J/MNRAS/244/408 LDSS Deep Redshift Survey (Colless+ 1990)
The LDSS deep redshift survey
COLLESS M., ELLIS R.S., TAYLOR K., HOOK R.N.
<Mon. Not. R. Astron. Soc. 244, 408 (1990)>
=1990MNRAS.244..408C 1990MNRAS.244..408C
ADC_Keywords: Galaxies, optical; Regional catalog; Spectroscopy; Redshifts
Description:
Using a multisplit spectrograph, LDSS, we have obtained intermediate
dispersion spectroscopy for a new sample of 149 faint objects
selected randomly from the magnitude range 21≤bJ≤22.5 in three
high-latitude fields.
Table 1: Photographic plate material.
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Field RA (1950) Dec Plate Isophote Magnitude range
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00 hr 00 54 48.1 -27 54 45 J 1888 26.72 20.92≤bJ≤22.71
(SGP) 00 54 48.7 -27 54 04 F 1996 25.20
10hr 10 43 37.9 -00 04 48 J 1834 26.44 20.98≤bJ≤22.48
10 43 37.9 -00 04 48 F 1835 24.61
13hr 13 43 l4.0 -00 00 29 J l836 26.52 2l.00≤bJ≤22.44
13 43 14.0 -00 00 29 F 1837 24.82
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Table 2: Details of spectroscopic survey.
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Zone RA (1950) Dec Date Obs. Integ.(s) Sampling rate
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00.2 00 54 49.4 -27 43 53 23,24/10/87 20000 0.36 80%
10.2 10 43 55.4 +00 05 33 19/3/88 13500 0.25 87%
10.4 10 43 51.4 -00 06 41 22/3/88 12000 0.23 82%
13.2 13 41 57.3 +00 06 25 19,23/3/88 18000 0.23 73%
13.4 13 41 09.1 -00 00 16 22/3/88 11500 0.24 87%
13.5 13 41 08.8 +00 10 18 21/3/88 15000 0.24 74%
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Table 4: Mean redshifts and comparison with no-evolution model.
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Field N Confidence level
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00 hr 21 0.296 0.37
10 hr 29 0.302 0.74
13 hr 37 0.337 0.009
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All 87 0.312 0.016
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Note: Confidence level at which the observed n(z) is inconsistent
with the NE n(z)
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3 76 169 The catalogue
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Byte-per-byte Description of file: table3
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Bytes Format Units Label Explanations
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1- 7 A7 --- LDSS Designation in LDSS survey (1)
11- 12 I2 h RAh Right Ascension B1950 (hours)
14- 15 I2 min RAm Right Ascension B1950 (minutes)
17- 21 F5.2 s RAs Right Ascension B1950 (seconds)
23 A1 - DE- Declination B1950 (sign)
24- 25 I2 deg DEd Declination B1950 (degrees)
27- 28 I2 arcmin DEm Declination B1950 (minutes)
30- 33 F4.1 arcsec DEs Declination B1950 (seconds)
37- 41 F5.2 mag bJ [20.9/22.7] COSMOS photographic magnitude
44- 48 F5.2 mag bJ-rF [-0.5/3]? photographic colour index
53 A1 --- Class [sg] COSMOS star/galaxy classification
57- 61 F5.3 --- z [0/1]? Redshift
65 I1 --- q_Z [1/5] Redshift quality class (2)
69- 70 I2 0.1nm W [1/88]? Restframe equivalent width of
[O II] at 3727A
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Note (1): the ID in column 1 is f.z.#, where f is the R.A. number,
z is the zone number (Table 2) and # the object number
within the zone
Note (2): Qualities are:
=1: the most reliable redshifts
=2: based on a single feature (usually [OII] 3727 or CaH&K for
galaxies, MgI b band for stars)
=3: spectra for which no redshift could be ascertained
=4: spectra which were too distorted to extract
=5: survey sample objects for which no spectrum could be detected
History: keypunched at CDS
(End) James Marcout, Francois Ochsenbein [CDS] 20-Apr-1994