J/MNRAS/352/91 XMM-Newton/2dF survey. IV. (Georgantopoulos+, 2004) ================================================================================ The XMM-Newton/2dF survey - IV. The X-ray spectral properties of the hard sources. Georgantopoulos I., Georgakakis A., Akylas A., Stewart G.C., Giannakis O., Shanks T., Kitsionas S. =2004MNRAS.352...91G ================================================================================ ADC_Keywords: Radio sources ; QSOs ; Active gal. nuclei Keywords: galaxies: active - quasars: general - X-rays: general Abstract: We present an analysis of the X-ray spectral properties of 61 hard X-ray (2-8keV) selected sources from the bright XMM-Newton/2dF (f(2-8keV)>10^-14^erg/cm^2^/s) survey. This comprises nine XMMNewton pointings in the North Galactic Pole region (~1.6deg^2^) and overlaps with the SDSS, 2QZ and 2dFGRS surveys. Our sources contribute about 50 per cent of the 2-10keV X-ray background down to the flux limit of 10^-14^erg/cm^2^/s. The hardness ratio distribution of the sample suggests a deficit of heavily absorbed sources. Spectroscopic identifications exist for 34 sources. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table2.dat 98 61 Optical and X-ray properties of the sample -------------------------------------------------------------------------------- See also: B/xmm : XMM-Newton Observation Log (XMM-Newton SOC, 2002) IX/37 : XMM-Newton Serendipitous Source Catalogue (1XMM) (XMM-SSC, 2003) VII/226 : The 2dF Galaxy Redshift Survey 100k Data Release (2dFGRS, 2001) J/MNRAS/349/135 : XMM-Newton/2dF survey. II. (Georgakakis+, 2004) Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 --- Seq Sequential number 3 A1 --- n_CR [d] if count rate and flux from MOS; otherwise from PN instrument. 5- 6 I2 h RAh X-ray right ascension (J2000) 8- 9 I2 min RAm X-ray right ascension (J2000) 11- 14 F4.1 s RAs X-ray right ascension (J2000) 16 A1 --- DE- X-ray declination sign (J2000) 17- 18 I2 deg DEd X-ray declination (J2000) 20- 21 I2 arcmin DEm X-ray declination (J2000) 23- 24 I2 arcsec DEs X-ray declination (J2000) 26- 30 F5.2 ct/s CR Counte rate at 2-8keV 32- 35 F4.2 ct/s e_CR rms uncertainty on CR 37- 41 F5.2 10-17W/m2 Flux Flux at 2-8keV (10^-14^erg/cm^2^/s) 43- 46 F4.2 10-17W/m2 e_Flux rms uncertainty on Flux 48- 52 I5 s ExpTime ? Total exposure time in 2-8keV band from merged PN + MOS image 54 A1 --- l_Pmemb Limit flag on Pmemb 55- 58 F4.2 % Pmemb ?=- Probability that a given candidate is chance coincidence 60- 62 F3.1 arcsec dr ?=- Separation of the optical counterpart from the X-ray centroid 64- 68 F5.2 mag gmag ? g magnitude of the optical counterpart 70- 79 A10 --- OClass Optical class 81- 86 F6.3 --- z ? Redshift 87 A1 --- u_z [?] Uncertainty flag on z 90- 96 A7 --- Class Classification (2) 98 A1 --- Note [fge] Note (1) -------------------------------------------------------------------------------- Note (1): Notes as follows: e = Photometric redshifts from SDSS catalogue f = X-ray/optical properties indicate Galactic star but spectroscopy not available g = Identification from 2QZ gives a star, but spectrum may be suggesting a galaxy at z= 0.243 Note (2): in this column, the ,eaning is as follows: AL = absorption lines BL = broad lines NL = norrow lines photo-z = photometric redshift from SDSS -------------------------------------------------------------------------------- History: From electronic version of the journal References: Georgakakis et al., Paper I 2003MNRAS.344..161G Georgakakis et al., Paper II 2004MNRAS.349..135G, Cat. Basilakos et al., Paper III 2004MNRAS.351..989B Georgakakis et al., Paper V 2004MNRAS.352.1005G Basilakos et al., Paper VI 2005MNRAS.356..183B Akylas et al., Paper VII 2004MNRAS.353.1015A Gaga et al., Paper VIII 2005MNRAS.363..811G ================================================================================ (End) Patricia Vannier [CDS] 03-Feb-2006