J/A+A/434/475 Redshifts for X-ray selected AGNs (Kitsionas+, 2005)
On the use of photometric redshifts for X-ray selected AGNs.
Kitsionas S., Hatziminaoglou E., Georgakakis A., Georgantopoulos I.
<Astron. Astrophys. 434, 475 (2005)>
=2005A&A...434..475K 2005A&A...434..475K
ADC_Keywords: QSOs ; Active gal. nuclei ; Redshifts ; Photometry, SDSS
Keywords: technique: photometric - quasars: general - galaxies: active -
galaxies: distances and redshifts - X-rays: galaxies
Abstract:
We present photometric redshift estimates for X-ray selected sources
detected in the XMM/2dF survey. 5-band photometry for 193 sources has
been obtained from the SDSS. We exclude 10 sources associated with
Galactic stars. The tabulated data include the optical coordinate of
all sources in our sample, their photometric redshift estimate, their
r-band magnitude and g-r colour as well as their morphological
classification (these optical parameters have been used in the
discussion of our results). Spectroscopic redshifts are available only
for a sub-sample of our data and are included in Table 1 together with
the survey from which they have been obtained.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 68 88 Photometric redshifts for the 88 X-ray sources with
spectroscopic identification in XMM-Newton/2dF sample
table2.dat 68 95 Photometric redshifts for the 95 X-ray sources without
spectroscopic identification in XMM-Newton/2dF sample
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See also:
B/xmm : XMM-Newton Observation Log (XMM-Newton SOC, 2002)
J/MNRAS/349/135 : XMM-Newton/2dF survey. II. (Georgakakis+, 2004)
J/AJ/125/1817 : SDSS Early-Type Galaxies Catalog (Bernardi+, 2003)
J/AJ/123/567 : SDSS quasar catalog, I: Early Data Release (Schneider+, 2002)
J/AJ/126/2579 : SDSS quasar catalog. II. First data release (Schneider+ 2003)
Byte-by-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq Source index number in increasing RA
5- 6 I2 h RAh Right ascension (J2000) from SDSS
8- 9 I2 min RAm Right ascension (J2000) from SDSS
11- 15 F5.2 s RAs Right ascension (J2000) from SDSS
18 A1 --- DE- Declination sign (J2000)
19- 20 I2 deg DEd Declination (J2000) from SDSS
22- 23 I2 arcmin DEm Declination (J2000) from SDSS
25- 29 F5.2 arcsec DEs Declination (J2000) from SDSS
32- 36 F5.3 --- zph Photometric redshift estimate
40- 44 F5.3 --- zsp ? Spectroscopic redshift measurement,
only in table1.dat
47 I1 --- r_zsp [1/4]? Origin of spectroscopy,
only in table1.dat (1)
50- 55 F6.3 mag rmag SDSS r band magnitude
58- 63 F6.3 mag g-r SDSS g-r colour in mag
67 A1 --- Type Note on morphology (2)
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Note (1): Spectroscopy from:
1 = SDSS, Cat. J/AJ/126/2579
2 = 2QZ, Cat. VII/223
3 = AAT with AUTOFIB or LDSS (Georgantopoulos et al., 1996MNRAS.280..276G 1996MNRAS.280..276G)
4 = our own campaign, Georgakakis et al., 2004, Cat. J/MNRAS/349/135
Note (2): SDSS optical morphology:
P = point-like
E = extended
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Acknowledgements: Spyros Kitsionas, skitsionas(at)aip.de
(End) Patricia Vannier [CDS] 25-Jan-2005