J/AJ/126/2579 SDSS quasar catalog. II. First data release (Schneider+, 2003)
The Sloan Digital Sky Survey quasar catalog. II. First data release.
Schneider D.P., Fan X., Hall P.B., Jester S., Richards G.T., Stoughton C.,
Strauss M.A., Subbarao M., Vanden Berk D.E., Anderson S.F., Brandt W.N.,
Gunn J.E., Gray J., Trump J.R., Voges W., Yanny B., Bahcall N.A.,
Blanton M.R., Boroski W.N., Brinkmann J., Brunner R., Burles S.,
Castander F.J., Doi M., Eisenstein D., Frieman J.A., Fukugita M.,
Heckman T.M., Hennessy G.S., Ivezic Z., Kent S., Knapp G.R., Lamb D.Q.,
Lee B.C., Loveday J., Lupton R.H., Margon B., Meiksin A., Munn J.A.,
Newberg H.J., Nichol R.C., Niederste-Ostholt M., Pier J.R., Richmond M.W.,
Rockosi C.M., Saxe D.H., Schlegel D.J., Szalay A.S., Thakar A.R.,
Uomoto A., York D.G.
<Astron. J., 126, 2579-2593 (2003)>
=2003AJ....126.2579S 2003AJ....126.2579S
ADC_Keywords: QSOs ; Surveys ; Photometry, SDSS ; Redshifts
Keywords: catalogs - quasars: general - surveys
Abstract:
We present the second edition of the Sloan Digital Sky Survey (SDSS)
Quasar Catalog. The catalog consists of the 16,713 objects in the SDSS
First Data Release that have luminosities larger than Mi=-22 (in a
cosmology with H0=70km/s/Mpc, ΩM=0.3, and
ΩΛ=0.7), have at least one emission line with FWHM
larger than 1000km/s, and have highly reliable redshifts. The area
covered by the catalog is 1360°2. The quasar redshifts range from
0.08 to 5.41, with a median value of 1.43. 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 0.03mag, and information on the morphology and selection
method. The catalog also contains some radio, near-infrared, and X-ray
emission properties of the quasars, when available, from other
large-area surveys. Calibrated digital spectra of all objects in the
catalog, covering the wavelength region 3800-9200Å at a spectral
resolution of 1800-2100, are available. This publication supersedes the
first SDSS Quasar Catalog (2002, Cat. J/AJ/123/567), which was based
on material from the SDSS Early Data Release. A summary of corrections
to current quasar databases is also provided. The majority of the
objects were found in SDSS commissioning data using a multicolor
selection technique. Since the quasar selection algorithm was
undergoing testing during the entire observational period covered by
this catalog, care must be taken when assembling samples from the
catalog for use in statistical studies. A total of 15786 objects (94%)
in the catalog were discovered by the SDSS; 12173 of the SDSS
discoveries are reported here for the first time. Included in the new
discoveries are five quasars brighter than i=16.0 and 17 quasars with
redshifts larger than 4.5.
Description:
The catalog contains photometry from 52 different SDSS imaging runs
taken between 1998 September 19 (Run 94) and 2002 September 5 (Run
3325) and spectra from 291 spectroscopic plates taken between 2000
March 5 and 2001 October 21.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 321 16713 The SDSS Quasar Catalog II
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See also:
J/AJ/123/567 : SDSS quasar catalog. I: Early Data Release (Schneider+, 2002)
J/AJ/130/367 : SDSS quasar catalog. III Third data release (Schneider+ 2005)
J/AJ/125/1817 : SDSS Early-Type Galaxies Catalog (Bernardi+, 2003)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- DR1 Object Designation (1)
20- 29 F10.6 deg RAdeg Right Ascension expressed in degrees (J2000)
31- 40 F10.6 deg DEdeg Declination expressed in degrees (J2000)
42- 47 F6.4 --- z Redshift
49 I1 --- f_DR1 Source of object (2)
51- 56 F6.3 mag umag SDSS u band PSF magnitude (3)
58- 62 F5.3 mag e_umag Error in umag
64- 69 F6.3 mag gmag SDSS g band PSF magnitude (3)
71- 75 F5.3 mag e_gmag Error in gmag
77- 82 F6.3 mag rmag SDSS r band PSF magnitude (3)
84- 88 F5.3 mag e_rmag Error in rmag
90- 95 F6.3 mag imag SDSS i band PSF magnitude (3)
97-101 F5.3 mag e_imag Error in imag
103-108 F6.3 mag zmag SDSS z band PSF magnitude (3)
110-114 F5.3 mag e_zmag Error in zmag
116-121 F6.3 mag Au Galactic absorption in u band (4)
123-128 F6.3 mag F20cm ?=0 FIRST Peak flux density at 20cm (5)
129-136 F8.3 --- F-S/N ?=0 S/N ratio for FIRST flux
138-143 F6.3 arcsec SF-Sep The SDSS/FIRST separation
145-151 F7.3 [ct/s] logCtR ?=0 RASS (Xray) BSC/FSC full band count rate (6)
152-158 F7.3 --- X-S/N S/N ratio for RASS count rate
160-165 F6.3 arcsec SX-Sep SDSS/RASS separation
167-172 F6.3 mag Jmag ?=0.0 2MASS J band magnitude (7)
174-178 F5.3 mag e_Jmag ?=0.0 Error in Jmag
180-185 F6.3 mag Hmag ?=0.0 2MASS H band magnitude (7)
187-191 F5.3 mag e_Hmag ?=0.0 Error in Hmag
193-198 F6.3 mag Kmag ?=0.0 2MASS K band magnitude (7)
200-204 F5.3 mag e_Kmag ?=0.0 Error in Kmag
206-211 F6.3 arcsec S2-Sep SDSS/2MASS separation
213-219 F7.3 mag iMag Absolute SDSS i band magnitude (8)
222 I1 --- MFlag [0,1] Morphology flag (9)
224-225 I2 --- Plate [1,13] Target selection in plate drilling (10)
228 I1 --- TLow-z [0,1] TARGET Low-z Quasar (color selection
only) target flag (11)
231 I1 --- THigh-z [0,1] TARGET High-z Quasar (color selection
only) target flag (11)
234 I1 --- TFIRST [0,1] TARGET FIRST target flag (11)
237 I1 --- TROSAT [0,1] TARGET ROSAT target flag (11)
240 I1 --- TSerend [0,1] TARGET Serendipity target flag (11)
243 I1 --- TStar [0,1] TARGET Star target flag (11)
246 I1 --- TGal [0,1] TARGET Galaxy target flag (11)
249 I1 --- BLow-z [0,1] BEST Low-z Quasar (color selection only)
target flag (11)
252 I1 --- BHigh-z [0,1] BEST High-z Quasar (color selection
only) target flag (11)
255 I1 --- BFIRST [0,1] BEST FIRST target flag (11)
258 I1 --- BROSAT [0,1] BEST ROSAT target flag (11)
261 I1 --- BSerend [0,1] BEST Serendipity target flag (11)
264 I1 --- BStar [0,1] BEST Star target flag (11)
267 I1 --- BGal [0,1] BEST Galaxy target flag (11)
268-273 I6 --- RNum SDSS Imaging Run Number for BEST photometry
274-279 I6 d B-MJD BEST observation Modified Julian Date
280-285 I6 d S-MJD Spectroscopic observation Modified Julian Date
286-290 I5 --- PNum Spectroscopic Plate Number
291-295 I5 --- FNum Spectroscopic Fiber Number
297-321 A25 --- Name Object Name if previously published (12)
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Note (1): Where the position is given in hhmmss.ss+ddmmss.s format
(J2000; truncated coordinates).
Note (2): Source of object:
0 = DR1 Standard Quasar;
1 = Unusual Object Search.
Note (3): In asinh magnitudes (Lupton, Gunn, and Szalay, 1999AJ....118.1406L 1999AJ....118.1406L)
and are normalized (to 10% accuracy) to the AB-magnitude system
(Oke and Gunn, 1983ApJ...266..713O 1983ApJ...266..713O).
Note (4): Ag, Ar, Ai, Az = 0.736, 0.534, 0.405, 0.286 x Au.
Note (5): AB mag = -2.5 log10[fnu/3631Jy].
0 = no detection;
-1 = not in FIRST survey area.
Note (6): Count rate from Rosat All-Sky Survey Bright Source (Cat. IX/10)
and Faint Source (Cat. IX/29) full band:
0 = no detection X-ray data from ROSAT All Sky Survey Bright and
Faint source catalogs.
Note (7): All 2MASS data are from the 2MASS All-Sky Data Release Point Source
Catalog (PSC) 2003 March 25 (Cat. II/246). Note that 2MASS
measurements are Vega-based, not AB, magnitudes.
Note (8): For H0=70km/s/Mpc, ΩM=0.300, ΩL=0.700,
αQ=-0.50.
Note (9): Morphology flag:
0 = point source;
1 = extended.
Note (10): Target selection used in plate drilling:
1 = 2.2;
2 = 2.5;
3 = 2.7;
4 = 2.9;
5 = 2.11;
6 = 2.13.4;
7 = 2.13.1;
8 = 2.13.4b;
9 = 2.13.5;
10 = 2.13.6;
11 = 2.13.7;
12 = 2.13.8;
13 = 3.1.0.
Note (11): Flags:
0 = not targeted;
1 = targeted.
Note (12): "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 III 2005AJ....130..367S 2005AJ....130..367S, Cat. J/AJ/130/367
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 19-Dec-2003