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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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file dr3qso.dat 424 46420 The SDSS quasar catalog III
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
Bytes Format Units Label Explanations
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)
Note (1): hhmmss.ss+ddmmss.s (J2000; truncated coordinates). Note (2): SDSS photometric measurements are asinh magnitudes (Lupton, Gunn, & Szalay 1999AJ....118.1406L) and are normalized (to ∼3% accuracy) to the AB-magnitude system (Oke & Gunn 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.
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 II 2003AJ....126.2579S, Cat. J/AJ/126/2579
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 13-Dec-2005
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

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