J/ApJS/179/1 The OPTX project: CLANS, CLASXS and CDF-N (Trouille+, 2008)
The OPTX project.
I. The flux and redshift catalogs for the CLANS, CLASXS, and CDF-N fields.
Trouille L., Barger A.J., Cowie L.L., Yang Y., Mushotzky R.F.
<Astrophys. J. Suppl. Ser., 179, 1-18 (2008)>
=2008ApJS..179....1T 2008ApJS..179....1T
ADC_Keywords: X-ray sources ; Spectroscopy ; Redshifts ; Photometry, SDSS
Photometry, infrared
Keywords: cosmology: observations - galaxies: active
Abstract:
We present the redshift catalogs for the X-ray sources detected in
the Chandra Deep Field-North (CDF-N), the Chandra Large Area Synoptic
X-ray Survey (CLASXS), and the Chandra Lockman Area North Survey
(CLANS). The catalogs for the CDF-N and CLASXS fields include
redshifts from previous work, while the redshifts for the CLANS field
are all new. For fluxes above 10-14ergs/cm2/s (2-8keV) we have
redshifts for 76% of the sources. We extend the redshift information
for the full sample using photometric redshifts. The goal of the OPTX
Project is to use these three surveys, which are among the most
spectroscopically complete surveys to date, to analyze the effect of
spectral type on the shape and evolution of the X-ray luminosity
functions and to compare the optical spectral types with the X-ray
spectral properties. We also present the CLANS X-ray catalog. The nine
ACIS-I fields cover a solid angle of ∼0.6deg2 and reach fluxes of
7x10-16ergs/cm2/s (0.5-2keV) and 3.5x10-15ergs/cm2/s (2-8keV).
We find a total of 761 X-ray point sources. In addition, we present
the optical and infrared photometric catalog for the CLANS X-ray
sources, as well as updated optical and infrared photometric catalogs
for the X-ray sources in the CLASXS and CDF-N fields.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table4.dat 146 761 CLANS X-ray catalog: basic source properties
table5.dat 81 761 CLANS X-ray catalog: additional source properties
table11.dat 99 761 CLANS Optical/IR counterparts catalog
table12.dat 134 525 CLASXS Optical/IR counterparts catalog
table13.dat 134 503 CDF-N Optical/IR counterparts catalog
--------------------------------------------------------------------------------
See also:
B/chandra : The Chandra Archive Log (CXC, 1999-)
J/ApJ/653/1004 : Galaxies at 1.4≲z≲3.0 in GOODS-North Field (Reddy+, 2006)
J/ApJ/622/772 : Redshift survey of submillimeter galaxies (Chapman+, 2005)
J/AJ/128/1483 : Optical properties of the CLASXS X-ray sample (Steffen+, 2004)
J/AJ/128/1501 : CLASXS: X-ray catalog (Yang+, 2004)
J/AJ/126/632 : UBVRIz'HK' photometry of 2Ms CDFN X-ray sources (Barger+, 2003)
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- CLANS Identification number (in RA order)
5- 13 F9.5 deg RAdeg X-ray right ascension (J2000)
15- 22 F8.5 deg DEdeg X-ray declination (J2000)
24- 28 F5.3 arcsec e_RAdeg Wavdetect 95% confidence error in RAdeg
30- 34 F5.3 arcsec e_DEdeg Wavdetect 95% confidence error in DEdeg
36 A1 --- l_F0.5-2 Limit flag on F0.5-2 (2)
37- 42 F6.2 aW/m2 F0.5-2 The 0.5-2keV flux (3)
44- 49 F6.2 aW/m2 e_F0.5-2 ?=-99 1σ Poisson lower error (F0.5-2) (4)
51- 56 F6.2 aW/m2 E_F0.5-2 ?=-99 1σ Poisson upper error (F0.5-2) (4)
58 A1 --- l_F2-8 Limit flag on F2-8 (2)
59- 65 F7.2 aW/m2 F2-8 The 2-8 keV flux (3)
67- 72 F6.2 aW/m2 e_F2-8 ?=-99 1σ Poisson lower error (F2-8) (4)
74- 79 F6.2 aW/m2 E_F2-8 ?=-99 1σ Poisson upper error (F2-8) (4)
81- 86 F6.2 aW/m2 F0.5-8 The 0.5-8 keV flux (3)
88- 93 F6.2 aW/m2 e_F0.5-8 ?=-99 1σ Poisson lower error (F0.5-8) (4)
95-100 F6.2 aW/m2 E_F0.5-8 ?=-99 1σ Poisson upper error (F0.5-8) (4)
102 A1 --- l_HR Limit Flag on HR (5)
103-109 F7.2 --- HR Hardness ratio (6)
111-117 F7.2 --- e_HR ?=-99 1σ lower error in HR
119-125 F7.2 --- E_HR ?=-99 1σ upper error in HR
127-132 F6.2 --- Gamma ?=-99 Power law photon index
134-139 F6.2 --- e_Gamma ?=-99 1σ lower error in Gamma
141-146 F6.2 --- E_Gamma ?=-99 1σ upper error in Gamma
--------------------------------------------------------------------------------
Note (2): For sources detected in one band but with a very weak signal in the
other, we flag the flux value with a < symbol.
Note (3): For any source detected in one band but with a very weak signal in
the other, the background-subtracted flux could be negative. In this
case, only the upper Poisson error is quoted.
Note (4): Using the approximations from Gehrels (1986). They do not include the
uncertainty in the flux conversion factor; however, the errors are
generally dominated by the Poisson errors.
Note (5): For sources with a very weak signal in the 0.5-2keV (2-8keV) band,
we flag the HR value with a > (<) symbol.
Note (6): HR=C(2-8keV)/C(0.5-2keV) where C(2-8keV) and C(0.5-2keV) are
the count rates in the given bands. For sources with a very weak
signal in the 0.5-2keV (2-8keV) band, we list the lower
(upper) limit.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- CLANS Identification number (in RA order)
5- 10 F6.2 ct n0.5-2 Net 0.5-2 keV counts (2)
12- 16 F5.2 ct e_n0.5-2 1σ Poisson lower error in n0.5-2 (3)
18- 22 F5.2 ct E_n0.5-2 1σ Poisson upper error in n0.5-2 (3)
24- 29 F6.2 ct n2-8 Net 2-8 keV counts (2)
31- 35 F5.2 ct e_n2-8 1σ Poisson lower error in n2-8 (3)
37- 41 F5.2 ct E_n2-8 1σ Poisson upper error in n2-8 (3)
43- 49 F7.2 ct n0.5-8 Net 5-8 counts (2)
51- 55 F5.2 ct e_n0.5-8 1σ Poisson lower error in n0.5-8 (3)
57- 61 F5.2 ct E_n0.5-8 1σ Poisson upper error in n0.5-8 (3)
63- 66 F4.2 10+4s t0.5-2 Effective 0.5-2 exposure time
68- 71 F4.2 10+4s t2-8 Effective 2-8 exposure time
73- 76 F4.2 10+4s t0.5-8 Effective 0.5-8 exposure time
78- 81 F4.1 arcmin R Source distance from pointing center
--------------------------------------------------------------------------------
Note (2): The eight-piece segmented annulus region we use to estimate the
background for each source is four times as large as the source cell
area. Therefore, the net counts for the majority of the sources are
multiples of 0.25. For a few sources we exclude background segments
containing more counts than the 3σ Poisson upper limit in order
to avoid nearby sources. Therefore the net counts for these sources
are not multiples of 0.25.
Note (3): Using the approximations from Gehrels (1986).
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table11.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- CLANS Identification number (in RA order)
5- 11 F7.3 deg RAodeg ?=-99 Opt/NIR Right Ascension in decimal degrees
(J2000)
13- 19 F7.3 deg DEodeg ?=-99 Opt/NIR Declination in decimal degrees
(J2000)
21- 26 F6.2 mag g'mag ?=-99 g' band AB magnitude (2)
28- 33 F6.2 mag r'mag ?=-99 r' band AB magnitude (2)
35- 40 F6.2 mag i'mag ?=-99 i' band AB magnitude (2)
42- 47 F6.2 mag z'mag ?=-99 z' band AB magnitude (2)
49- 54 F6.2 mag Jmag ?=-99 J band AB magnitude (2)
56- 61 F6.2 mag Hmag ?=-99 H band AB magnitude (2)
63- 68 F6.2 mag Kmag ?=-99 K band AB magnitude (2)
70- 75 F6.2 mag 3.6mag ?=-99 Spitzer 3.6µm band AB magnitude (2)
77- 82 F6.2 mag 24mag ?=-99 Spitzer 24µm band AB magnitude (2)
84- 88 F5.2 --- zsp ?=- Spectroscopic redshift (G3)
90- 95 F6.2 --- zph ?=- Photometric redshift (G2)
97- 99 I3 --- Cl ?=- Optical spectral classification (G1)
--------------------------------------------------------------------------------
Note (2): Typical photometric uncertainties are given in Section 3.6.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table1[23].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Seq Identification number (1)
5- 11 F7.3 deg RAdeg ?=-99 Opt/NIR Right Ascension in decimal
degrees (J2000)
13- 19 F7.3 deg DEdeg ?=-99 Opt/NIR Declination in decimal degrees
(J2000)
21- 25 F5.1 mag Umag ? U band AB magnitude, for table 13 (2)
27- 32 F6.2 mag umag ? u band AB magnitude, for table 12 (2)
34- 39 F6.2 mag Bmag ? B band AB magnitude (2)
41- 46 F6.2 mag g'mag ? g' band AB magnitude, for table 12 (2)
48- 53 F6.2 mag Vmag ? V band AB magnitude (2)
55- 60 F6.2 mag Rmag ? R band AB magnitude (2)
62- 67 F6.2 mag i'mag ? i' band AB magnitude, for table 12 (2)
69- 73 F5.1 mag Imag ? I band AB magnitude, for table 13 (2)
75- 80 F6.2 mag z'mag ? z' band AB magnitude (2)
82- 87 F6.2 mag Jmag ? J band AB magnitude (2)
89- 94 F6.2 mag Hmag ? H band AB magnitude (2)
96-101 F6.2 mag Kmag ? K band AB magnitude (2), (3)
103-108 F6.2 mag 3.6mag ? Spitzer 3.6µm band AB magnitude (2)
110-115 F6.2 mag 24mag ? Spitzer 24µm band AB magnitude (2)
117-121 F5.2 --- zsp Spectroscopic redshift (G3)
123 A1 --- r_zsp [a-s] Reference for zsp (5)
125-130 F6.2 --- zph Photometric redshift (G2)
132-134 I3 --- Cl Optical spectral classification (G1)
--------------------------------------------------------------------------------
Note (1): Nomenclature note:
* in Table12: CLASXS NNN, corresponds to objects in
Tables 2 and 3 of Yang et al. (2004, Cat. J/AJ/128/1501)
* in Table13: CDFN NNN, corresponds to objects in Table A1 of
Barger et al. (2003, Cat. J/AJ/126/632), [ABB2003] CDFN NNN in Simbad
Note (2): Typical photometric uncertainties are given in Section 3.6.
-99.000 = Not detected (2σ significance).
Note (3): K band magnitude for table 12 but Ks band magnitude for table 13.
Note (5): References as follows:
a = Barger et al., 2003AJ....126..632B 2003AJ....126..632B, Cat. J/AJ/126/632
b = Swinbank et al., 2004ApJ...617...64S 2004ApJ...617...64S
c = Chapman et al., 2005ApJ...622..772C 2005ApJ...622..772C, Cat. J/ApJ/622/772
d = Reddy et al., 2006ApJ...653.1004R 2006ApJ...653.1004R, Cat. J/ApJ/653/1004
s = Steffen et al., 2004AJ....128.1483S 2004AJ....128.1483S, Cat. J/AJ/128/1483
All other spectroscopic redshifts presented here for the first time.
--------------------------------------------------------------------------------
Global Notes:
Note (G1): Spectral classification as follows:
0 = absorbers
1 = star formers
3 = high-excitation sources
4 = broad-line AGNs
-1 = source is not yet spectroscopically observed
-2 = source is a star
10 = spectroscopic redshift from the literature
without a corresponding spectrum
-99 = no classification
Note (G2): Photometric redshift determined with our template-fitting
technique; negative values are:
-3 = source has a spectroscopic redshift;
-99 = source has neither a spectroscopic nor a photometric redshift.
Note (G3): Special value significations:
-0.00 = with corresponding class = -99, indicates source is spectroscopically
observed but neither the redshift nor the class could be identified.
-1.00 = with corresponding class = -1, indicates source is not yet
spectroscopically observed.
-2.00 = with corresponding class = -2, indicates source is a star.
>0.00 = with corresponding class = 10, indicates spectroscopic redshift from
the literature without a corresponding spectrum.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
Yencho et al., Paper II. 2009ApJ...698..380Y 2009ApJ...698..380Y
Trouille et al., Paper III. 2009ApJ...703.2160T 2009ApJ...703.2160T Cat. J/ApJ/703/2160
Trouille & Barger Paper IV. 2010ApJ...722..212T 2010ApJ...722..212T
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 29-Jul-2009