Access to Astronomical Catalogues

← Click to display the menu
J/AJ/123/567      SDSS quasar catalog, I: Early Data Release  (Schneider+, 2002)

The Sloan Digital Sky Survey quasar catalog. I. Early data release. Schneider D.P., Richards G.T., Fan X., Hall P.B., Strauss M.A., Vanden Berk D.E., Gunn J.E., Newberg H.J., Reichard T.A., Stoughton C., Voges W., Yanny B., Anderson S.F., Annis J., Bahcall N.A., Bauer A., Bernardi M., Blanton M.R., Boroski W.N., Brinkmann J., Briggs J.W., Brunner R., Burles S., Carey L., Castander F.J., Connolly A.J., Csabai I., Doi M., Friedman S., Frieman J.A., Fukugita M., Heckman T.M., Hennessy G.S., Hindsley R.B., Hogg D.W., Ivezic Z., Kent S., Knapp G.R., Kunzst P.Z., Lamb D.Q., Leger R.F., Long D.C., Loveday J., Lupton R.H., Margon B., Meiksin A., Merelli A., Munn J.A., Newcomb M., Nichol R.C., Owen R., Pier J.R., Pope A., Rockosi C.M., Saxe D.H., Schlegel D., Siegmund W.A., Smee S., Snir Y., Subbarao M., Szalay A.S., Thakar A.R., Uomoto A., Waddell P., York D.G. <Astron. J. 123, 567 (2002)> =2002AJ....123..567S
ADC_Keywords: QSOs ; Surveys ; Photometry, SDSS ; Redshifts Keywords: catalogs - quasars: general - surveys Abstract: We present the first edition of the Sloan Digital Sky Survey (SDSS) Quasar Catalog. The catalog consists of the 3814 objects (3000 discovered by the SDSS) in the initial SDSS public data release that have at least one emission line with a full width at half-maximum larger than 1000 km/s, luminosities brighter than MI*=-23, and highly reliable redshifts. The area covered by the catalog is 494°2 ; the majority of the objects were found in SDSS commissioning data using a multicolor selection technique. The quasar redshifts range from 0.15 to 5.03. 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 0.05 mag, radio and X-ray emission properties, and information on the morphology and selection method. Calibrated spectra of all objects in the catalog, covering the wavelength region 3800-9200Å at a spectral resolution of 1800-2100, are also available. Since the quasars were selected during the commissioning period, a time when the quasar selection algorithm was undergoing frequent revisions, the sample is not homogeneous and is not intended for statistical analysis. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 29 92 SDSS spectroscopic plate information table3.dat 196 3814 The SDSS Quasar Catalog I table5.dat 54 20 Discrepant redshifts
See also: : The SDSS Home Page VII/223 : 2dF QSO Redshift Survey. V. The 10k catalogue (Croom+ 2001) J/AJ/107/1245 : QSOs Palomar Transit Grism Survey catalog (Schneider+ 1994) J/AJ/109/1498 : Large Bright Quasar Survey VI (LBQS) (Hewett+, 1995) J/AJ/119/2540 : Asiago-ESO/RASS QSO survey. I. (Grazian+, 2000) J/ApJS/77/203 : QSO absorption systems (Junkkarinen+ 1991) J/MNRAS/328/805 : The 2dF QSO Redshift Survey - VIII. (Outran+, 2001) J/AJ/121/2308 : Sloan Digital Sky Survey quasar photometry (Richards+, 2001) J/AJ/122/503 : QSO SDSS u*g*r*i*z* photometry and redshift (Anderson+, 2001) J/AJ/126/2579 : SDSS quasar catalog. II First data release (Schneider+ 2003) J/AJ/130/367 : SDSS quasar catalog. III Third data release (Schneider+ 2005) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Plate Plate number 6- 7 I2 h RAh Right ascension (J2000.0) 9- 10 I2 min RAm Right ascension (J2000.0) 12- 15 F4.1 s RAs Right ascension (J2000.0) 17 A1 --- DE- Declination sign (J2000.0) 18- 19 I2 deg DEd Declination (J2000.0) 21- 22 I2 arcmin DEm Declination (J2000.0) 24- 25 I2 arcsec DEs Declination (J2000.0) 27- 29 I3 --- N Number of quasars in the catalog contained on this plate
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1 A1 --- f5 [*] Discrepant redshift (see table5) 2- 19 A18 --- SDSS Object name, (1) 22- 29 I8 10-7rad RArad Right Ascension (J2000) (in 10-7 radians) 32- 39 I8 10-7rad DErad Declination (J2000) (in 10-7 radians) 41- 45 F5.3 --- z Redshift 47 I1 --- r_SDSS Source of object (2) 49- 53 F5.2 mag u*mag The u* band magnitude (7) 55- 58 F4.2 mag e_u*mag The error in u*mag 60- 64 F5.2 mag g*mag The g* band magnitude (7) 66- 69 F4.2 mag e_g*mag The error in g*mag 71- 75 F5.2 mag r*mag The r* band magnitude (7) 77- 80 F4.2 mag e_r*mag The error in r*mag 82- 86 F5.2 mag i*mag The i* band magnitude (7) 88- 91 F4.2 mag e_i*mag The error in i*mag 93- 97 F5.2 mag z*mag The z* band magnitude (7) 99-102 F4.2 mag e_z*mag The error in z*mag 105-108 F4.2 mag uAbs Galactic absorption in u band 110-116 F7.2 mJy PFlux ?=0.00 FIRST peak flux density at 20cm (1.4GHz) 118-123 F6.3 [ct/s] logCR ?=0 Log of ROSAT full band count rate 125-130 F6.2 mag i*Mag Absolute i* band magnitude (3) 133 I1 --- Morph [0,1] Morphologically extended flag (4) 136 I1 --- TarSel [0] Target selection version (5) 139 I1 --- QFlag [0,1] Quasar target flag (6) 142 I1 --- FFlag [0,1] FIRST target flag (6) 145 I1 --- RFlag [0,1] ROSAT target flag (6) 148 I1 --- SFlag [0,1] Serendipity target flag (6) 151 I1 --- StFlag [0,1] Star target flag (6) 154 I1 --- GFlag [0,1] Galaxy target flag (6) 157-160 I4 --- SNum SDSS Imaging Run Number for photometric measurements 162-166 I5 d ObsDate Modified Julian Date (MJD=JD-2400000.5) of spectroscopic observation 169-171 I3 --- Plate Spectroscopic Plate Number 173-175 I3 --- Fiber Spectroscopic Fiber Number 177-196 A20 --- OName Object Name if not discovered by SDSS
Note (1): The full name of an object is SDSS (J2000). Note (2): Source of object 0 = Early Data Release (EDR) quasar; 1 = Extreme BAL Search; 2 = Visual search of Early Data Release (EDR_ spectra. Note (3): Absolute i* band magnitude, assuming H0 = 50km/s/Mpc, ΩM = 1.00, ΩL = 0.00, and αQ = -0.50. Note (4): Morphology flag: 0 = point source; 2 = extended. Note (5): Target selection version (is always 0 in this version) 1 = 2.2a; 2 = 2.5; 3 = 2.7. Note (6): Flags: 0 = not targetted; 2 = targetted. Note (7): For the definition of the SDSS photometric system, see Fukugita, et al., 1996AJ....111.1748F
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1 A1 --- --- [J] indicates J2000 equinox in SDSS name 2- 19 A18 --- SDSS SDSS quasar name 22- 25 F4.2 --- zSDSS SDSS redshift 28- 32 F5.2 --- Dz ? NED-SDSS redshift 35- 54 A20 --- Name NED Object Name
History: From electronic version of the journal * 11-Mar-2002: Corrections made at CDS: table3: flag "f5" added table5: SDSS 130916.67-001550.2 converted into 130916.67-001550.1 to be consistent with table3. References: Schneider et al., Paper II 2002AJ....126.2579S, Cat. J/AJ/126/2579 Schneider et al., Paper III 2005AJ....130..367S, Cat. J/AJ/130/367
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 08-Mar-2002
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© Unistra/CNRS