J/AJ/121/2308 Sloan Digital Sky Survey quasar photometry (Richards+, 2001)
Colors of 2625 quasars at 0<z<5 measured in the
Sloan Digital Sky Survey photometric system.
Richards G.T., Fan X., Schneider D.P., Vanden Berk D.E., Strauss M.A.,
York D.G., Anderson J.E.Jr, Anderson S.F., Annis J., Bahcall N.A.,
Bernardi M., Briggs J.W., Brinkmann J., Brunner R., Burles S., Carey L.,
Castander F.J., Connolly A.J., Crocker J.H., Csabai I., Doi M.,
Finkbeiner D., Friedman S.D., Frieman J.A., Fukugita M., Gunn J.E.,
Hindsley R.B., Ivezic Z., Kent S., Knapp G.R., Lamb D.Q., Leger R.F.,
Long D.C., Loveday J., Lupton R.H., McKay T.A., Meiksin A., Merrelli A.,
Munn J.A., Newberg H.J., Newcomb M., Nichol R.C., Owen R., Pier J.R.,
Pope A., Richmond M.W., Rockosi C.M., Schlegel D.J., Siegmund W.A., Smee S.,
Snir Y., Stoughton C., Stubbs C., Subbarao M., Szalay A.S., Szokoly G.P.,
Tremonti C., Uomoto A., Waddell P., Yanny B., Zheng W.
<Astron. J. 121, 2308 (2001)>
=2001AJ....121.2308R 2001AJ....121.2308R
ADC_Keywords: QSOs ; Surveys ; Photometry
Keywords: catalogs - quasars: general - survey
Abstract:
We present an empirical investigation of the colors of quasars in the
Sloan Digital Sky Survey (SDSS) photometric system. The sample studied
includes 2625 quasars with SDSS photometry: 1759 quasars found during
SDSS spectroscopic commissioning and SDSS follow-up observations on
other telescopes, 50 matches to FIRST quasars, 573 matches to quasars
from the NASA Extragalactic Database, and 243 quasars from two or more
of these sources. The quasars are distributed in a 2.5° wide
stripe centered on the celestial equator covering ∼529deg2.
Positions (accurate to 0.2") and SDSS magnitudes are given for the 898
quasars known prior to SDSS spectroscopic commissioning.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 135 898 SDSS (Sloan Digital Sky Survey) quasar photometry
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See also:
J/AJ/115/296 : SDSS new variables (Henden+ 1998)
J/AJ/119/2598 : u'g'r'i'z' photometry of LCRS galaxies (Sowards-Emmerd+, 2000)
J/AJ/121/2331 : Coma cluster SDSS spectrosc. commissioning (Castander+, 2001)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 30 A30 --- Name Quasar name
32- 36 F5.3 --- z Redshift
38- 39 I2 h RAh Right Ascension (J2000)
41- 42 I2 min RAm Right Ascension (J2000)
44- 48 F5.2 s RAs Right Ascension (J2000)
50 A1 --- DE- Sign of the Declination (J2000)
51- 52 I2 deg DEd Declination (J2000)
54- 55 I2 arcmin DEm Declination (J2000)
57- 60 F4.1 arcsec DEs Declination (J2000)
62- 65 F4.2 arcsec DelPos Difference between SDSS and cataloged positions
67- 71 F5.2 mag u*mag The SDSS u* band photometry (1)
73- 77 F5.3 mag e_u*mag Uncertainty in umag
79- 83 F5.2 mag g*mag The SDSS g* band photometry (1)
85- 89 F5.3 mag e_g*mag Uncertainty in gmag
91- 95 F5.2 mag r*mag The SDSS r* band photometry (1)
97-101 F5.3 mag e_r*mag Uncertainty in rmag
103-107 F5.2 mag i*mag The SDSS i* band photometry (1)
109-113 F5.3 mag e_i*mag Uncertainty in imag
115-119 F5.2 mag z*mag The SDSS z* band photometry (1)
121-125 F5.3 mag e_z*mag Uncertainty in zmag
127-130 F4.2 mag RedVec Reddening vector in E(g* - r*) (2)
132-134 A3 --- r_Name Source catalog of each object (3)
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Note (1): SDSS magnitudes are based on the AB magnitude system Oke & Gunn
(1983ApJ...266..713O 1983ApJ...266..713O), and are given as asinh magnitudes
Lupton, Gunn, & Szalay (1999AJ....118.1406L 1999AJ....118.1406L).
Note (2): As determined from Schlegel et al. (1998ApJ...500..525S 1998ApJ...500..525S).
Note (3): Source catalog of each object:
1 = NED;
2 = SDSS.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 30-Aug-2001