J/A+A/434/53 GOODS-South Field redshifts (Vanzella+, 2005)
The Great Observatories Origins Deep Survey VLT/FORS2 Spectroscopy in the
GOODS-South Field.
Vanzella E., Cristiani S., Dickinson M., Kuntschner H., Moustakas L.A.,
Nonino M., Rosati P., Stern D., Cesarsky C., Ettori S., Ferguson H.C.,
Fosbury R.A.E., Giavalisco M., Haase J., Renzini A., Rettura A., Serra P.
<Astron. Astrophys. 434, 53 (2005)>
=2005A&A...434...53V 2005A&A...434...53V
ADC_Keywords: Galaxies, spectra ; Redshifts ; Photometry, infrared
Keywords: cosmology: observations -
cosmology: large scale structure of the universe - galaxies: evolution
Abstract:
We present the first results of the ESO/GOODS program of spectroscopy
of faint galaxies in the Chandra Deep Field South (CDF-S). 399 spectra
of 303 unique targets have been obtained in service mode with the
FORS2 spectrograph at the ESO/VLT, providing 234 redshift
determinations (the median of the redshift distribution is at 1.04).
The typical redshift uncertainty is estimated to be sigmaz∼0.001.
Galaxies have been color selected in a way that the resulting redshift
distribution typically spans from z=0.5 to 2.
The reduced spectra and the derived redshifts are released to the
community through the ESO web page http://www.eso.org/science/goods/
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 91 301 The spectroscopic catalogue
table2.fit 2880 13 FITS version of table2
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See also:
J/ApJ/600/L99 : Colours of z∼6 galaxies in GOODS (Dickinson+, 2004)
http://www.stsci.edu/ftp/science/goods : GOODS HomePage
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [GDS]
5- 23 A19 --- GDS GOODS South name, based on the GOODS v1.0
astrometry, JHHMMSS.ss+DDMMSS.s
25- 29 F5.2 mag zmag ? z magnitude in AB system
31- 35 F5.2 mag i-z ? i-z colour index in AB system
37- 41 F5.3 --- zspec ? Spectroscopic redshift
43- 46 A4 --- Class Classification (1)
48 A1 --- Qual [ABCX] Quality flag (2)
50- 87 A38 --- Comm Comments related to the observation (3)
89- 90 I2 --- Cat Category of the observation (4)
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Note (1): Groups the objects for which emission line(s) (em.),
absorption-line(s) (abs.) or both (comp.) are detected in the
spectrum. The classification has been guided by the observed continuum
level and slope blueward and redward of the emission/absorption
feature, by the broad-band colors and the morphology of the targets.
Note (2): Quality flag, indicates the reliability of the redshift determination.
A = solid redshift determination (150 objects)
B = likely redshift determination (57 objects)
C = tentative redshift determination (27 objects)
X = an inconclusive spectrum or three cases in which no extraction
was possible (69 objects)
Note (3): The column contains additional information relevant to the
particular observation. The most common ones summarize the
identification of the principal lines, the inclination of an emission
line due to internal kinematics, the weakness of the signal ("faint"),
the low S/N of the extracted spectrum ("noisy"), the 20% light radius
("Flux-radius" in ACS pixels) for objects classified as stars, etc.
Note (4): Category (described in Sect. 2) is numbered as follows:
1 = primary catalog
2 = secondary catalog
3 = photometric redshift sample
4 = i775-dropout and V606-dropout
5 = miscellaneous objects
-1 = the serendipitously identified sources
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Acknowledgements: Vanzella Eros, vanzella(at)ts.astro.it
(End) Vanzella Eros [Trieste Astron. Obs.], Patricia Vannier [CDS] 28-Dec-2004