J/A+A/2004/0525 Chandra Deep Field South: multi-colour data (Wolf+, 2004) ================================================================================ 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. =2004A&A...xxx..xxxW ================================================================================ 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 31.5arcmin times 30arcmin, 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-sigma 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 flatfielded 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). File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table3.dat 992 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 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table3.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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 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 x x-coordinate on image cdfs_r.fit 41- 47 F7.2 pix y 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-sigma) of Rmag 62- 67 F6.3 mag Ap_Rmag ? aperture magnitude in R 69- 75 F7.3 mag ApD_Rmag ? aperture difference of Rmag (2) 77- 82 F6.3 mag mu_max 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_flag flags on photometry (4) 109 I1 --- var_flag variability flag (0=not variable)(5) 111-115 F5.3 --- stellarity ? stellarity index from SExtractor 117-131 A15 --- MC_class multi-colour class (6) 133-137 F5.3 --- MC_z ? mean redshift in distribution of p(z) 139-143 F5.3 --- e_MC_z ? mean error (1-sigma) of MC_z 145-149 F5.3 --- MC_z2 ? alternative redshift if p(z) bimodal 151-155 F5.3 --- e_MC_z2 ? mean error (1-sigma) of MC_z2 157-161 F5.3 --- MC_z_ml ? peak of redshift distribution p(z) 163-169 F7.1 Mpc dl ? luminosity distance of MC_z (7) 171-177 F7.2 --- chi2red reduced Chi^2 of best-fitting template 179-184 F6.2 mag UjMag ? Absolute Magnitude in Johnson U (8) 186-190 F5.2 mag e_UjMag ? mean error (1-sigma) of UjMag 192-197 F6.2 mag BjMag ? Absolute Magnitude in Johnson B (8) 199-205 F7.2 mag e_BjMag ? mean error (1-sigma) of BjMag 207-212 F6.2 mag VjMag ? Absolute Magnitude in Johnson V (8) 214-220 F7.2 mag e_VjMag ? mean error (1-sigma) of VjMag 222-227 F6.2 mag usMag ? Absolute Magnitude in SDSS u (8) 229-233 F5.2 mag e_usMag ? mean error (1-sigma) of usMag 235-240 F6.2 mag gsMag ? Absolute Magnitude in SDSS g (8) 242-248 F7.2 mag e_gsMag ? mean error (1-sigma) of gsMag 250-255 F6.2 mag rsMag ? Absolute Magnitude in SDSS r (8) 257-263 F7.2 mag e_rsMag ? mean error (1-sigma) of rsMag 265-270 F6.2 mag UbMag ? Absolute Magnitude in Bessell U (8) 272-276 F5.2 mag e_UbMag ? mean error (1-sigma) of UbMag 278-283 F6.2 mag BbMag ? Absolute Magnitude in Bessell B (8) 285-291 F7.2 mag e_BbMag ? mean error (1-sigma) of BbMag 293-298 F6.2 mag VbMag ? Absolute Magnitude in Bessell V (8) 300-306 F7.2 mag e_VbMag ? mean error (1-sigma) of VbMag 308-313 F6.2 mag S280Mag ? Absolute Magnitue in 280/40 (8)(9) 315-320 F6.2 mag e_S280Mag ? mean error (1-sigma) of S280Mag 322-327 F6.2 mag S145Mag ? Absolute Magnitude in 145/10 (10) 329-332 F4.2 mag e_S145Mag ? mean error (1-sigma) of S145Mag 334-343 E10.4 ct/m^2/s/nm W420F_E ? flux in filter 420/30 in run E (11) 345-354 E10.4 ct/m^2/s/nm e_W420F_E ? mean error (1-sigma) of W420F_E 356-365 E10.4 ct/m^2/s/nm W462F_E ? flux in filter 462/14 in run E (11) 367-376 E10.4 ct/m^2/s/nm e_W462F_E ? mean error (1-sigma) of W462F_E 378-387 E10.4 ct/m^2/s/nm W485F_D ? flux in filter 485/31 in run D (11) 389-398 E10.4 ct/m^2/s/nm e_W485F_D ? mean error (1-sigma) of W485F_D 400-409 E10.4 ct/m^2/s/nm W518F_E ? flux in filter 518/16 in run E (11) 411-420 E10.4 ct/m^2/s/nm e_W518F_E ? mean error (1-sigma) of W518F_E 422-431 E10.4 ct/m^2/s/nm W571F_D ? flux in filter 571/25 in run D (11) 433-442 E10.4 ct/m^2/s/nm e_W571F_D ? mean error (1-sigma) of W571F_D 444-453 E10.4 ct/m^2/s/nm W571F_E ? flux in filter 571/25 in run E (11) 455-464 E10.4 ct/m^2/s/nm e_W571F_E ? mean error (1-sigma) of W571F_E 466-475 E10.4 ct/m^2/s/nm W571F_S ? combined flux in filter 571/25(11)(12) 477-486 E10.4 ct/m^2/s/nm e_W571F_S ? mean error (1-sigma) of W571F_S 488-497 E10.4 ct/m^2/s/nm W604F_E ? flux in filter 604/21 in run E (11) 499-508 E10.4 ct/m^2/s/nm e_W604F_E ? mean error (1-sigma) of W604F_E 510-519 E10.4 ct/m^2/s/nm W646F_D ? flux in filter 646/27 in run D (11) 521-530 E10.4 ct/m^2/s/nm e_W646F_D ? mean error (1-sigma) of W646F_D 532-541 E10.4 ct/m^2/s/nm W696F_E ? flux in filter 696/20 in run E (11) 543-552 E10.4 ct/m^2/s/nm e_W696F_E ? mean error (1-sigma) of W696F_E 554-563 E10.4 ct/m^2/s/nm W753F_E ? flux in filter 753/18 in run E (11) 565-574 E10.4 ct/m^2/s/nm e_W753F_E ? mean error (1-sigma) of W753F_E 576-585 E10.4 ct/m^2/s/nm W815F_E ? flux in filter 815/20 in run E (11) 587-596 E10.4 ct/m^2/s/nm e_W815F_E ? mean error (1-sigma) of W815F_E 598-607 E10.4 ct/m^2/s/nm W815F_G ? flux in filter 815/20 in run G (11) 609-618 E10.4 ct/m^2/s/nm e_W815F_G ? mean error (1-sigma) of W815F_G 620-629 E10.4 ct/m^2/s/nm W815F_S ? combined flux in filter 815/20(11)(12) 631-640 E10.4 ct/m^2/s/nm e_W815F_S ? mean error (1-sigma) of W815F_S 642-651 E10.4 ct/m^2/s/nm W856F_D ? flux in filter 856/14 in run D (11) 653-662 E10.4 ct/m^2/s/nm e_W856F_D ? mean error (1-sigma) of W856F_D 664-673 E10.4 ct/m^2/s/nm W914F_D ? flux in filter 914/27 in run D (11) 675-684 E10.4 ct/m^2/s/nm e_W914F_D ? mean error (1-sigma) of W914F_D 686-695 E10.4 ct/m^2/s/nm W914F_E ? flux in filter 914/27 in run E (11) 697-706 E10.4 ct/m^2/s/nm e_W914F_E ? mean error (1-sigma) of W914F_E 708-717 E10.4 ct/m^2/s/nm UF_F ? flux in filter U in run F (11) 719-728 E10.4 ct/m^2/s/nm e_UF_F ? mean error (1-sigma) of UF_F 730-739 E10.4 ct/m^2/s/nm UF_G ? flux in filter U in run G (11) 741-750 E10.4 ct/m^2/s/nm e_UF_G ? mean error (1-sigma) of UF_G 752-761 E10.4 ct/m^2/s/nm UF_S ? combined flux in filter U (11)(12) 763-772 E10.4 ct/m^2/s/nm e_UF_S ? mean error (1-sigma) of UF_S 774-783 E10.4 ct/m^2/s/nm BF_D ? flux in filter B in run D (11) 785-794 E10.4 ct/m^2/s/nm e_BF_D ? mean error (1-sigma) of BF_D 796-805 E10.4 ct/m^2/s/nm BF_F ? flux in filter B in run F (11) 807-816 E10.4 ct/m^2/s/nm e_BF_F ? mean error (1-sigma) of BF_F 818-827 E10.4 ct/m^2/s/nm BF_S ? combined flux in filter B (11)(12) 829-838 E10.4 ct/m^2/s/nm e_BF_S ? mean error (1-sigma) of BF_S 840-849 E10.4 ct/m^2/s/nm VF_D ? flux in filter V in run D (11) 851-860 E10.4 ct/m^2/s/nm e_VF_D ? mean error (1-sigma) of VF_D 862-871 E10.4 ct/m^2/s/nm RF_D ? flux in filter R in run D (11) 873-882 E10.4 ct/m^2/s/nm e_RF_D ? mean error (1-sigma) of RF_D 884-893 E10.4 ct/m^2/s/nm RF_E ? flux in filter R in run E (11) 895-904 E10.4 ct/m^2/s/nm e_RF_E ? mean error (1-sigma) of RF_E 906-915 E10.4 ct/m^2/s/nm RF_F ? flux in filter R in run F (11) 917-926 E10.4 ct/m^2/s/nm e_RF_F ? mean error (1-sigma) of RF_F 928-937 E10.4 ct/m^2/s/nm RF_G ? flux in filter R in run G (11) 939-948 E10.4 ct/m^2/s/nm e_RF_G ? mean error (1-sigma) of RF_G 950-959 E10.4 ct/m^2/s/nm RF_S ? combined flux in filter R (11)(12) 961-970 E10.4 ct/m^2/s/nm e_RF_S ? mean error (1-sigma) of RF_S 972-981 E10.4 ct/m^2/s/nm IF_D ? flux in filter I in run D (11) 983-992 E10.4 ct/m^2/s/nm e_IF_D ? mean error (1-sigma) of IF_D -------------------------------------------------------------------------------- Note (1): Internal accuracy 0.15" Note (2): Aperture difference on Rmag (=Rmag-Ap_Rmag, zero for point sources) Note (3): as observed in 1" seeing Note (4): bit 0-7 (corresponding to values 0-128) are original SExtractor flags, bit 9-11 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 10 sigma, difference has to be at least 6 sigma) 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, Omega_m=0.3, Omega_Lambda=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 260-300 nm Note (10): Absolute restframe magnitude in a synthetic narrow rectangular passband at 140-150 nm calculated from redshifted best_fit template, only calculated for objects classified as quasars Note (11): Coding of observing runs: D = 07.10.-22.10.1999 E = 28.01.-11.02.2000 F = 21.09.-30.09.2000 G = 19.01.-20.01.2001 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 -------------------------------------------------------------------------------- Acknowledgements: Klaus Meisenheimer meise(at)mpia-hd.mpg.de ================================================================================ (End) Martina Kleinheinrich [Max-Planck-Institut fuer Astronomie] 22-Apr-2004