J/MNRAS/396/2011 X-ray+Radio sources in XBootes (El Bouchefry, 2009)
X-ray identifications of FIRST radio sources in the XBootes field.
El Bouchefry K.
<Mon. Not. R. Astron. Soc., 396, 2011-2037 (2009)>
=2009MNRAS.396.2011E 2009MNRAS.396.2011E
ADC_Keywords: X-ray sources ; Galaxies, radio ; Redshifts ; Photometry
Keywords: galaxies: active - galaxies: high-redshift -
X-rays: diffuse background - X-rays: galaxies
Abstract:
With the goal of investigating the nature and the environment of the
faint radio sources (at mJy level), here are presented results of
X-ray identifications of Faint Imaging Radio Survey at Twenty
centimetres (FIRST) in the 9deg2 Bootes field of the National
Optical Astronomy Observatory (NOAO) Deep Wide Field Survey (NDWFS),
using data from the Chandra XBootes survey. A total of 92 (10 per
cent) FIRST radio sources are identified above the X-ray flux limit
fX)(0.5-7)keV=8x10-15erg/s/cm2, and 79 optical counterparts
are common to both the radio and X-ray sources. Spectroscopic
identifications [obtained from the Sloan Digital Sky Survey (SDSS)
survey] were available for 22 sources (27 per cent).
Description:
The radio data are from the 2002 version of the FIRST VLA catalogue
(Becker et al., 1995, See Cat. VIII/71), and it is derived from 1993
through 2002 observations.
The X-ray data (Kenter et al. 2005, Cat. J/ApJS/161/9; Murray et al.
2005ApJS..161....1M 2005ApJS..161....1M) used in this paper are from the Chandra XBootes
surveys. The XBootes catalogue contains ∼3213 X-ray point sources
and is publicly available through the National Optical Astronomy
Observatory (NOAO) Deep Wide Field Survey (NDWFS) homepage
(http://www.noao.edu/noao/noaodeep/XBootesPublic/index.html)
The NDWFS is a deep multiband imaging (Bw, R, I, J, H, K) designed to
study the formation and evolution of large-scale structures (Jannuzi
et al., 1999, BAAS, 31, 1392; Brown et al., 2003ApJ...597..225B 2003ApJ...597..225B).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 162 79 Characterization of faint radio sources
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See also:
J/ApJS/161/9 : X-ray survey of the NDWFS Bootes field (Kenter+, 2005)
J/ApJ/641/140 : Optical counterparts in the NDWFS Bootes field (Brand+, 2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq Sequential number <[E2009] NN> in Simbad
4- 19 A16 --- Name X-ray object name (X-ray counterparts to
FIRST radio sources), JHHMMSS.s+DDMMSS
21- 22 I2 h RAh Radio right ascension (J2000.0)
24- 25 I2 min RAm Radio right ascension (J2000.0)
27- 30 F4.1 s RAs Radio right ascension (J2000.0)
32 A1 --- DE- Radio declination sign (J2000.0)
33- 34 I2 deg DEd Radio declination (J2000.0)
36- 37 I2 arcmin DEm Radio declination (J2000.0)
39- 42 F4.1 arcsec DEs Radio declination (J2000.0)
44- 49 F6.2 mJy S1.4 Radio flux at 1.4GHz
51- 55 F5.2 aW/m2 Flux Full band (0.5-7keV) X-ray flux (2)
57- 61 F5.2 aW/m2 SFlux Soft band (0.5-2keV) X-ray flux (2)
63- 67 F5.2 aW/m2 HFlux Hard band (2-7keV) X-ray flux (2)
69- 73 F5.2 --- HR [-1,1.1] Hardness ratio (1)
75- 78 F4.2 --- E_HR Error on HR (upper limit)
80- 83 F4.2 --- e_HR Error on HR (lower limit)
85- 89 F5.2 [-] log(FX/Fo) X-ray to optical flux ratio
91- 95 F5.2 [10-7W] logLXS ?=- X-ray luminosity in soft band, 0.5-2keV
97-101 F5.2 [10-7W] logLXH ?=- X-ray luminosity in hard band, 2-7keV
103-107 F5.2 [10-7W] logLX ?=- X-ray luminosity in full band, 0.5-7keV
109-113 F5.2 [W/Hz] logL1.4 1.4GHz radio luminosity (radio power)
115-119 F5.2 mag Rmag ?=- Apparent R magnitude
122-125 F4.2 mag e_Rmag ?=- rms uncertainty on Rmag
127-130 F4.2 mag R-K ?=- R-K colour index
132-135 F4.2 --- stell Source SExtractor stellarity parameter used
to classify sources into point-like objects
and extended sources (0=extended, 1=star)
137-141 F5.3 --- zph Photometric redshift as derived from hyperz
143-148 F6.4 --- E_zph Error on zph (upper limit)
150-155 F6.4 --- e_zph Error on zph (lower limit)
156 A1 --- n_zph [s] s when spectroscopic redshift
158-162 A5 --- Xclass Class of object obtained from the X-ray
characteristics (based on the X-ray
luminosity and the hardness ratio HR)
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Note (1): Hardness ratio HR, derived from the 0.5-2 and 2-8keV band counts
(Kenter et al., 2005ApJS..161....1M 2005ApJS..161....1M)
Note (2): in 10-15erg/cm2/s = 10-18W/m2
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 02-Aug-2010