VII/260 The SDSS-DR7 quasar catalog (Schneider+, 2010)
The Sloan Digital Sky Survey quasar catalog. V. Seventh data release. Schneider D.P., Richards G.T., Hall P.B., Strauss M.A., Anderson S.F., Boroson T.A., Ross N.P., Shen Y., Brandt W.N., Fan X., Inada N., Jester S., Knapp G.R., Krawczyk C.M., Thakar A.R., Vanden Berk D.E., Voges W., Yanny B., York D.G., Bahcall N.A., Bizyaev D., Blanton M.R., Brewington H., Brinkmann J., Eisenstein D., Frieman J.A., Fukugita M., Gray J., Gunn J.E., Hibon P., Ivezic Z., Kent S.M., Kron R.G., Lee M.G., Lupton R.H., Malanushenko E., Malanushenko V., Oravetz D., Pan K., Pier J.R., Price T.N., Saxe D.H., Schlegel D.J., Simmons A., Snedden S.A., Subbarao M.U., Szalay A.S., Weinberg D.H. <Astron. J., 139, 2360-2373 (2010)> =2010AJ....139.2360S
ADC_Keywords: QSOs ; Surveys ; Photometry, SDSS ; Redshifts Keywords: catalogs - quasars: general - surveys Abstract: We present the fifth edition of the Sloan Digital Sky Survey (SDSS) Quasar Catalog, which is based upon the SDSS Seventh Data Release. The catalog, which contains 105783 spectroscopically confirmed quasars, represents the conclusion of the SDSS-I and SDSS-II quasar survey. The catalog consists of the SDSS objects that have luminosities larger than Mi=-22.0 (in a cosmology with H0=70km/s/Mpc, ΩM=0.3, and Ω_Λ=0.7), have at least one emission line with FWHM larger than 1000km/s or have interesting/complex absorption features, are fainter than i∼15.0, and have highly reliable redshifts. The catalog covers an area of ∼9380deg2. The quasar redshifts range from 0.065 to 5.46, with a median value of 1.49; the catalog includes 1248 quasars at redshifts greater than 4, of which 56 are at redshifts greater than 5. The catalog contains 9210 quasars with i<18; slightly over half of the entries have i<19. For each object the catalog presents positions accurate to better than 0.1"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 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 ∼2000; the spectra can be retrieved from the SDSS public database using the information provided in the catalog. Over 96% of the objects in the catalog were discovered by the SDSS. We also include a supplemental list of an additional 207 quasars with SDSS spectra whose archive photometric information is incomplete. Description: The SDSS used 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 10000deg2 of the high Galactic latitude sky. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file dr7qso.dat 490 105783 The SDSS quasar catalog V, DR7 (table2 of the paper) table5.dat 164 207 Quasars lacking CAS (Catalog Archive Server) photometry
See also: II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009) J/A+A/505/1087 : DLA in SDSS-DR7 (Noterdaeme+, 2009) J/AJ/121/31 : High-redshift quasars in SDSS (Fan+, 2001) J/AJ/122/503 : SDSS u*g*r*i*z* photometry and redshift of QSOs (Anderson+, 2001) http://www.sdss.org : SDSS Home Page Byte-by-byte Description of file: dr7qso.dat
Bytes Format Units Label Explanations
1- 18 A18 --- SDSS SDSS DR7 object designation (1) 19- 29 F11.6 deg RAdeg Right Ascension in decimal degrees (J2000) 30- 40 F11.6 deg DEdeg Declination in decimal degrees (J2000) 41- 47 F7.4 --- z SDSS redshift 48- 54 F7.3 mag umag ?=0 BEST SDSS u band PSF magnitude (2) 55- 60 F6.3 mag e_umag ?=0 Error in umag 61- 67 F7.3 mag gmag ?=0 BEST SDSS g band PSF magnitude (2) 68- 73 F6.3 mag e_gmag ?=0 Error in gmag 74- 80 F7.3 mag rmag ?=0 BEST SDSS r band PSF magnitude (2) 81- 86 F6.3 mag e_rmag ?=0 Error in rmag 87- 93 F7.3 mag imag ?=0 BEST SDSS i band PSF magnitude (2) 94- 99 F6.3 mag e_imag ?=0 Error in imag 100-106 F7.3 mag zmag ?=0 BEST SDSS z band PSF magnitude (2) 107-112 F6.3 mag e_zmag ?=0 Error in zmag 113-119 F7.3 mag Au Galactic extinction in u filter (3) 120-126 F7.3 [cm-2] logHI Log of Galactic HI column density 127-133 F7.3 mag F20cm ?=0 FIRST 20cm peak flux density (4) 134-141 F8.3 --- w_F20cm Signal-to-Noise ratio for F20cm 142-148 F7.3 arcsec sepR SDSS/FIRST separation 149-156 F8.3 [ct/s] logX ?=-9.000 RASS BSC/FSC full band count rate (5) 157-163 F7.3 --- w_logX Signal-to-Noise ratio for logX 164-170 F7.3 arcsec sepX SDSS/RASS separation 171-177 F7.3 mag Jmag ?=0.000 2MASS J band magnitude (6) 178-183 F6.3 mag e_Jmag ?=0.000 Error in Jmag 184-190 F7.3 mag Hmag ?=0.000 2MASS H band magnitude (6) 191-196 F6.3 mag e_Hmag ?=0.000 Error in Hmag 197-203 F7.3 mag Kmag ?=0.000 2MASS K_S_ band magnitude (6) 204-209 F6.3 mag e_Kmag ?=0.000 Error in Kmag 210-216 F7.3 arcsec sepIR SDSS/2MASS separation 217-219 I3 --- f2M [0/26] 2MASS flags (7) 220-227 F8.3 mag iMAG Absolute SDSS i band magnitude (8) 228-234 F7.3 mag D(g-i) ?=-9.0 Offset of quasar (g-i) from distribution (g-i) mode (9) 235-237 I3 --- Mph [0/1] Morphology flag (1=extended source) 238-240 I3 --- S1 [0/1] SCIENCEPRIMARY flag (1=SCIENCEPRIMARY) 241-243 I3 --- mode [0/3] SDSS MODE flag for blends, overlapping scans (10) 244-246 I3 --- utf [0/1] Uniform target selection flag (11) 249-258 I10 --- TflagB BEST target selection flag 259-261 I3 --- Lz [0/1] Low-z Quasar, color selection only, target flag (1=targeted as Low-z Quasar) 262-264 I3 --- Hz [0/1] High-z Quasar, color selection only, target flag (1=targeted as High-z Quasar) 265-267 I3 --- fR [0/1] FIRST target flag (1=targeted) 268-270 I3 --- fX [0/1] ROSAT target flag (1=targeted) 271-273 I3 --- fS [0/1] Serendipity target flag (1=targeted) 274-276 I3 --- f* [0/1] Star target flag (1=targeted) 277-279 I3 --- fG [0/1] Galaxy target flag (1=targeted) 280-285 I6 --- run SDSS imaging run number for photometric measurements 286-291 I6 d MJD-im Modified Julian Date of imaging observation 292-297 I6 d MJD-sp Modified Julian Date of spectroscopic observation 298-302 I5 --- Plate Spectroscopic Plate number 303-307 I5 --- Fiber Spectroscopic Fiber number 308-311 I4 --- rerun SDSS Photometric Processing Rerun number 312-314 I3 --- Cam [1/6] SDSS Camera Column number 315-319 I5 --- Frame SDSS Frame number 320-324 I5 --- obj SDSS Object number 327-336 I10 --- Tflag TARGET target selection flag 337-339 I3 --- LzT [0/1] Low-z Quasar, color selection only, target flag (1=targeted as Low-z Quasar) 340-342 I3 --- HzT [0/1] High-z Quasar, color selection only, target flag (1=targeted as High-z Quasar) 343-345 I3 --- fRT [0/1] FIRST target flag (1=targeted) 346-348 I3 --- fXT [0/1] ROSAT target flag (1=targeted) 349-351 I3 --- fST [0/1] Serendipity target flag (1=targeted) 352-354 I3 --- f*T [0/1] Star target flag (1=targeted) 355-357 I3 --- fGT [0/1] Galaxy target flag (1=targeted) 358-364 F7.3 mag uTmag ?=0 TARGET SDSS u band PSF magnitude (2) 365-370 F6.3 mag e_uTmag ?=0 Error in uTmag 371-377 F7.3 mag gTmag ?=0 TARGET SDSS g band PSF magnitude (2) 378-383 F6.3 mag e_gTmag ?=0 Error in gTmag 384-390 F7.3 mag rTmag ?=0 TARGET SDSS r band PSF magnitude (2) 391-396 F6.3 mag e_rTmag ?=0 Error in rTmag 397-403 F7.3 mag iTmag ?=0 TARGET SDSS i band PSF magnitude (2) 404-409 F6.3 mag e_iTmag ?=0 Error in iTmag 410-416 F7.3 mag zTmag ?=0 TARGET SDSS z band PSF magnitude (2) 417-422 F6.3 mag e_zTmag ?=0 Error in zTmag 423-443 A21 --- objID BEST object ID; 64-bit integer 444-464 A21 --- specID Spectroscopic Object ID; 64-bit integer 466-490 A25 --- prevID Previously published name (12)
Note (1): In the format HHMMSS.ss+DDMMSS.s (J2000; truncated coordinates). Note (2): SDSS photometric measurements are asinh magnitudes (Lupton, Gunn, and Szalay, 1999AJ....118.1406L) and are normalized (to ∼3% accuracy) to the AB-magnitude system (Oke and Gunn, 1983ApJ...266..713O). Note that the ugriz magnitudes are not corrected for Galactic extinction. "0.000" indicates values not retrieved from SDSS database. Note (3): Where Ag, Ar, Ai, Az = 0.736, 0.534, 0.405, 0.287xAu Note (4): As AB magnitude where ABmag=-2.5log10[fnu/3631Jy]. Values of "0.000" = no detection, "-1.000" = not in FIRST survey area. Note (5): X-ray data from ROSAT All Sky Survey Bright and Faint source catalogs Note (6): 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 (7): Where f2M=9*JFLAG+3*HFLAG+KFLAG Individual filter flags as follows: 0 = no detection; 1 = catalog match; 2 = new photometry on images. Note (8): For Ho=70.0, OmegaM=0.300, OmegaL=0.700, αQ=-0.50. Note (9): In magnitudes of the quasar (g-i) from the mode of the distribution of (g-i) of quasars at this redshift. A value of "-9.0" indicates too few quasars at redshift to form mean relation. All colors corrected for Galactic extinction. Note (10): SDSS mode flag as follows: 1 = Primary object; 2 = Secondary observation; 3 = Family observation. Note (11): Uniform target selection flag as follows: 0 = not selected with final algorithm; 1 = selected with final algorithm. Note (12): "SDSS" in this column indicates that the object is a previously published SDSS discovery.
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 18 A18 --- SDSS SDSS DR7 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 ?=-9.999 SDSS u band PSF magnitude (2) 56- 60 F5.3 mag e_umag ?=9.999 Error in umag 62- 67 F6.3 mag gmag ?=-9.999 SDSS g band PSF magnitude (2) 69- 73 F5.3 mag e_gmag ?=9.999 Error in gmag 75- 80 F6.3 mag rmag ?=-9.999 SDSS r band PSF magnitude (2) 82- 86 F5.3 mag e_rmag ?=9.999 Error in rmag 88- 93 F6.3 mag imag ?=-9.999 SDSS i band PSF magnitude (2) 95- 99 F5.3 mag e_imag ?=9.999 Error in imag 101-106 F6.3 mag zmag ?=-9.999 SDSS z band PSF magnitude (2) 108-112 F5.3 mag e_zmag ?=9.999 Error in zmag 114-118 F5.3 mag Au Galactic extinction in u filter 120 I1 --- Mph [0/1] Morphology; 0=star and 1=galaxy 122-129 I8 --- fPT Primary Target Flag 131-134 I4 --- run Photometric run number 136-138 I3 --- rerun SDSS Photometric Processing Rerun number 140 I1 --- Cam SDSS Camera Column Number 142-144 I3 --- Field Field identification 146-149 I4 --- obj Object identification 151-155 I5 d MJD-sp Modified Julian Date of spectroscopy 157-160 I4 --- Plate Spectroscopic Plate Number 162-164 I3 --- Fiber Spectroscopic Fiber Number
Note (1): In the format HHMMSS.ss+DDMMSS.s (J2000; truncated coordinates). Note (2): SDSS photometric measurements are asinh magnitudes (Lupton, Gunn, and Szalay, 1999AJ....118.1406L) and are normalized (to ∼3% accuracy) to the AB-magnitude system (Oke and Gunn, 1983ApJ...266..713O). Note that the ugriz magnitudes are not corrected for Galactic extinction. "-9.999" indicates values not retrieved from SDSS database.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 26-May-2010
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