J/A+A/vol/page UBgRIJKs photometry of 8753 objects in the FORS Deep Field Heidt+, 2003) ================================================================================ The FORS Deep Field: Field selection, photometric observations and photometric catalog Heidt J., Appenzeller I., Gabasch A., Jaeger K., Seitz S., et al. =2001A&A...VVV.ppppI (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Galaxies, optical ; Galaxies, photometry ; Morphology ; Photometry, CCD ; Keywords: methods: data analysis - catalogs - galaxies: general - galaxies: fundamental parameters - galaxies: photometry Abstract: The FORS Deep Field project is a multi-colour, multi-object spectroscopic investigation of a 7' times 7' region near the south galactic pole based mostly on observations carried out with the FORS instruments attached to the VLT telescopes. It includes the QSO Q 0103-260 (z = 3.36). The goal of this study is to improve our understanding of the formation and evolution of galaxies in the young Universe. In this paper the field selection, the photometric observations, and the data reduction are described. The source detection and photometry of objects in the FORS Deep Field is discussed in detail. A combined B and I selected UBgRIJKs photometric catalog of 8753 objects in the FDF is presented and its properties are briefly discussed. The formal 50% completeness limits for point sources, derived from the coadded images, are 25.64, 27.69, 26.86, 26.68, 26.37, 23.60 and 21.57 in U, B, g, R, I, J and Ks (Vega-system), respectively. A comparison of the number counts in the FORS Deep Field to those derived in other deep field surveys shows very good agreement. Description: Photometric and morphological parameters for 8753 objects (mostly galaxies) in the FORS Deep Field are presented. For each object we report the coordinates, total B and I magnitudes, aperture photometry within 2" in UBgRIJKs and morphological parameters (FWHM, elongation, PA and star-galaxy classification parameter from SExtractor). 3 flags are given, which gives information on blending of the objects (from SExtractor), if an object was detected on the B or I frame only and a preliminary classification of 35 point-like objects. Finally, weights for the determination of the total B and I magnitudes are given. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table4.dat 197 8753 Photometrical and morphological parameters for 8753 objects in the FORS Deep Field -------------------------------------------------------------------------------- Byte-by-byte Description of file: table4.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 6- 9 I4 --- ID Identification number 11- 11 I1 h RAh Right ascension (J2000) 14- 14 I1 min RAm Right ascension (J2000) 16- 20 F5.2 s RAs Right ascension (J2000) 22 A1 --- DE- Declination sign 23- 24 I2 deg DEd Declination (J2000) 26- 27 I2 arcmin DEm Declination (J2000) 29- 32 F4.1 arcsec DEs Declination (J2000) 34- 38 F5.2 mag m_BT Total Bessel B-magnitude 41- 44 F4.2 mag sigma_BT Error for m_BT 46- 50 F5.2 mag m_IT Total Bessel I-magnitude 53- 56 F4.2 mag sigma_IT Error for m_IT 58- 62 F5.2 mag m_U_2" Aperture-mag in Bessel U within 2" 65- 68 F4.2 mag sigma_U_2" Error for m_U_2" 70- 74 F5.2 mag m_B_2" Aperture-mag in Bessel B within 2" 77- 80 F4.2 mag sigma_B_2" Error for m_B_2" 82- 86 F5.2 mag m_g_2" Aperture-mag in Gunn g within 2" 89- 92 F4.2 mag sigma_g_2" Error for m_g_2" 94- 98 F5.2 mag m_R_2" Aperture-mag in Bessel R within 2" 101-104 F4.2 mag sigma_R_2" Error for m_R_2" 106-110 F5.2 mag m_I_2" Aperture-mag in Bessel I within 2" 113-116 F4.2 mag sigma_I_2" Error for m_I_2" 118-122 F5.2 mag m_J_2" Aperture-mag in J within 2" 125-128 F4.2 mag sigma_J_2" Error for m_J_2" 130-134 F5.2 mag m_Ks_2" Aperture-mag in Ks within 2" 137-140 F4.2 mag sigma_KS_2" Error for m_Ks_2" 143-147 F5.2 arcsec FWHM FWHM of objects 150-153 F4.2 --- Elong Elongation of objects 155-159 F5.1 deg PA Position angle of major axis 161-164 F4.2 --- Cstar Star-galaxy classification parameter 167-168 I2 --- Flag1 Sextractor flag (1) 170-174 A5 --- Flag2 Detection flag (2) 176-183 A8 --- Flag3 Classification flag (3) 186-190 F5.3 --- weight_B Weights for m_BT 193-197 F5.3 --- weight_I Weights for m_IT -------------------------------------------------------------------------------- Note (1): 1: Object has neigbours which may significantly bias m_BT or m_IT 2: Object is blended with another one 3: Sum of 1 + 2 4: At least one pixel is saturated or close to saturation 7: Sum of 1 + 2 + 4 8: Object is truncated (e.g. too close to image boundary) 16: Object aperture data are incomplete or corrupted 17: Sum of 1 + 16 18: Sum of 2 + 16 19: Sum of 1 + 2 + 16 24: Sum of 8 + 16 Note (2): Bonly: Object was only detected in B-band Ionly: Object was only detected in I-band Note (3): QSO/ G, M, K, L star -------------------------------------------------------------------------------- References: Heidt, Appenzeller, Bender, et al., 2001RvMA...14..209H The FORS Deep Field ================================================================================ (End) Jochen Heidt [LSW Heidelberg, Germany] 12-Dec-2002