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 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:
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FileName Lrecl Records Explanations
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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
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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
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Bytes Format Units Label Explanations
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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 KS 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)
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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 1999AJ....118.1406L) and are normalized (to ∼3% accuracy)
to the AB-magnitude system (Oke and Gunn, 1983ApJ...266..713O 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.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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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
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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 1999AJ....118.1406L) and are normalized (to ∼3% accuracy)
to the AB-magnitude system (Oke and Gunn, 1983ApJ...266..713O 1983ApJ...266..713O). Note
that the ugriz magnitudes are not corrected for Galactic extinction.
"-9.999" indicates values not retrieved from SDSS database.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 26-May-2010