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J/AJ/122/503  SDSS u*g*r*i*z* photometry and redshift of QSOs  (Anderson+, 2001)
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High-redshift quasars found in Sloan Digital Sky Survey commissioning data.
 VI. Sloan Digital Sky Survey spectrograph observations.
    Anderson S.F., Fan X., Richards G.T., Schneider D.P., Strauss M.A.,
    Vanden Berk D.E., Gunn J.E., Knapp G.R., Schlegel D., Voges W., Yanny B.,
    Bahcall N.A., Bernardi M., Brinkmann J., Brunner R., Csabai I., Doi M.,
    Fukugita M., Hennessy G.S., Ivezic Z., Kunszt P.Z., Lamb D.Q., Loveday J.,
    Lupton R.H., McKay T.A., Munn J.A., Nichol R.C., Szokoly G.P., York D.G.
   <Astron. J. 122, 503 (2001)>
   =2001AJ....122..503A
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ADC_Keywords: QSOs ; Redshifts ; Photometry
Keywords: early universe - quasars: general

Abstract:
    We present data for over 100 high-redshift quasars found in ~700deg^2^
    by the Sloan Digital Sky Survey (SDSS), using automated selection
    algorithms applied to SDSS imaging data and with spectroscopic
    confirmation obtained during routine spectroscopic observations by the
    Sloan 2.5 m telescope. The SDSS spectra cover the wavelength range
    3900-9200{AA}E at a spectral resolution of 1800 and have been obtained
    for 116 quasars with redshifts greater than 3.94; 92 of these objects
    were previously uncatalogued, significantly increasing the current
    list of published z>4 quasars. The paper also reports observations of
    seven additional new z>4 quasars; all were selected from the SDSS
    imaging survey and spectroscopically confirmed with observations by
    the Apache Point Observatory's 3.5 m telescope or the Hobby-Eberly
    Telescope.

File Summary:
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 FileName   Lrecl  Records   Explanations
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ReadMe         80        .   This file
table1.dat     88      123   Positions and photometry of SDSS high-redshift
                              quasars
table2.dat     38        9   Radio-detected quasars in sample
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See also:
 J/ApJS/123/377 : u*g*r*i*z* Photometry of stars, galaxies, QSOs (Newberg+ 1999)

Byte-by-byte Description of file: table1.dat
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   Bytes Format Units   Label     Explanations
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   1- 19  A19   ---     SDSSp     Quasar designation, based on J2000.0 positions
      20  A1    --    n_SDSSp     [*] *: probable BAL quasar
      21  A1    --    f_SDSSp     [r] detected in radio (see table2)
  22- 25  F4.2  ---     z         Redshift
  27- 30  F4.2  ---   e_z         rms uncertainty on z
  32- 36  F5.2  mag     u*mag     u* magnitude (1)
  38- 41  F4.2  mag   e_u*mag     rms uncertainty on u*mag
  43- 47  F5.2  mag     g*mag     g* magnitude (1)
  49- 52  F4.2  mag   e_g*mag     rms uncertainty on g*mag
  54- 58  F5.2  mag     r*mag     r* magnitude (1)
  60- 63  F4.2  mag   e_r*mag     rms uncertainty on r*mag
  65- 69  F5.2  mag     i*mag     i* magnitude (1)
  71- 74  F4.2  mag   e_i*mag     rms uncertainty on i*mag
  76- 80  F5.2  mag     z*mag     z* magnitude (1)
  82- 85  F4.2  mag   e_z*mag     rms uncertainty on z*mag
  87- 88  I2    ---     Note      ? Notes (2)
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Note (1): Photometry is reported in terms of asinh magnitudes (see Lupton
    et al. 1999AJ....118.1406L for details). In this system, zero flux
    corresponds to 24.6, 25.1, 24.8, 24.4, and 22.8 in u*, g*,r*, i*, and
    z*, respectively.

Note (2): Notes:
    1: SDSS quasar (Fan et al., 2001AJ....121...31F)
    2: spectrum obtained with Hobby-Eberly Telescope
    3: PSS quasar (Kennefick et al., 1995AJ....110...78K)
    4: BRI quasar (finding chart in Smith et al., 1994AJ....108.1147S)
    5: spectrum obtained with APO 3.5 m telescope
    6: unpublished PSS quasar; see http://astro.caltech.edu/~george/z4.qsos
    7: SDSS quasar (Fan et al., 1999AJ....118....1F)
    8: BRI quasar (finding chart in Smith et al., 1994AJ....107...24S)
    9: SDSS quasar (Schneider et al., 2001AJ....121.1232S)
   10: SDSS quasar (Fan et al., 2000AJ....119....1F)
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Byte-by-byte Description of file: table2.dat
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   Bytes Format Units   Label     Explanations
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   1- 19  A19   ---     SDSSp     Quasar designation, based on J2000.0 positions
      20  A1    ---   n_SDSSp     [b] b: previously known radio quasar
  23- 26  F4.2  ---     z         Redshift
  28- 32  F5.2  mJy     F20cm     Radio flux at 20cm (1.5GHz)
  34- 38  A5    ---     Source    FIRST or NVSS source
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History:
    From electronic version of the journal
    In table 2, 2 SDSSp names were corrected to adjust to their name in table1:
       J102043.82+000105.8 (originally J102043.83+000105.8) and
       J105320.43-001649.6 (originally J105320.43-001649.2)

References:
   Fan et al.,       Paper I        1999AJ....118....1F
   Fan et al.,       Paper II       2000AJ....119....1F
   Fan et al.,       Paper III      2001AJ....121...31F
   Fan et al.,       Paper IV       2001AJ....121...54F
   Schneider et al., Paper V        2001AJ....121.1232S
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(End)                         James Marcout, Patricia Bauer [CDS]    28-Sep-2001