J/ApJS/161/21 Extended Chandra Deep Field-South survey (Lehmer+, 2005)
The Extended Chandra Deep Field-South survey: Chandra point-source catalogs.
Lehmer B.D., Brandt W.N., Alexander D.M., Bauer F.E., Schneider D.P.,
Tozzi P., Bergeron J., Garmire G.P., Giacconi R., Gilli R., Hasinger G.,
Hornschemeier A.E., Koekemoer A.M., Mainieri V., Miyaji T., Nonino M.,
Rosati P., Silverman J.D., Szokoly G., Vignali C.
<Astrophys. J. Suppl. Ser., 161, 21-40 (2005)>
=2005ApJS..161...21L 2005ApJS..161...21L
ADC_Keywords: X-ray sources ; Active gal. nuclei
Keywords: cosmology: observations - diffuse radiation - galaxies: active -
surveys - X-rays
Abstract:
We present Chandra point-source catalogs for the Extended Chandra Deep
Field-South (E-CDF-S) survey. The E-CDF-S consists of four contiguous
250ks Chandra observations covering an approximately square region of
total solid angle ∼0.3°2, which flank the existing ∼1Ms Chandra
Deep Field-South (CDF-S). The survey reaches sensitivity limits of
∼1.1x10-16 and ∼6.7x10-16ergs/cm2/s for the 0.5-2.0 and 2-8keV
bands, respectively. We detect 762 distinct X-ray point sources within
the E-CDF-S exposure; 589 of these sources are new (i.e., not
previously detected in the ∼1Ms CDF-S). This brings the total number
of X-ray point sources detected in the E-CDF-S region to 915 (via the
E-CDF-S and ∼1Ms CDF-S observations). Source positions are determined
using matched-filter and centroiding techniques; the median positional
uncertainty is ∼0.35". In addition to our main Chandra catalog, we
constructed a supplementary source catalog containing 33 lower
significance X-ray point sources that have bright optical counterparts
(R<23).
Description:
The entire Chandra observation program consisted of nine separate
Chandra observations taken between 2004 February 29 and November 20.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 333 762 Main Chandra catalog source properties
table3.dat 331 14 Main Chandra catalog cross-field source properties
table6.dat 329 33 Supplementary optically bright Chandra catalog
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See also:
B/chandra : The Chandra Archive Log (CXC, 1999-)
II/253 : Chandra Deep Field South: multi-colour data (Wolf+, 2004)
J/A+A/377/442 : Chandra Deep Field South: R-band photometry (Wolf+, 2001)
J/A+A/379/740 : ESO Imaging Survey (EIS) (Arnouts+, 2001)
J/A+A/403/493 : H-band observation of Chandra Deep Field South (Moy+, 2003)
J/A+A/428/1043 : Redshifts from VIMOS VLT Deep Survey (Le Fevre+, 2004)
J/AJ/126/539 : The Chandra Deep Fields North and South (Alexander+, 2003)
J/ApJ/554/742 : Chandra Deep Survey of the HDF-N (Hornschemeier+, 2001)
J/ApJ/595/685 : HST imaging in Chandra Deep Field-South (Grogin+, 2003)
J/ApJS/139/369 : Chandra Deep Field South. 1 Ms catalog (Giacconi+, 2002)
J/ApJS/155/271 : Chandra Deep Field-South: Optical spectroscopy
(Szokoly+, 2004)
J/MNRAS/356/568 : Deep Chandra survey of the Groth Strip (Nandra+, 2005)
Byte-by-byte Description of file: table2.dat table3.dat table6.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- [LBA2005] Source identification (1)
7 I1 h RAh Hour of Right Ascension (J2000)
9- 10 I2 min RAm Minute of Right Ascension (J2000)
12- 16 F5.2 s RAs Second of Right Ascension (J2000)
19 A1 --- DE- Sign of the Declination (J2000)
20- 21 I2 deg DEd Degree of Declination (J2000)
23- 24 I2 arcmin DEm Arcminute of Declination (J2000)
26- 29 F4.1 arcsec DEs Arcsecond of Declination (J2000)
32- 35 F4.1 arcsec e_pos Positional error
37- 40 F4.1 arcmin OffAxis Off-axis angle
42- 50 F9.2 ct FCts Full-band counts
52- 57 F6.2 ct E_FCts ?=-1.00 Error in FCts (upper limit) (2)
59- 64 F6.2 ct e_FCts ?=-1.00 Error in FCts (lower limit) (2)
66- 73 F8.2 ct SCts Soft-band counts
75- 80 F6.2 ct E_SCts ?=-1.00 Error in SCts (upper limit) (2)
82- 87 F6.2 ct e_SCts ?=-1.00 Error in SCts (lower limit) (2)
89- 96 F8.2 ct HCts Hard-band counts
98-103 F6.2 ct E_HCts ?=-1.00 Error in HCts (upper limit) (2)
105-110 F6.2 ct e_HCts ?=-1.00 Error in HCts (lower limit) (2)
114 I1 h RAOh ? Optical Hour of Right Ascension (J2000)
116-117 I2 min RAOm ? Optical Minute of Right Ascension (J2000)
119-123 F5.2 s RAOs ? Optical Second of Right Ascension (J2000)
126 A1 --- DEO- ? Sign of the Optical Declination (J2000)
127-128 I2 deg DEOd ? Optical Degree of Declination (J2000)
130-131 I2 arcmin DEOm ? Optical Arcminute of Declination (J2000)
133-136 F4.1 arcsec DEOs ? Optical Arcsecond of Declination (J2000)
140-143 F4.2 arcsec O-XOff Offset between optical and X-ray positions
145-149 F5.2 mag Rcmag ?=0.00 The Cousins R band magnitude (WFI) (3)
153-155 I3 --- [ABB2003] ?=0 Alexander et al. (Cat. J/AJ/126/539,
A03) CDFS source identification (4)
159 I1 h RAAh ? A03 CDFS Hour of Right Ascension (J2000)
161-162 I2 min RAAm ? A03 CDFS Minute of Right Ascension (J2000)
164-168 F5.2 s RAAs ? A03 CDFS Second of Right Ascension (J2000)
171 A1 --- DEA- ? Sign of the A03 CDFS Declination (J2000)
172-173 I2 deg DEAd ? A03 CDFS Degree of Declination (J2000)
175-176 I2 arcmin DEAm ? A03 CDFS Arcminute of Declination (J2000)
178-181 F4.1 arcsec DEAs ? A03 CDFS Arcsecond of Declination (J2000)
184-186 I3 --- [GZW2002] ?=0 Giacconi et al. (Cat. J/ApJS/139/369,
G02) CDFS Source identification (4)
190 I1 h RAGh ? G02 CDFS Hour of Right Ascension (J2000)
192-193 I2 min RAGm ? G02 CDFS Minute of Right Ascension (J2000)
195-199 F5.2 s RAGs ? G02 CDFS Second of Right Ascension (J2000)
202 A1 --- DEG- ? Sign of the G02 CDFS Declination (J2000)
203-204 I2 deg DEGd ? G02 CDFS Degree of Declination (J2000)
206-207 I2 arcmin DEGm ? G02 CDFS Arcminute of Declination (J2000)
209-212 F4.1 arcsec DEGs ? G02 CDFS Arcsecond of Declination (J2000)
214-222 F9.2 s FTime Full-band effective exposure time
224-232 F9.2 s STime Soft-band effective exposure time
234-242 F9.2 s HTime Hard-band effective exposure time
244-251 F8.2 --- H/S ? Band ratio (HCts/SCts) (5)
253-258 F6.2 --- E_H/S ? Error in H/S (upper limit)
260-265 F6.2 --- e_H/S ? Error in H/S (lower limit)
267-271 F5.2 --- Gamma Photon index (5)
272 A1 --- l_Gamma [l] Limit flag on Gamma
273-277 F5.2 --- E_Gamma ? Photon index upper error
279-283 F5.2 --- e_Gamma ? Photon index lower error
286-294 E9.2 mW/m2 FFlux Full-band flux in units of erg/s/cm2 (6)
297-305 E9.2 mW/m2 SFlux Soft-band flux in units of erg/s/cm2 (6)
308-316 E9.2 mW/m2 HFlux Hard-band flux in units of erg/s/cm2 (6)
319-320 I2 --- Field ? The E-CDF-S Field identification
324-325 I2 [-] Log(P) ? Logarithm of the minimum false-positive
probability
329-333 A5 --- Notes Additional notes (7)
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Note (1): Source identification in Simbad is:
[LBA2005] NNN in tables 2 and 3,
[LBA2005] SNN in table 6.
Note (2): A -1.00 indicates an upper/lower limit.
Note (3): Note that objects with no optical counterparts have been set to 0.0.
Note (4): Note that sources without CDFS counterparts are listed as 0.
Note (5): Note that some are upper or lower limits. When the number of counts is
low, the photon index is poorly constrained and is set to Γ=1.4.
Note (6): A negative value indicates an upper limit.
Note (7): Additional notes, defined as follows:
D = a source detected in more than one of the four observational fields.
U = object lying in the UDF (see Figure 2).
G = object that was identified as a Galactic star through the optical
spectrophotometric COMBO-17 survey (Wolf et al. 2004, Cat. <II.253>).
O = object that has a large cross-band (i.e., between the three standard
bands) positional offsets (>2"); all of these sources lie at off-axis
angles of >8'.
M = source where the photometry was performed manually.
S = close-double or close-triple source where manual separation was
required.
C = source detected within the boundary of the ∼1Ms CDF-S exposure that
have no A03 (Alexander et al., Cat. J/AJ/126/539) or G02 (Giacconi et
al., Cat. J/ApJS/139/369) counterparts. Several of these sources are
located in low-sensitivity regions of the ∼1 Ms CDF-S, and a few of
these sources may be variable. For further explanation of many of these
notes, see the text in section 3.3.1.
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History:
* 08-Jun-2006: From electronic version of the journal
* 27-Jun-2008: Source identification in table 6 modified
(the 'S' was explicitely added)
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 08-Jun-2006