Access to Astronomical Catalogues

J/ApJS/155/73    Photometric redshifts of X-ray sources in CDF-S  (Zheng+, 2004)
Photometric redshift of X-ray sources in the Chandra Deep Field-South.
    Zheng W., Mikles V.J., Mainieri V., Hasinger G., Rosati P., Wolf C.,
    Norman C., Szokoly G., Gilli R., Tozzi P., Wang J.X., Zirm A., Giacconi R.
   <Astrophys. J. Suppl. Ser., 155, 73-87 (2004)>
   =2004ApJS..155...73Z
ADC_Keywords: Active gal. nuclei ; QSOs ; Redshifts ; X-ray sources

Keywords: galaxies: active - galaxies: distances and redshifts -
          galaxies: photometry - X-rays: galaxies - X-rays: general

Abstract:
    Based on the photometry of 10 near-ultraviolet, optical, and
    near-infrared bands of the Chandra Deep Field-South, we estimate the
    photometric redshifts for 342 X-ray sources, which constitute ∼99% of
    all the detected X-ray sources in the field.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        60      342   Photometric redshifts of X-ray sources in
                             Chandra Deep Field South


See also:
  II/253         : Chandra Deep Field South: multi-colour data (Wolf+, 2004)
  J/ApJS/139/369 : Chandra Deep Field South. 1 Ms catalog (Giacconi+, 2002)
  J/A+A/379/740  : ESO Imaging Survey (EIS) (Arnouts+, 2001)
  J/A+A/377/442  : Chandra Deep Field South: R-band photometry (Wolf+, 2001)


Byte-by-byte Description of file: table1.dat

   Bytes Format Units  Label    Explanations

   1-  3  I3    ---    XID      CDFS Unique Detection identification number (1)
   5-  6  I2    h      RAh      Hour of Right Ascension (J2000) (2)
   8-  9  I2    min    RAm      Minute of Right Ascension (J2000) (2)
  11- 15  F5.2  s      RAs      Second of Right Ascension (J2000) (2)
      17  A1    ---    DE-      Sign of the Declination (J2000) (2)
  18- 19  I2    deg    DEd      Degree of Declination (J2000) (2)
  21- 22  I2    arcmin DEm      Arcminute of Declination (J2000) (2)
  24- 27  F4.1  arcsec DEs      Arcsecond of Declination (J2000) (2)
  29- 31  F3.1  arcsec Sep      Offset from the X-ray position
  33- 36  F4.2  ---    z        Redshift
  38- 42  F5.2  ---    zmin     Lower limit to z at 95% confidence level (3)
  44- 48  F5.2  ---    zmax     ? Upper limit to z at 95% confidence level (3)
  50- 55  A6    ---    Type     X-ray classification
  57- 59  F3.1  ---    q_z      [0,3] Quality index (4)

Note (1): Identified as [GZW2002] XID NNN in Simbad.

Note (2): Optical counterpart position.

Note (3): Lower and upper limits to z at 95% confidence level:
    -1.00 = spectroscopic redshift.
Note (4): Quality index, defined as follows:
    0.2 = HyperZ (Bolzonella et al., 2000A&A...363..476B) model only;
    0.3 = BPZ (Benitez, 2000ApJ...536..571B) model only;
    0.4 = COMBO-17 (see Cat. II/253) survey only;
    0.5 = BPZ and HyperZ;
    0.6 = COMBO-17 and HyperZ;
    0.7 = COMBO-17 and BPZ;
    0.9 = COMBO-17, BPZ and HyperZ;
    1.2 = Single-line spectrum and HyperZ;
    1.6 = Single-line spectrum, COMBO-17, and HyperZ;
    1.9 = Single-line spectrum, COMBO-17, BPZ and HyperZ;
    2.0 = Secure spectroscopic redshift, but optical counterpart uncertain;
    3.0 = Secure spectroscopic redshift.


History:
    From electronic version of the journal
(End)                   Greg Schwarz [AAS], Marianne Brouty [CDS]    09-May-2005