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V/151               VANDELS High-Redshift Galaxy Evolution       (McLure+, 2017)

VANDELS High-Redshift Galaxy Evolution: Spectroscopic and Photometric Redshifts in the CANDELS UDS and CDFS Fields McLure R., Pentericci L., VANDELS Team <The Messenger, vol. 167, 31-35 (2017)> =2017Msngr.167...31M =2017yCat.5151....0M
ADC_Keywords: Surveys ; Photometry, SDSS ; Photometry, infrared ; Redshifts Mission_Name: ESO Abstract: VANDELS is a new ESO spectroscopic Public Survey targeting the high-redshift Universe. Exploiting the red sensitivity of the refurbished VIMOS spectrograph, the survey is obtaining ultra-deep optical spectroscopy of around 2100 galaxies in the redshift interval 1.0<z<7.0, with 85% of its targets selected to be at z≥3. The fundamental aim of the survey is to provide the high signal-to-noise spectra necessary to measure key physical properties such as stellar population ages, metallicities and outflow velocities from detailed absorption-line studies. By targeting two extragalactic survey fields with superb multi-wavelength imaging data, VANDELS will produce a unique legacy dataset for exploring the physics underpinning high-redshift galaxy evolution. Description: This is the first data release (DR1) of the VANDELS survey, an ESO public spectroscopy survey targeting the high-redshift Universe. The VANDELS survey uses the VIMOS spectrograph on ESO's VLT to obtain ultra-deep, medium resolution, optical spectra of galaxies within the UKIDSS Ultra Deep Survey (UDS) and Chandra Deep Field South (CDFS) survey fields (0.2 sq. degree total area). Using robust photometric redshift pre-selection, VANDELS is targeting ∼2100 galaxies in the redshift interval 1.0<z<7.0, with 85% of its targets selected to be at z≥3. In addition, VANDELS is targeting a substantial number of passive galaxies in the redshift interval 1.0<z<2.5. Exploiting the red sensitivity of the refurbished VIMOS spectrograph, the survey is obtaining ultra-deep optical spectroscopy with the VIMOS MR grism and GG475 order-sorting filter, which covers the wavelength range 4800-10000Å at a dispersion of 2.5Å/pix and a spectral resolution of R∼600. Each galaxy receives between a minimum of 20-hours and a maximum of 80-hours of on-source integration time. The fundamental aim of the survey is to provide the high signal-to-noise spectra necessary to measure key physical properties such as stellar population ages, metallicities and outflow velocities from detailed absorption-line studies. By targeting two extra-galactic survey fields with superb multi-wavelength imaging data, VANDELS is designed to produce a unique legacy dataset for exploring the physics underpinning high-redshift galaxy evolution. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file cdfs.dat 162 415 VANDELS CDFS field uds.dat 162 464 VANDELS UDS field
See also: II/253 : Chandra Deep Field South: multi-colour data (Wolf+, 2008) J/A+A/377/442 : Chandra Deep Field South: R-band photometry (Wolf+, 2001) II/258 : Hubble Ultra Deep Field Catalog (UDF) (STScI, 2004) J/AJ/132/1729 : Hubble Ultra Deep Field BVI-dropout sources (Beckwith+, 2006) Byte-by-byte Description of file: cdfs.dat uds.dat
Bytes Format Units Label Explanations
1- 19 A19 --- Id VANDELS object name (id) (1) 21- 29 F9.5 deg RAdeg Right ascension (J2000) (alpha) 31- 39 F9.5 deg DEdeg Declination (J2000) (delta) 41- 47 F7.4 mg imag ? i (AB) selection magnitude (i_AB) 49- 60 A12 --- iFilt i (AB) selection magnitude filter (i_FILTER)(2) 62- 68 F7.4 mg zmag ? z (AB) selection magnitude (z_AB) 70- 79 A10 --- zFilt z (AB) selection magnitude filter (z_FILTER)(3) 81- 87 F7.4 mg Hmag ? H (AB) selection magnitude (H_AB) 89- 97 A9 --- HFilt H (AB) selection magnitude filter (H_FILTER)(4) 99-104 I6 s Schedtime Total requested exposure time (t_schedtime) 106-119 F14.7 s Exptime Current total exposure time (t_exptime) 121-127 F7.5 --- zph Photometric redshift (zphot) 129-134 F6.4 --- zsp ? Spectroscopic redshift (zspec) 136-137 I2 --- q_zsp ? Spectroscopic redshift quality flag (zflg) (5) 139-162 A24 --- FileName FITS file name of the original spectrum (FILENAME)
Note (1): VANDELSCDFSNNNNNN for CDFS field, VANDELSUDSNNNNNN for UDF field. Note (2): HST_F775W and SUBARU_IA738 for CDFS field, SUBARU_i' for UDF field. Note (3): HST_F850LP for CDFS field, SUBARU_z' for CDFS field. Note (4): HST_F160W and VISTA_H for CDFS field, HST_F160W and WFCAM_H for UDF field. Note (5): Spectroscopic redshift quality flag as follows: 0 = no redshift could be assigned 1 = 50% probability to be correct 2 = 75% probability to be correct 3 = 95% probability to be correct 4 = 100% probability to be correct 9 = spectrum with a single emission line. The redshift given is the most probable given the observed continuum, it has a >80% probability to be correct 14 = 100% probability to be correct from AGN spectrum
History: Copied at http://www.eso.org/qi/catalog/show/212
(End) Patricia Vannier [CDS] 21-Nov-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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