II/253A Chandra Deep Field South: multi-colour data (Wolf+, 2008)
A catalogue of the Chandra Deep Field South with multi-colour classification
and photometric redshifts from COMBO-17.
Wolf C., Meisenheimer K., Kleinheinrich M., Borch A., Dye S., Gray M.,
Wisotzki L., Bell E.F., Rix H.-W., Cimatti A., Hasinger G., Szokoly G.
<Astron. Astrophys., 421, 913-936 (2004)>
=2004A&A...421..913W 2004A&A...421..913W
=2008A&A...492..933W 2008A&A...492..933W
ADC_Keywords: Surveys ; Regional catalog ; Photometry, CCD ; Magnitudes ;
Galaxies, photometry
Keywords: catalogs - surveys - techniques: photometric -
methods: observational - galaxies: general
Description:
Table 3 contains the object catalogue of the COMBO-17 CDFS field. The
observations were carried out with the Wide Field Imager (WFI) at the
MPG/ESO 2.2-m telescope on La Silla, Chile, between October 1999 and
January 2001 in four independent observing runs. The field measures
31.5'x30', is centered on RA=03:32:25, DE=-27:48:50 and contains the
Chandra Deep Field South. The table contains 63501 objects found on
the deep R-band image cdfs_r.fit by SExtractor with S/N>3. The 5-σ
magnitude limit for point sources is Rmag=26.0. Morphological
information from the SExtractor measurement is included. Multiple
observations in different observing runs of six different filters
allow the identification of variable objects. The table contains
positions, flags and flux measurements in UBVRI and 12 optical
medium-band filters. In addition, we include multi-colour
classification, photometric redshifts, luminosity distances and a
number of absolute restframe magnitudes in different filters (Johnson,
Sloan, Bessell).
cdfs_u.fit, cdfs_b.fit, cdfs_v.fit, cdfs_r.fit and cdfs_i.fit are
coadded sumframes in UBVRI of the CDFS field. These sumframes are
stacked from flat-fielded and cosmic-corrected individual images by
applying only full pixel shifts. Therefore, the coordinate frames
differ slightly between the images. The coordinates in Table 3 refer
to image cdfs_r.fit. The images in BVRI are obtained from observations
carried out in observing run D (Oct 1999, see also Note (11) in the
byte-by-byte description of table3.dat) while the U-band image is
obtained from observing run G (Jan 2001). The exposure times are
14400s (U), 5000s (B), 8400s (V), 15000s (R) and 7550s (I). The
intensity levels are given in units of photons hitting the detector
(already corrected for the gain of the CCD).
The data included here supersede the table2.dat of the COMBO-17
published in 2001 (J/A+A/377/442)
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 997 63501 *Multi-colour data, classification and photometric
redshifts in a 31.5'x30' field around the
Chandra Deep Field South
cdfs_u.fit 2880 83874 U-band image of the COMBO-17 CDFS field
cdfs_b.fit 2880 83874 B-band image of the COMBO-17 CDFS field
cdfs_v.fit 2880 83874 V-band image of the COMBO-17 CDFS field
cdfs_r.fit 2880 83874 R-band image of the COMBO-17 CDFS field
cdfs_i.fit 2880 83874 I-band image of the COMBO-17 CDFS field
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Note on table3.dat: the COMBO-17 filters are, in central/width nm:
365±36(U) 458±97(B) 538±89(V) 648±160(R) 857±147(I)
418±27 462±13 486±31 519±16 572±25
605±21 645±30 696±21 753±18 816±21
857±15 914±26
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See also:
J/A+A/377/442 : Chandra Deep Field South: R-band photometry (Wolf+, 2001)
(superseded version)
J/A+A/392/741 : Stellar Catalogue in the Chandra DFS (Groenewegen+ 2002)
J/A+A/403/493 : H-band observation of Chandra Deep Field South (Moy+, 2003)
J/AJ/126/539 : The Chandra Deep Fields North and South (Alexander+, 2003)
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)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Seq Sequential number (unique object ID)
7- 8 I2 h RAh Right ascension (J2000)
10- 11 I2 min RAm Right ascension (J2000)
13- 18 F6.3 s RAs Right ascension (J2000) (1)
20 A1 --- DE- Declination sign (J2000)
21- 22 I2 deg DEd Declination (J2000)
24- 25 I2 arcmin DEm Declination (J2000)
27- 31 F5.2 arcsec DEs Declination (J2000) (1)
33- 39 F7.2 pix Xpos x-coordinate on image cdfs_r.fit
41- 47 F7.2 pix Ypos y-coordinate on image cdfs_r.fit
49- 54 F6.3 mag Rmag Total magnitude in R
56- 60 F5.3 mag e_Rmag Mean error (1-σ) of Rmag
62- 67 F6.3 mag ApRmag ? Aperture magnitude in R
69- 75 F7.3 mag ApDRmag ? Aperture difference of Rmag (2)
77- 82 F6.3 mag/arcsec2 mumax Central surface brightness in Rmag
84- 89 F6.2 arcsec MajAxis ? Major axis (3)
91- 96 F6.2 arcsec MinAxis ? Minor axis (3)
98-102 F5.3 deg PA ? Position angle, measured West to North
104-107 I4 --- Phot Flags on photometry (4)
109 I1 --- Var Variability flag (0=not variable)(5)
111-115 F5.3 --- Stel ? Stellarity index from SExtractor
(0 for galaxy, 1 for star)
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Classification Results
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117-131 A15 --- MCclass Multi-colour class (6)
133-137 F5.3 --- MCz ? Mean redshift in distribution of p(z)
139-143 F5.3 --- e_MCz ? Mean error (1-σ) of MCz
145-149 F5.3 --- MCz2 ? Alternative redshift if p(z) bimodal
151-155 F5.3 --- e_MCz2 ? Mean error (1-σ) of MCz2
157-161 F5.3 --- MCzml ? Peak of redshift distribution p(z)
163-169 F7.1 Mpc dl ? Luminosity distance of MCz (7)
171-177 F7.2 --- chi2red Reduced Chi^2 of best-fitting template
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Total object restframe luminosities
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179-184 F6.2 mag UjMAG ? Absolute Magnitude in Johnson U (8)
186-192 F7.2 mag e_UjMAG ? Mean error (1-σ) of UjMag
194-199 F6.2 mag BjMAG ? Absolute Magnitude in Johnson B (8)
201-207 F7.2 mag e_BjMAG ? Mean error (1-σ) of BjMag
209-214 F6.2 mag VjMAG ? Absolute Magnitude in Johnson V (8)
216-222 F7.2 mag e_VjMAG ? Mean error (1-σ) of VjMag
224-229 F6.2 mag usMAG ? Absolute Magnitude in SDSS u (8)
231-237 F7.2 mag e_usMAG ? Mean error (1-σ) of usMag
239-244 F6.2 mag gsMAG ? Absolute Magnitude in SDSS g (8)
246-252 F7.2 mag e_gsMAG ? Mean error (1-σ) of gsMag
254-259 F6.2 mag rsMAG ? Absolute Magnitude in SDSS r (8)
261-267 F7.2 mag e_rsMAG ? Mean error (1-σ) of rsMag
269-274 F6.2 mag UbMAG ? Absolute Magnitude in Bessell U (8)
276-280 F5.2 mag e_UbMAG ? Mean error (1-σ) of UbMag
282-287 F6.2 mag BbMAG ? Absolute Magnitude in Bessell B (8)
289-295 F7.2 mag e_BbMAG ? Mean error (1-σ) of BbMag
297-302 F6.2 mag VbMAG ? Absolute Magnitude in Bessell V (8)
304-310 F7.2 mag e_VbMAG ? Mean error (1-σ) of VbMag
312-317 F6.2 mag S280MAG ? Absolute Magnitue in 280/40nm (8)(9)
319-325 F7.2 mag e_S280MAG ? Mean error (1-σ) of S280Mag
327-332 F6.2 mag S145MAG ? Absolute Magnitude in 145/10nm (10)
334-337 F4.2 mag e_S145MAG ? Mean error (1-σ) of S145Mag
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Observed seeing-adaptive aperture fluxes
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339-348 E10.4 ct/m+2/s/nm W420FE ? Flux in filter 420/30nm in run E (11)
350-359 E10.4 ct/m+2/s/nm e_W420FE ? Mean error (1-σ) of W420FE
361-370 E10.4 ct/m+2/s/nm W462FE ? Flux in filter 462/14nm in run E (11)
372-381 E10.4 ct/m+2/s/nm e_W462FE ? Mean error (1-σ) of W462FE
383-392 E10.4 ct/m+2/s/nm W485FD ? Flux in filter 485/31nm in run D (11)
394-403 E10.4 ct/m+2/s/nm e_W485FD ? Mean error (1-σ) of W485FD
405-414 E10.4 ct/m+2/s/nm W518FE ? Flux in filter 518/16nm in run E (11)
416-425 E10.4 ct/m+2/s/nm e_W518FE ? Mean error (1-σ) of W518FE
427-436 E10.4 ct/m+2/s/nm W571FD ? Flux in filter 571/25nm in run D (11)
438-447 E10.4 ct/m+2/s/nm e_W571FD ? Mean error (1-σ) of W571FD
449-458 E10.4 ct/m+2/s/nm W571FE ? Flux in filter 571/25nm in run E (11)
460-469 E10.4 ct/m+2/s/nm e_W571FE ? Mean error (1-σ) of W571FE
471-480 E10.4 ct/m+2/s/nm W571FS ? Combined flux in filter 571/25nm(11)(12)
482-491 E10.4 ct/m+2/s/nm e_W571FS ? Mean error (1-σ) of W571FS
493-502 E10.4 ct/m+2/s/nm W604FE ? Flux in filter 604/21nm in run E (11)
504-513 E10.4 ct/m+2/s/nm e_W604FE ? Mean error (1-σ) of W604FE
515-524 E10.4 ct/m+2/s/nm W646FD ? Flux in filter 646/27nm in run D (11)
526-535 E10.4 ct/m+2/s/nm e_W646FD ? Mean error (1-σ) of W646FD
537-546 E10.4 ct/m+2/s/nm W696FE ? Flux in filter 696/20nm in run E (11)
548-557 E10.4 ct/m+2/s/nm e_W696FE ? Mean error (1-σ) of W696FE
559-568 E10.4 ct/m+2/s/nm W753FE ? Flux in filter 753/18nm in run E (11)
570-579 E10.4 ct/m+2/s/nm e_W753FE ? Mean error (1-σ) of W753FE
581-590 E10.4 ct/m+2/s/nm W815FE ? Flux in filter 815/20nm in run E (11)
592-601 E10.4 ct/m+2/s/nm e_W815FE ? Mean error (1-σ) of W815FE
603-612 E10.4 ct/m+2/s/nm W815FG ? Flux in filter 815/20nm in run G (11)
614-623 E10.4 ct/m+2/s/nm e_W815FG ? Mean error (1-σ) of W815FG
625-634 E10.4 ct/m+2/s/nm W815FS ? Combined flux in filter 815/20nm(11)(12)
636-645 E10.4 ct/m+2/s/nm e_W815FS ? Mean error (1-σ) of W815FS
647-656 E10.4 ct/m+2/s/nm W856FD ? Flux in filter 856/14nm in run D (11)
658-667 E10.4 ct/m+2/s/nm e_W856FD ? Mean error (1-σ) of W856FD
669-678 E10.4 ct/m+2/s/nm W914FD ? Flux in filter 914/27nm in run D (11)
680-689 E10.4 ct/m+2/s/nm e_W914FD ? Mean error (1-σ) of W914FD
691-700 E10.4 ct/m+2/s/nm W914FE ? Flux in filter 914/27nm in run E (11)
702-711 E10.4 ct/m+2/s/nm e_W914FE ? Mean error (1-σ) of W914FE
713-722 E10.4 ct/m+2/s/nm UFF ? Flux in filter U in run F (11)
724-733 E10.4 ct/m+2/s/nm e_UFF ? Mean error (1-σ) of UFF
735-744 E10.4 ct/m+2/s/nm UFG ? Flux in filter U in run G (11)
746-755 E10.4 ct/m+2/s/nm e_UFG ? Mean error (1-σ) of UFG
757-766 E10.4 ct/m+2/s/nm UFS ? Combined flux in filter U (11)(12)
768-777 E10.4 ct/m+2/s/nm e_UFS ? Mean error (1-σ) of UFS
779-788 E10.4 ct/m+2/s/nm BFD ? Flux in filter B in run D (11)
790-799 E10.4 ct/m+2/s/nm e_BFD ? Mean error (1-σ) of BFD
801-810 E10.4 ct/m+2/s/nm BFF ? Flux in filter B in run F (11)
812-821 E10.4 ct/m+2/s/nm e_BFF ? Mean error (1-σ) of BFF
823-832 E10.4 ct/m+2/s/nm BFS ? Combined flux in filter B (11)(12)
834-843 E10.4 ct/m+2/s/nm e_BFS ? Mean error (1-σ) of BFS
845-854 E10.4 ct/m+2/s/nm VFD ? Flux in filter V in run D (11)
856-865 E10.4 ct/m+2/s/nm e_VFD ? Mean error (1-σ) of VFD
867-876 E10.4 ct/m+2/s/nm RFD ? Flux in filter R in run D (11)
878-887 E10.4 ct/m+2/s/nm e_RFD ? Mean error (1-σ) of RFD
889-898 E10.4 ct/m+2/s/nm RFE ? Flux in filter R in run E (11)
900-909 E10.4 ct/m+2/s/nm e_RFE ? Mean error (1-σ) of RFE
911-920 E10.4 ct/m+2/s/nm RFF ? Flux in filter R in run F (11)
922-931 E10.4 ct/m+2/s/nm e_RFF ? Mean error (1-σ) of RFF
933-942 E10.4 ct/m+2/s/nm RFG ? Flux in filter R in run G (11)
944-953 E10.4 ct/m+2/s/nm e_RFG ? Mean error (1-σ) of RFG
955-964 E10.4 ct/m+2/s/nm RFS ? Combined flux in filter R (11)(12)
966-975 E10.4 ct/m+2/s/nm e_RFS ? Mean error (1-σ) of RFS
977-986 E10.4 ct/m+2/s/nm IFD ? Flux in filter I in run D (11)
988-997 E10.4 ct/m+2/s/nm e_IFD ? Mean error (1-σ) of IFD
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Note (1): Internal accuracy 0.15"
Note (2): Aperture difference on Rmag (=Rmag-ApRmag, zero for point sources)
Note (3): As observed in 1" seeing
Note (4): Flags to be read as bits (from right to left):
* bits 0-7 (corresponding to values 0-128) are original SExtractor flags,
* bits 9-11 (corresponding to values 512-2048) set by COMBO-17 photometry:
. bit 9 indicates only potential problem from bright neighbours or
reflexes from the optics (check images);
. bit 10 indicates uncorrected hot pixels,
. bit 11 is set interactively when photometry is erroneous
Note (5): Flag only set for objects which are detected with high S/N
and which show clear variability between different observing runs
(magnitude difference greater 0.15 mag, at least one magnitude has to
be measured with 10σ, difference has to be at least 6σ)
Note (6): Definition of classes:
Star = stars (colour of star, stellar shape),
WDwarf = WD/BHB/sdB star (colour of WD/BHB/sdB, stellar shape),
Galaxy = galaxies (colour of galaxy, shape irrelevant),
Galaxy (Star?) = most likely galaxy at z<0.15
(but overlap in colour space with stars),
Galaxy (Uncl!) = colour undecided (statistically almost always a galaxy),
QSO = QSOs (colour of QSO, stellar shape),
QSO (Gal?) = colour of QSOs, extended shape (usually Seyfert 1),
Strange Objects = very strange spectrum
(very unusual intrinsic spectrum or strong photometric
artifacts or uncorrected strong variability)
Note (7): H0=100km/s/Mpc, Ωm=0.3, ΩΛ=0.7
Note (8): Absolute restframe magnitude
calculated from redshifted best_fit template, depending on redshift
and filter extrapolation outside the COMBO-17 filter set can be
necessary, only calculated for objects classified as galaxies
Note (9): Synthetic UV continuum rectangular passband at 260-300nm
Note (10): Absolute restframe magnitude in a synthetic narrow
rectangular passband at 140-150nm calculated from redshifted best_fit
template, only calculated for objects classified as quasars.
Note (11): Coding of observing runs:
D = 1999-10-07 to 1999-10-22
E = 2000-01-28 to 2000-02-11
F = 2000-09-21 to 2000-09-30
G = 2001-01-19 to 2001-01-20
medium-band filters at the WFI are denoted by (central wavelength/FWHM)
The unit of the flux is photons per unit area, second and wavelength
interval, it is already corrected for the gain of the CCD
Note (12): Only applied to objects without variability flag
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Acknowledgements: Klaus Meisenheimer <meise(at)mpia-hd.mpg.de>
History:
* 26-Apr-2004: First Version
* 06-Sep-2004: The absolute magnitude in 145/10nm (S145MAG) and
its error (e_S145MAG) have been corrected; this absolute magnitude
exists only for quasars (176 objects in table3.dat).
* 13-Nov-2008: Updated version of table3 (from Martina Kleinheinrich)
(End) Martina Kleinheinrich [Max-Planck-Institut fuer Astronomie] 26-Apr-2004