J/MNRAS/366/171 Red AGN in XMM/SDSS fields (Georgakakis+, 2006) ================================================================================ Red active galactic nuclei in XMM-Newton/Sloan Digital Sky Survey fields. Georgakakis A.E., Georgantopoulos I., Akylas A. =2006MNRAS.366..171G ================================================================================ ADC_Keywords: Surveys ; X-ray sources ; Active gal. nuclei Keywords: surveys - X-rays: galaxies - X-rays: general Abstract: In this paper we combine archival and proprietary XMM-Newton observations (about 5deg^2^) that overlap with the Sloan Digital Sky Survey to explore the nature of the moderate-z X-ray population. We focus on X-ray sources with optically red colours (g-r>0.4), which we argue are important for understanding the origin of the X-ray background (XRB). Description: In this paper, we use 28 XMM-Newton archival observations selected to overlap with the second data release of the SDSS (DR2, Stoughton et al., 2002AJ....123..485S) and with a proprietary period that expired before 2003 September. For this paper, the source extraction is performed in the 2-8keV merged PN plus MOS images (when available) using the EWAVELET task of SAS with a detection threshold of 6{sigma}. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 112 84 Optical and X-ray properties of the hard X-ray selected sample -------------------------------------------------------------------------------- See also: http://www.sdss.org/ : SDSS Home Page J/A+A/432/69 : Extremely Red Objects XMM-Newton observations (Brusa+, 2005) J/MNRAS/349/135 : XMM-Newton/2dF survey. II. (Georgakakis+, 2004) J/MNRAS/352/91 : XMM-Newton/2dF survey. IV. (Georgantopoulos+, 2004) Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 --- [GGA2006] Sequential number 3 A1 --- n_[GGA2006] Note on [GGA2006] (1) 5- 6 I2 h RAh X-ray Right ascension (J2000) 8- 9 I2 min RAm X-ray Right ascension (J2000) 11- 15 F5.2 s RAs X-ray Right ascension (J2000) 17 A1 --- DE- Declination sign (J2000) 18- 19 I2 deg DEd Declination (J2000) 21- 22 I2 arcmin DEm Declination (J2000) 24- 28 F5.2 arcsec DEs Declination (J2000) 30- 34 F5.2 mag rmag r magnitude 36 A1 --- l_P Limit flag on P 37- 40 F4.2 % P Probability that the optical counterpart is a chance coincidence 42- 46 F5.2 10-17W/m2 FX X-ray flux in the 2-8keV band 48- 51 F4.2 10-17W/m2 e_FX rms uncertainty on FX 53- 57 F5.2 --- logFX/Fopt X-ray-to-optical flux ratio 59- 63 F5.3 --- zsp ?=- Spetroscopic redshift 65- 66 A2 --- SpClass Spetroscopic classification (2) 68- 72 F5.3 --- zph ?=- Photometric redshift 74- 78 F5.2 --- logLX X-ray luminosity in the 2-8keV band, corrected for X-ray absorption 80 A1 --- l_NH Limit flag on NH 81- 85 F5.2 10+22cm-2 NH ?=- Rest-frame hydrogen column density 87- 91 F5.2 10+22cm-2 E_NH ? Error on NH (upper limit) 93- 97 F5.2 10+22cm-2 e_NH ? Error on NH (lower limit) 99-102 F4.2 --- Gamma ?=- Power-law spectral index 104-107 F4.2 --- E_Gamma ? Error on Gamma (upper limit) 109-112 F4.2 --- e_Gamma ? Error on Gamma (lower limit) -------------------------------------------------------------------------------- Note (1): Notes as follows: a = Photometric redshift from the LX-log(FX-Fopt) b = Source #72 is classified Galactic star by 2QZ. Inspection of the optical spectrum however, suggests an early-type galaxy at z=0.243. c = Source #84 has no spectral classification in NED Note (2): Spectral class as follows: AL = for absorption-line systems NL = for narrow emission-line sources BL = broad emission-line optical spectra -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Patricia Vannier [CDS] 02-Jun-2006