J/MNRAS/349/135 XMM-Newton/2dF survey. II. (Georgakakis+, 2004)
The XMM-Newton/2dF survey -
II. The nature of X-ray-faint optically bright X-ray sources.
Georgakakis A., Georgantopoulos I., Vallbe M., Kolokotronis V.,
Basilakos S., Plionis M., Stewart G.C., Shanks T., Boyle B.J.
<Mon. Not. R. Astron. Soc., 349, 135-145 (2004)>
=2004MNRAS.349..135G 2004MNRAS.349..135G
ADC_Keywords: Surveys ; X-ray sources ; Cross identifications
Keywords: surveys - X-rays: galaxies - X-rays: general
Abstract:
In this paper we investigate the properties of low X-ray-to-optical
flux ratio sources detected in a wide-area (2.5°2) shallow
[fX(0.5-8keV)∼10-14erg/s/cm2] XMM-Newton survey. We find a total
of 26 sources (5 per cent of the total X-ray-selected population) with
log(fX)/f(opt)←0.9 to the above flux limit. Optical spectroscopy is
available for 20 of these low X-ray-to-optical flux ratio objects.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 112 26 Low X-ray-to-optical flux ratio sources in the
XMM-Newton/2dF survey
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See also:
VII/226 : 2dF Galaxy Redshift Survey 100k Data Release (2dFGRS Team, 2001)
B/xmm : XMM-Newton Observation Log (XMM-Newton SOC, 2002)
IX/37 : XMM-Newton Serendipitous Source Catalogue (1XMM) (XMM-SSC, 2003)
J/MNRAS/352/91 : XMM-Newton/2dF survey. IV. (Georgantopoulos+, 2004)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq Sequential number
4- 30 A27 --- Name Name
32- 33 I2 h RAh X-ray source right ascension (J2000.0)
35- 36 I2 min RAm X-ray source right ascension (J2000.0)
38- 42 F5.2 s RAs X-ray source right ascension (J2000.0)
44 A1 --- DE- X-ray source declination sign (J2000.0)
45- 46 I2 deg DEd X-ray source declination (J2000.0)
48- 49 I2 arcmin DEm X-ray source declination (J2000.0)
51- 54 F4.1 arcsec DEs X-ray source declination (J2000.0)
56- 58 F3.1 arcsec Off Offset between the X-ray source centroid
estimated by the EWAVELET task of SAS and the
optical source centre
60- 64 F5.2 mag Bmag B magnitude
66 I1 --- morph [3/6] Optical morphology of the source (1)
68- 73 F6.4 --- z ? Redshift
75- 77 A3 --- r_z Origin of the redshift (2)
79- 82 A4 --- Class Spectral classification of the optical
counterpart
84- 91 A8 --- Comm Comments on the spectrum (3)
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Note (1): morph is coded as follows:
3 = for extended optical light profile (i.e. galaxy)
6 = for unresolved optical light profile (i.e. star or QSO).
Note (2): Notes on redshift:
1 = XMM-Newton/2dF spectroscopic programme
2 = 2dFGRS, Cat. VII/226
3 = Griffiths et al. (1995MNRAS.275...77G 1995MNRAS.275...77G)
4 = 2QZ, Cat. VII/223
5 = SDSS, Cat. J/AJ/126/2579
6 = Terlevich et al. (1991, Cat. J/A+AS/91/285)
Note (3): Comments:
A = absorption lines
NL = narrow emission lines
BL = broad emission lines
EA = absorption + emission lines
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History:
From electronic version of the journal
References:
Georgakakis et al., Paper I 2003MNRAS.344..161G 2003MNRAS.344..161G
Basilakos et al., Paper III 2004MNRAS.351..989B 2004MNRAS.351..989B
(End) James Marcout, Patricia Vannier [CDS] 07-May-2004