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J/ApJ/693/8         High-redshift QSOs in the COSMOS survey       (Brusa+, 2009)

High-redshift quasars in the COSMOS survey: the space density of z>3 X-ray selected QSOs. Brusa M., Comastri A., Gilli R., Hasinger G., Iwasawa K., Mainieri V., Mignoli M., Salvato M., Zamorani G., Bongiorno A., Cappelluti N., Civano F., Fiore F., Merloni A., Silverman J., Trump J., Vignali C., Capak P., Elvis M., Ilbert O., Impey C., Lilly S. <Astrophys. J., 693, 8-22 (2009)> =2009ApJ...693....8B
ADC_Keywords: QSOs ; Cross identifications ; Surveys ; Redshifts ; X-ray sources Keywords: galaxies: active - surveys - X-rays: galaxies Abstract: We present a new measurement of the space density of high-redshift (z∼3.0-4.5), X-ray-selected quasi-stellar objects (QSOs) obtained by exploiting the deep and uniform multiwavelength coverage of the COSMOS survey. We have assembled a large (40 objects), homogeneous sample of z>3 QSOs with X-ray flux F0.5-2keV>10-15erg/cm2/s, and available spectroscopic (22) or photometric (18) redshifts. We discuss their optical (color-color diagrams) and X-ray properties, their number counts and space densities and compare our findings with previous works and model predictions. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 113 40 Coordinates and properties of the z>3 QSOs from the XMM-COSMOS sample
See also: II/284 : COSMOS Multi-Wavelength Photometry Catalog (Capak+, 2007) J/A+A/497/635 : XMM-Newton wide-field survey in COSMOS field (Cappelluti+, 2009) J/ApJS/172/29 : XMM-Newton survey in COSMOS field. I. (Hasinger+, 2007) J/ApJS/172/182 : XMM Clusters of galaxies in COSMOS field (Finoguenov+, 2007) J/ApJ/644/100 : SDSS quasars in the COSMOS field (Prescott+, 2006) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 5 A5 --- --- [XMMC_] 6- 21 A16 --- [BCG2009] Name (JHHMMSS.s+DDMMSS) 23- 27 I5 --- XMMC X-ray number from the XMM-COSMOS (1) 29- 35 I7 --- COSMOS Optical identifier number (2) 37- 38 I2 h RAh Optical hour of right ascension (J2000) 40- 41 I2 min RAm Optical minute of right ascension (J2000) 43- 47 F5.2 s RAs Optical second of right ascension (J2000) 49 A1 --- DE- Optical declination sign (J2000) 50- 51 I2 deg DEd Optical degree of declination (J2000) 53- 54 I2 arcmin DEm Optical arcminute of declination (J2000) 56- 60 F5.2 arcsec DEs Optical arcsecond of declination (J2000) 62- 66 F5.3 --- zsp ? Spectroscopic redshift 67- 69 A3 --- f_zsp Note on the redshift (3) 71- 74 F4.2 --- zph Photometric redshift 76- 79 F4.2 --- zphL Lower limit of zph 81- 84 F4.2 --- zphU Upper limit of zph 85- 87 A3 --- f_zph [efi, ] Note on zph (3) 89- 93 F5.2 mag imagA COSMOS total AB i-band magnitude (2) 95- 99 F5.2 aW/m2 Flx 0.5-2kev X-ray flux (in 10-15cgs unit) 100 A1 --- f_Flx [l] Marginal detection (3) 102-106 F5.2 [10-7W] logL Log of rest-frame 2-10kev (hard) X-ray luminosity (in cgs unit) 108 A1 --- l_HR Limit flag on HR 109-113 F5.2 --- HR Hardness ratio
Note (1): From catalog (Cappelluti et al. 2009, Cat. J/A+A/497/635; <XMMC NNNNNN> in Simbad) Note (2): From the photometric COSMOS catalog published by Capak et al. (2007, Cat. II/284; <COSMOS NNNNNNN> in Simbad). Photometry in the optical bands can be retrieved from IRSA at the link: Note (3): Flags as follows: d = BAL QSO. e = Objects with large χ2 minima (extending at z<3). f = Objects which have a comparable photo-z solution at z<3. g = Single line spectrum. i = Undetected in the U-band. l = Source detected in the hard band, but below the threshold (10-15erg/cm2/s) in the soft band. m = Candidate NL QSO (FWHM<1500km/s).
History: From electronic version of the journal
(End) Emmanuelle Perret [CDS] 07-Mar-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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