J/ApJ/641/140 Optical counterparts in the NDWFS Bootes field (Brand+, 2006)
The Chandra XBootes survey.
III. Optical and near-infrared counterparts.
Brand K., Brown M.J.I., Dey A., Jannuzi B.T., Kochanek C.S., Kenter A.T.,
Fabricant D., Fazio G.G., Forman W.R., Green P.J., Jones C.J.,
McNamara B.R., Murray S.S., Najita J.R., Rieke M., Shields J.C.,
Vikhlinin A.
<Astrophys. J., 641, 140-157 (2006)>
=2006ApJ...641..140B 2006ApJ...641..140B
ADC_Keywords: Active gal. nuclei ; X-ray sources
Keywords: galaxies: active - surveys - X-rays: galaxies
Abstract:
The XBootes Survey is a 5ks Chandra survey of the Bootes Field of the
NOAO Deep Wide-Field Survey (NDWFS). This survey is unique in that it
is the largest (9.3°2) contiguous region imaged in X-ray with
complementary deep optical and near-infrared (near-IR) observations.
We present a catalog of the optical counterparts to the 3213 X-ray
point sources detected in the XBootes survey. Using a Bayesian
identification scheme, we successfully identified optical counterparts
for 98% of the X-ray point sources.
Description:
A 9.3°2 region of sky chosen to match the area covered with NDWFS
was observed by ACIS-I on the Chandra X-Ray Observatory over a 2 week
time interval in 2003 March and April.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 240 5318 Table showing the optical characteristic of the
matched optical/X-ray catalog for the Chandra
sources in the Bootes field of the NDWFS.
bwfilter.dat 20 901 Transmission curv of the BW filter
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See also:
http://www.noao.edu/noao/noaodeep/ : NOAO Deep Wide-Field Survey
J/ApJS/161/9 : X-ray survey of the NDWFS Bootes field (Kenter+, 2005)
J/AJ/130/923 : Faint radio sources in the NOAO Bootes field (Wrobel+, 2005)
J/AJ/127/213 : LALA Bootes field X-ray source catalog (Wang+, 2004)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [CXOXB]
7- 22 A16 --- CXOXB Name of X-ray source (1)
24- 25 I2 h RAh X-ray Hour of Right Ascension (J2000) (2)
27- 28 I2 min RAm X-ray Minute of Right Ascension (J2000) (2)
30- 34 F5.2 s RAs X-ray Second of Right Ascension (J2000) (2)
36 A1 --- DE- X-ray Sign of the Declination (J2000) (2)
37- 38 I2 deg DEd X-ray Degree of Declination (J2000) (2)
40- 41 I2 arcmin DEm X-ray Arcminute of Declination (J2000) (2)
43- 47 F5.2 arcsec DEs X-ray Arcsec of Declination (J2000) (2)
49- 59 F11.7 deg RAdeg X-ray Decimal degree of RA (J2000) (2)
61- 70 F10.7 deg DEdeg X-ray Decimal degree of Dec (J2000) (2)
72- 75 I4 --- CXOfld Name of X-ray pointing
77- 80 F4.2 --- Popt [0,1] Probability of optical source of being
the true optical counterpart
82- 83 I2 --- Nopt Number of optical sources with >1% probability
of being associated with the X-ray source
85- 86 I2 --- Ropt Optical rank (1=most probable in running
order to least probable)
88- 91 F4.2 --- Pmatch Bayesian probability of match
93- 94 I2 --- St Status of optical cross-match (3)
96-100 A5 --- --- [NDWFS]
102-117 A16 --- NDWFS ? NDWFS optical name (NULL if no opt. ID)
119-120 I2 h RAo.h ? NDWFS Hour of Right Ascension (J2000)
122-123 I2 min RAo.m ? NDWFS Minute of Right Ascension (J2000)
125-129 F5.2 s RAo.s ? NDWFS Seconde of Right Ascension (J2000)
131 A1 --- DEo.- ? NDWFS Sign of the Declination (J2000)
132-133 I2 deg DEo.d ? NDWFS Degree of Declination (J2000)
135-136 I2 arcmin DEo.m ? NDWFS Arcminute of Declination (J2000)
138-142 F5.2 arcsec DEo.s ? NDWFS Arcsecond of Declination (J2000)
144-154 F11.7 deg RAodeg ? NDWFS decimal degree of Right Ascension
(J2000)
156-165 F10.7 deg DEodeg ? NDWFS decimal degree of Declination (J2000)
167-171 F5.2 arcsec offset ? Offset of Optical and X-ray positions
173-177 F5.2 mag BWmag ? The BW band Vega magnitude
179-183 F5.2 mag Rmag ? The R band Vega magnitude
185-189 F5.2 mag Imag ? The I band Vega magnitude
191-195 F5.2 mag Kmag ? The K band Vega magnitude
197-201 F5.2 mag BWlim The BW band 50% completeness limit
203-207 F5.2 mag Rlim The R band 50% completeness limit
209-213 F5.2 mag Ilim The I band 50% completeness limit
215-219 F5.2 mag Klim ?=-1.00 The K band 50% completeness limit
221-224 F4.2 --- class ? Optical Stellarity Parameter
(star=1, galaxy=0) (4)
226-240 A15 --- optfield Optical field name
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Note (1): This is the full electronic table containing the optical/IR
characteristics of the XBootes catalog (Murray et al.
2005ApJS..161....1M 2005ApJS..161....1M; Kenter et al. 2005ApJS..161....9K 2005ApJS..161....9K) from the
NDWFS catalogs (data release 3; Jannuzi & Dey 1999, ASP, 191, 111).
The optical data is available at http://www.noao.edu/noao/noaodeep and
http://archive.noao.edu/nsa/ and will be described by Jannuzi et al.
(in prep.). The near-IR data will be described by Dey et al. (in
prep.). The X-ray data in this table is a subset of the data from
Kenter et al. 2005ApJS..161....9K 2005ApJS..161....9K. We request that any use of this
dataset should reference both these papers (Kenter et al.
2005ApJS..161....9K 2005ApJS..161....9K and Brand et al. 2006ApJ...641..140B 2006ApJ...641..140B).
Note (2): Shifted to NDWFS astrometric frame.
Note (3): Flag on CXOXB, defined as follows:
1 = optical ID;
-3 = no optical ID, but source obscured by nearby star / missing data;
(flag applied manually)
-2 = no optical ID, but X-ray position is close to optically bright
galaxy (source is either obscured by or associated with the galaxy)
-1 = no optical ID (optical image is truly blank)
Note (4): Taken from either the R, Bw, or I-band catalogs in that order of
preference.
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Byte-by-byte Description of file (# are comments) : bwfilter.dat
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Bytes Format Units Label Explanations
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4- 7 I4 0.1nm lambda Wavelength
8- 10 A3 --- --- [.00]
15- 20 F6.3 % Tran Filter transmission
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History:
* 27-Jul-2007: From electronic version of the journal
* 01-Jul-2008: In table 2, the name CXOXB J143143.2+322560 was changed to
CXOXB J143143.2+322600.
References:
Murray et al., Paper I 2005ApJS..161....1M 2005ApJS..161....1M
Kenter et al, Paper II 2005ApJS..161....9K 2005ApJS..161....9K, Cat. J/ApJS/161/9
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 27-Jul-2007