J/MNRAS/385/1297 CENSORS spectroscopic observations (Brookes+, 2008)
A Combined EIS-NVSS Survey Of Radio Sources (CENSORS).
III. Spectroscopic observations.
Brookes M.H., Best P.N., Peacock J.A., Rottgering H.J.A., Dunlop J.S.
<Mon. Not. R. Astron. Soc., 385, 1297-1326 (2008)>
=2008MNRAS.385.1297B 2008MNRAS.385.1297B
ADC_Keywords: Surveys ; Radio sources ; Spectroscopy
Keywords: surveys - galaxies: active - radio continuum: galaxies -
galaxies: luminosity function, mass function
Abstract:
The Combined EIS-NVSS Survey Of Radio Sources (CENSORS) is a 1.4-GHz
radio survey selected from the NRAO VLA Sky Survey (NVSS) and complete
to a flux density of 7.2mJy. It targets the ESO Imaging Survey (EIS)
Patch D, which is a 3x2deg2 field centred on 09:51:36.0-21:00:00
(J2000). This paper presents the results of spectroscopic observations
of 143 of the 150 CENSORS sources. The primary motivation for these
observations is to achieve sufficient spectroscopic completeness so
that the sample may be used to investigate the evolution of radio
sources.
The observations result in secure spectroscopic redshifts for 63 per
cent of the sample and likely redshifts (based on a single emission
line, for example) for a further 8 per cent. Following the
identification of the quasars and star-forming galaxies in the CENSORS
sample, estimated redshifts are calculated for the remainder of the
sample via the K-z relation for radio galaxies.
Description:
The optically faintest sources (generally those which were only
detected in the K band) were targeted with FORS1 on the 8-m class ESO
Very Large Telescope (VLT), in 2002, 2003 and 2006, using a
1-1.5" slit. Further service mode observations were made in 2005
using the VLT and the William Herschel Telescope (WHT). A subset of
sources for which no redshift was obtained were targeted at redder
wavelengths with FORS2 in 2006.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 144 220 Results of spectroscopy observing for CENSORS
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See also:
J/MNRAS/346/627 : CENSORS (Combined EIS-NVSS Survey) catalog (Best+, 2003)
J/MNRAS/366/1265 : CENSORS infrared imaging (Brookes+, 2006)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- CENSORS [1/150] Sequential number
4 A1 --- n_CENSORS [*] * for Excluded from the sample
5- 6 I2 h RAh ? Right ascension (J2000)
8- 9 I2 min RAm ? Right ascension (J2000)
11- 15 F5.2 s RAs ? Right ascension (J2000)
17 A1 --- DE- Declination sign (J2000)
18- 19 I2 deg DEd ? Declination (J2000)
21- 22 I2 arcmin DEm ? Declination (J2000)
24- 28 F5.2 arcsec DEs ? Declination (J2000)
30- 36 A7 --- Run Run(s) (1)
38- 41 I4 s Exp ? Exposure time
42 A1 --- --- [,]
43- 46 I4 s Exp2 ? Second exposure time
48- 53 F6.1 deg PA [-36/180]? Slit position angle
54 A1 --- --- [,]
55- 60 F6.1 deg PA2 ? Second slit position angle
63- 74 A12 --- Line Line designation
76- 81 F6.1 0.1nm Lambda ? Observed wavelength
83- 88 F6.2 10-19W/m2 Flux ? Emission-line flux (10-16erg/s/cm2)
90- 95 F6.3 10-19W/m2 e_Flux ? rms uncertainty on Flux
97 A1 --- l_DVFWHM [~] Limit flag on DVFWHM
98-102 I5 km/s DVFWHM ? Line full width at half maximum
104-107 I4 km/s e_DVFWHM ? rms uncertainty on DVFWHM
109-111 I3 0.1nm EW ? Line equivalent width
113-115 I3 0.1nm e_EW ? rms uncertainty on EW
117-123 F7.5 --- z ? Redshift
124-125 A2 --- n_z [?s ] Note on z (2)
126-132 F7.5 --- e_z ? rms uncertainty on z
133-134 A2 --- l_zK [≥ ] Limit flag on zK
135-138 F4.2 --- zK ? Redshift estimated via the K-z relation
140-144 A5 --- Note Notes (3)
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Note (1): NED for data from NED (http://nedwww.ipac.caltech.edu/)
Note (2): Note on redshift as follows:
s = reasonably good single line redshift
? = uncertainty redshift
s? = single line redshift with less certainty
Note (3): Notes as follows:
N = here is a note on this target in the text
S = redshift is based upon spectroscopic measurements
I = redshift is based upon I magnitude
K = redshift is based upon K magnitude
KL = redshift is based upon K magnitude limit
SB = source was identified as a starburst
Q = source was identified as a quasar
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History:
* 07-May-2009: From electronic version of the journal
* 19-Oct-2009: One position corrected (CENSORS 30)
* 22-Oct-2009: Two positions corrected (CENSORS 72 and 134)
(End) Patricia Vannier [CDS] 31-Mar-2009