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J/A+A/541/A118      AGN-Host Galaxy Connection               (Povic+, 2012)

AGN-Host Galaxy Connection: Morphology and colours of X-ray selected AGN at z<2. Povic M., Sanchez-Portal M., Perez Garcia A.M., Bongiovanni A., Cepa J., Huertas-Company M., Lara-Lopez M.A., Fernandez Lorenzo M., Ederoclite A., Alfaro E., Castaneda H., Gallego J., Gonzalez-Serrano J.I., Gonzalez J.J. <Astron. Astrophys. 541, A118 (2012)> =2012A&A...541A.118P
ADC_Keywords: Active gal. nuclei ; Morphology ; X-ray sources Keywords: Galaxies: active - Galaxies: fundamental parameters - Galaxies: distances and redshifts - Galaxies: structure - X-rays: galaxies Abstract: We present the results of morphological and colour analysis of X-ray detected AGN in the SXDS field. X-ray data were gathered from the XMM-Newton scientific archive, and were reduced by our team using the standard SAS procedures. The obtained catalogue of 1121 X-ray emitters was cross-matched with the publicly available optical catalogue (Furusawa et al., 2008, Cat. J/ApJS/176/1), using a cross-matched radius of 3 arcsec and obtaining 806 optical counterparts. For these objects the photometric redshifts, K-corrections, morphological, X-ray, and rest-frame colour properties were measured and analysed. Description: Table presents the X-ray properties of all 1121 objects, including fluxes in six selected energy bands, and public available optical data for X-ray counterparts. X-ray flux in X/O flux ratio is the sum of fluxes in (0.5-2keV) and (2-4.5keV) bands, while the optical flux corresponds to R band. The represented hardness ratio was set using the same X-ray bands. Photometric redshifts and K-corrections were measured using the photometric information in five optical (Furusawa et al., 2008, Cat. J/ApJS/176/1), three NIR (Hewett et al., 2006MNRAS.367..454H; Hodgkin et al., 2009MNRAS.394..675H), and four MIR IRAC (SWIRE survey) bands. Morphological classification was obtained using the galSVM code (Huertas-Company et al., 2008A&A...478..971H, 2009A&A...497..743H), one of the new methods useful especially when dealing with high-redshift sources and low-resolution data. With galSVM we obtained the mean surface brightness, asymmetry, concentration index, Gini, Smoothness, M20 moment of light, and two probabilities p1 and p2 that the galaxy belongs to early- (E, S0, S0/Sa) or late-type, respectively. Stellarity and elongation parameters were obtained with SExtractor. All objects with stellarity parameter greater or equal to 0.9 were considered as compact in this work. We included in our analysis for early-type objects only those sources with p1 probabilities greater or equal to 0.75, and for late-type objects all sources with probabilities p2 greater than 0.5. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 429 1121 AGN properties in the SXDS field
See also: J/ApJS/176/1 : Subaru/XMM-Newton deep survey (SXDS). II. (Furusawa+, 2008) J/ApJS/179/124 : Subaru/XMM-Newton deep survey (SXDS). III. (Ueda+, 2008) J/ApJS/176/301 : Subaru/XMM-Newton deep survey (SXDS). IV. (Ouchi+, 2008) Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 4 I4 --- ID [1/1121] Identification number 6- 15 F10.7 deg RAdeg X-ray Right ascension (J2000) 17- 26 F10.7 deg DEdeg X-ray Declination (J2000) 28- 40 E13.8 mW/m2 FS ?=0 X-ray flux in the soft (0.5-2keV) band 42- 54 E13.8 mW/m2 FH ?=0 X-ray flux in the hard (2-4.5keV) band 56- 68 E13.8 mW/m2 FVH ?=0 X-ray flux in the veryhard (4.5-10keV) band 70- 82 E13.8 mW/m2 FTot X-ray flux in the total (0.5-10keV) band 84- 96 E13.8 mW/m2 FVH2 ?=0 X-ray flux in the veryhard2 (4-7keV) band 98-110 E13.8 mW/m2 FTot2 X-ray flux in the total2 (0.5-7keV) band 112-125 A14 --- SXDS Object name in the SXDS optical catalogue (Furusawa et al. 2008ApJS..176....1F) 127-141 F15.12 deg RAOdeg ?=- Optical Right ascension (J2000) 143-157 F15.12 deg DEOdeg ?=- Optical Declination (J2000) 159-165 F7.4 mag Rc ?=- Rc apparent AB magnitude 167-172 E6.4 mag e_Rc ?=- Rc apparent AB magnitude error 174-178 F5.3 --- zph ?=- Photometric redshift 180-200 E21.19 --- e_zph ?=- Photometric redshift error 202-212 F11.7 mag BMAG ?=- Absolute magnitude in B band 214-219 E6.4 mag e_BMAG ?=- Absolute magnitude error in B band 221-241 F21.18 mag B-V ?=- Rest-frame B-V colour 243-254 F12.10 mag e_B-V ?=- Rest-frame B-V colour error 256-278 F23.19 --- X/O ?=- X-ray-to-optical flux ratio 280-301 E22.19 --- e_X/O ?=- X-ray-to-optical flux ratio error 303-312 E10.7 --- HR ?=- (2-4.5/0.5-2 keV) hardness ratio 314-322 F9.7 --- e_HR ?=- (2-4.5/0.5-2 keV) hardness ratio error 324-327 F4.2 --- S/G [0/1]?=- SExtractor CLASS STAR parameter (1) 329-337 F9.7 --- Elong [1/3]?=- Elongation 339-348 F10.7 mag/arcsec2 MSB ?=- Mean Surface Brightness 350-363 E14.8 --- A ?=- Asymmetry (2) 365-374 F10.7 --- C ?=- Abraham concentration index (3) 376-384 F9.7 --- Gini ?=- Gini coefficient (4) 386-396 F11.7 --- S ?=- Smoothness (5) 398-407 F10.7 --- M20 ?=- Moment of light M20 (6) 409-418 E10.6 --- p1 ?=- Probability that the galaxy belongs to early-type (7) 420-429 E10.7 --- p2 ?=- Probability that the galaxy belongs to late-type (8)
Note (1): Objects assigned as compact are all objects with this parameter ≥0.9 Note (2): Asymmetry index measured by galSVM, defined as in Abraham et al. (1996, Cat. J/ApJS/107/1) Note (3): Abraham concentration index, measured by galSVM and defined as the ratio between the integrated flux within certain radius defined by the normalized radius = 0.3, and the total flux (Abraham et al. 1996) Note (4): Gini coefficient measured by galSVM and defined as in Abraham et al. (2003, Cat. J/ApJ/588/218) Note (5): Smoothness of the source, measured by galSVM and defined as in Conselice et al. (2003, Cat. J/AJ/126/1183) Note (6): Moment of light M20, measured by galSVM and defined as in Lotz et al. (2004, Cat. J/AJ/128/163) Note (7): We included in our analysis as early-type objects (E, S0, S0/Sa) all sources with p1>0.75 Note (8): We included in our analysis as late-type objects all sources with p2>0.5
Acknowledgements: Mirjana Povic, mpovic(at)
(End) Mirjana Povic, [IAA, Spain], Patricia Vannier [CDS] 14-Feb-2012
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