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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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 321 16713 The SDSS Quasar Catalog II
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
Bytes Format Units Label Explanations
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)
Note (1): Where the position is given in 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) and are normalized (to 10% accuracy) to the AB-magnitude system (Oke and Gunn, 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.
History: From electronic version of the journal References: Schneider et al., Paper I 2002AJ....123..567S, Cat. J/AJ/123/567 Schneider et al., Paper III 2005AJ....130..367S, Cat. J/AJ/130/367
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 19-Dec-2003
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