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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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 135 898 SDSS (Sloan Digital Sky Survey) quasar photometry
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
Bytes Format Units Label Explanations
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)
Note (1): SDSS magnitudes are based on the AB magnitude system Oke & Gunn (1983ApJ...266..713O), and are given as asinh magnitudes Lupton, Gunn, & Szalay (1999AJ....118.1406L). Note (2): As determined from Schlegel et al. (1998ApJ...500..525S). Note (3): Source catalog of each object: 1 = NED; 2 = SDSS.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 30-Aug-2001
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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