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 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 2006MNRAS.367..454H; Hodgkin et al., 2009MNRAS.394..675H 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 2008A&A...478..971H, 2009A&A...497..743H 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 429 1121 AGN properties in the SXDS field
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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
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Bytes Format Units Label Explanations
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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 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)
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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
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Acknowledgements:
Mirjana Povic, mpovic(at)iaa.es
(End) Mirjana Povic, [IAA, Spain], Patricia Vannier [CDS] 14-Feb-2012