;
2 = Secondary observation;
3 = Family observation.
Note (13): Target flags, defined as follows:
0 = not targeted;
1 = targeted.
Note (14): 0.000 indicates the value could not be retrieved from SDSS database.
Note (15): "SDSS" in this column indicates that the object is a previously
published SDSS discovery.
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History:
From electronic version of the journal
References:
Schneider et al., Paper I 2002AJ....123..567S 2002AJ....123..567S, Cat. J/AJ/123/567
Schneider et al., Paper II 2003AJ....126.2579S 2003AJ....126.2579S, Cat. J/AJ/126/2579
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 13-Dec-2005