J/MNRAS/366/1265 CENSORS infrared imaging (Brookes+, 2006)
CENSORS: A Combined EIS-NVSS Survey of Radio Sources -
II. Infrared imaging and the K-z relation.
Brookes M.H., Best P.N., Rengelink R., Roettgering H.J.A.
<Mon. Not. R. Astron. Soc., 366, 1265-1288 (2006)>
=2006MNRAS.366.1265B 2006MNRAS.366.1265B
ADC_Keywords: Surveys ; Radio sources ; Photometry, infrared
Keywords: surveys - galaxies: active - radio continuum: galaxies
Abstract:
The Combined EIS-NVSS Survey of Radio Sources (CENSORS) is a 1.4-GHz
radio survey selected from the National Radio Astronomy Observatories
(NRAO) Very Large Array (VLA) Sky Survey (NVSS) and complete to a flux
density of 7.2mJy. It targets the European Southern Observatory (ESO)
Imaging Survey (EIS) Patch D, which is a 3x2°2 field centred on
right ascension 09:51:36.0 and declination 21:00:00 (J2000). This
paper presents K-band imaging of 142 of the 150 CENSORS sources. The
primary motivation for beginning infrared imaging of the sample was to
identify the host galaxies of ∼30 per cent of sources for which the
EIS I-band imaging failed to produce a likely candidate. In addition,
K-band magnitudes allow photometric redshift estimation and IK colours
aid the identification of host galaxies (which are typically old, red
ellipticals). Of the sources observed in the I and K bands, four
remain undetected, possibly indicating high redshifts for the host
galaxies, and eight involve complicated radio structures, or several
candidate host galaxies, which have yet to be resolved. Thus, the host
galaxy identifications are brought to 92 per cent completeness.
Description:
The K-band imaging of 142 of the 150 CENSORS sources was carried out
over several runs using UFTI on United Kingdom Infrared Telescope
(UKIRT) (2001, 2002), ISAAC on the Very Large Telescope (VLT) (2002)
and IRIS2 on the Anglo-Australian Telescope (AAT) (2003, 2004), the
latter three runs being done in service mode.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 38 6 Details of observing runs for K-band imaging
of CENSORS.
table2.dat 117 154 Details of K-band observations of CENSORS and
results.
table4.dat 35 77 Aperture-corrected K-band magnitudes for all
sources with a measured spectroscopic redshift
(presented in Paper 3, in prep.) and a K-band
detection.
notes.dat 80 123 Individual notes
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See also:
J/MNRAS/346/627 : CENSORS (Combined EIS-NVSS Survey) catalog (Best+, 2003)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 I1 --- Run Run number
2 A1 --- n_Run [*] Note on Run (1)
4- 24 A21 --- Dates Dates of observation
26- 30 A5 --- Tel Telescope name
32- 36 A5 --- Inst Instrument name
38 I1 --- Night Number of photometric nights
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Note (1): *: included in this data set are two observations made in
service mode: CENSORS 51 and 98 in 2002 November 27 and
2003 February 4, respectively.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- CENSORS CENSORS sequential number
4 A1 --- m_CENSORS [ABCDE] Muntiplicity index on CENSORS number
6- 8 I3 --- EISD EISD sequential number
10 I1 --- Run1 ? Observation run
11 A1 --- --- [,]
12 I1 --- Run2 ? Observation run
13 A1 --- --- [,]
14 I1 --- Run3 ? Observation run
16- 22 F7.2 s ExpTime1 ? Exposure time
23 A1 --- --- [,]
24- 27 I4 s ExpTime2 ? Exposure time
28 A1 --- --- [,]
29- 32 I4 s ExpTime3 ? Exposure time
34- 35 I2 h RAh ? Right ascension (J2000)
37- 38 I2 min RAm ? Right ascension (J2000)
40- 44 F5.2 s RAs ? Right ascension (J2000)
46 A1 --- DE- Declination sign (J2000)
47- 48 I2 deg DEd ? Declination (J2000)
50- 51 I2 arcmin DEm ? Declination (J2000)
53- 57 F5.2 arcsec DEs ? Declination (J2000)
59- 63 F5.2 mag Kmag1 ? K magnitude in aperture of radius 1arcsec
65- 67 F3.2 mag e_Kmag1 ? rms uncertainty on Kmag1
69- 73 F5.2 mag Kmag1.5 ? K magnitude in aperture of radius 1.5arcsec
75- 77 F3.2 mag e_Kmag1.5 ? rms uncertainty on Kmag1.5
79- 83 F5.2 mag Kmag2.5 ? K magnitude in aperture of radius 2.5arcsec
85- 87 F3.2 mag e_Kmag2.5 ? rms uncertainty on Kmag2.5
89- 93 F5.2 mag Kmag4.5 ? K magnitude in aperture of radius 4.5arcsec
95- 97 F3.2 mag e_Kmag4.5 ? rms uncertainty on Kmag4.5
99-103 F5.2 mag Kmago ? K magnitude in aperture of radius theta
105-107 F3.2 mag e_Kmago ? rms uncertainty on Kmago
108 A1 --- ---
109-111 A3 --- theta Radius for the Kmago aperture (0.5 or rec)
112 A1 --- ---
114-117 F4.1 mag KmagLim ? 2σ limit K magnitude, for undetected
sources, based upon a 1" radius aperture
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- CENSORS CENSORS sequential number
5- 7 I3 --- EISD EISD sequential number
9- 14 F6.4 --- z Redshift
16- 18 F3.1 arcsec thetam Aperture radius used to measure the
K-band magnitude
20- 24 F5.2 mag Kmag(thetam) Measured aperture magnitude
(in thetam radius)
26- 30 F5.2 mag Kmag Magnitude after correction to 63.9kpc
32- 33 I2 0.01mag e_Kmag rms uncertainty on Kmag
35 A1 --- Class [GQS] Classification (1)
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Note (1): Classification as follows:
G = radio galaxies
Q = quasars
S = star forming galaxies
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- CENSORS CENSORS sequential number
5- 80 A76 --- Note Text of the note
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History:
From electronic version of the journal
References:
Best et al., Paper I 2003MNRAS.346..627B 2003MNRAS.346..627B, Cat. J/MNRAS/346/627
Brookes et al., Paper III in prep.
(End) Patricia Vannier [CDS] 25-Sep-2006