J/MNRAS/380/1449 1.4GHz radio sources in Lynx and Hercules fields (Rigby+, 2007)
A sample of mJy radio sources at 1.4GHz in the Lynx and Hercules fields.
I. Radio imaging, multicolour photometry and spectroscopy.
Rigby E.E., Snellen I.A.G., Best P.N.
<Mon. Not. R. Astron. Soc., 380, 1449-1466 (2007)>
=2007MNRAS.380.1449R 2007MNRAS.380.1449R
ADC_Keywords: Radio sources
Keywords: galaxies: active - galaxies: distances and redshifts -
galaxies: evolution - galaxies: photometry - radio continuum: galaxies
Abstract:
With the goal of identifying high-redshift radio galaxies with
Fanaroff-Riley class I (FR I) classification, here are presented
high-resolution, wide-field radio observations, near-infrared and
optical imaging and multi-object spectroscopy of two fields of the
Leiden-Berkeley Deep Survey. These fields, Hercules.1 and Lynx.2,
contain a complete sample of 81 radio sources with S(1.4GHz)>0.5mJy
within 0.6deg2. This sample will form the basis for a study of the
population and cosmic evolution of high-redshift, low-power, FR I
radio sources which will be presented in Paper II. Currently, the
host galaxy identification fraction is 86 per cent with 11 sources
remaining unidentified at a level of r'≥25.2mag (Hercules; 4 sources)
or r'≥24.4mag (Lynx; 7 sources) or K≥20mag. Spectroscopic redshifts
have been determined for 49 per cent of the sample and photometric
redshift estimates are presented for the remainder of the sample.
Description:
The VLA data were taken with the array in A configuration on 2002
April 22 for the Hercules field, and 2002 February 15 for the Lynx
field. Both sets of observations were taken at a frequency of 1.4GHz
(L band), in four intermediate frequency (IF) spectral line mode to
enable wide-field imaging, using 16 channels of width 781.25kHz. The
IFs were centred on 1391.3 and 1471.1MHz observing dual polarization.
Both the Hercules and the Lynx fields were observed for 8.5h each.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 66 39 The Hercules radio source positions from the
VLA A-array observations
table2.dat 66 42 The Lynx radio source positions from the
VLA A-array observations
table3.dat 66 4 *The Hercules and Lynx field sources which did
not fall within the optical field but were
included in the infrared observations
table8.dat 113 39 The host galaxy positions and magnitudes for
the Hercules field
table9.dat 113 42 The host galaxy positions and magnitudes for
the Lynx field
table11.dat 69 10 Summary of the TNG observations
table13.dat 90 58 Spectroscopic redshifts and line information for
the Hercules and Lynx fields
table14.dat 19 78 Redshifts found for sources in the complete sample
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Note on table3.dat: They are given a weight of 0.00 as they are not part of
the complete sample. They are included here for completeness.
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See also:
J/A+AS/71/221 : The 65W part of the WSRT 21 cm survey in Lynx (Oort, 1987)
J/MNRAS/317/801 : LBDS Hercules sample griJHK photometry (Waddington+, 2000)
Byte-by-byte Description of file: table[123].dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- WSTB Hercules or Lynx name
9- 10 I2 h RAh Right ascension (J2000)
12- 13 I2 min RAm Right ascension (J2000)
15- 19 F5.2 s RAs Right ascension (J2000)
21 A1 --- DE- Declination sign (J2000)
22- 23 I2 deg DEd Declination (J2000)
25- 26 I2 arcmin DEm Declination (J2000)
28- 31 F4.1 arcsec DEs Declination (J2000)
33- 37 F5.2 mJy SOort Oort et al. (1987A&A...179...41O 1987A&A...179...41O) 1.4GHz
primary beam corrected flux density
39- 42 F4.2 mJy e_SOort rms uncertainty on SOort
44- 48 F5.2 mJy S1.4GHz A-array 1.4GHz primary beam corrected
flux density
50- 53 F4.2 mJy e_S1.4GHz rms uncertainty on S1.4GHz
55- 58 F4.2 --- w_S1.4GHz Source weight
60- 64 F5.2 --- CPB Primary beam correction factor
66 A1 --- n_S1.4GHz [IT] (I)MFIT or (T)VSTAT measured flux density
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Byte-by-byte Description of file: table[89].dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- WSTB Hercules or Lynx name
9- 10 I2 h RAh ? Right ascension (J2000)
12- 13 I2 min RAm ? Right ascension (J2000)
15- 19 F5.2 s RAs ? Right ascension (J2000)
21 A1 --- DE- Declination sign (J2000)
22- 23 I2 deg DEd ? Declination (J2000)
25- 26 I2 arcmin DEm ? Declination (J2000)
28- 31 F4.1 arcsec DEs ? Declination (J2000)
33 A1 --- l_rmag Limit flag on rmag (3sigma limit)
34- 38 F5.2 mag rmag ? r magnitude aperture in radrmag radius
39 A1 --- n_rmag [*] * for unmeasurable sources (1)
40- 43 F4.2 mag e_rmag ? rms uncertainty on rmag
45- 47 F3.1 arcsec rrad ? Aperture radius for rmag
49- 53 F5.2 mag rmag2 ?=- r magnitude aperture in 63.9kpc radius
55- 58 F4.2 mag e_rmag2 ? rms uncertainty on rmag2
60 A1 --- l_imag Limit flag on imag (3sigma limit)
61- 65 F5.2 mag imag ? i magnitude aperture in radimag radius
66 A1 --- n_imag [*] * for unmeasurable sources (1)
67- 70 F4.2 mag e_imag ? rms uncertainty on imag
72- 74 F3.1 arcsec irad ? Aperture radius for imag
76- 80 F5.2 mag imag2 ?=- i magnitude aperture in 63.9kpc radius
82- 85 F4.2 mag e_imag2 ? rms uncertainty on imag2
87 A1 --- l_Kmag Limit flag on Kmag (3sigma limit)
88- 92 F5.2 mag Kmag ? K magnitude in radKmag radius
94- 97 F4.2 mag e_Kmag ? rms uncertainty on Kmag
99-102 F4.1 arcsec Krad ? Aperture radius for Kmag
104-108 F5.2 mag Kmag2 ? K magnitude aperture in 63.9kpc radius
110-113 F4.2 mag e_Kmag2 ? rms uncertainty on Kmag2
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Note (1): * for sources which were unmeasurable due to the presence of a
nearby bright object
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Byte-by-byte Description of file: table11.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Mask Mask designation (1)
4- 5 I2 deg PA Position angle
7- 8 I2 h RAh Centre right ascension (J2000)
10- 11 I2 min RAm Centre right ascension (J2000)
13- 17 F5.2 s RAs Centre right ascension (J2000)
19 A1 --- DE- Centre declination sign (J2000)
20- 21 I2 deg DEd Centre declination (J2000)
23- 24 I2 arcmin DEm Centre declination (J2000)
26- 29 F4.1 arcsec DEs Centre declination (J2000)
31- 32 I2 arcsec Slit Slit length
34- 43 A10 "DD/MM/YYYY" Date Observation date
45- 65 A21 --- ExpTime Exposure times (s)
67- 69 F3.1 arcsec Seeing Seeing
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Note (1): H and L refer to the Hercules and Lynx fields, respectively.
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Byte-by-byte Description of file: table13.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Mask Mask designation
3- 4 A2 --- Mask2 Second mask name
6- 12 A7 --- WSTB Hercules or Lynx source name
14- 19 F6.1 0.1nm lambda ? Wavelength in Å
22- 35 A14 --- Line Line designation
36 A1 ---- l_Flux [~] Limit flag on Flux
37- 41 F5.2 10-19W/m2 Flux ? Line flux (in 10-16erg.s-1.cm-2)
44- 47 F4.2 10-19W/m2 e_Flux ? rms uncertainty on Flux
50- 53 I4 km/s D(FWHM) ?=- ΔFWHM
55- 58 I4 km/s e_D(FWHM) ? rms uncertainty on D(FWHM)
59 A1 --- l_W [~] Limit flag on W
60- 62 I3 0.1nm W ? Line width
64- 66 I3 0.1nm e_W ? rms uncertainty on W
68- 72 F5.3 --- z ? Redshift
74- 78 F5.3 --- e_z ? rms uncertainty on z
80- 84 F5.3 --- zf ? Final redshift
86- 90 F5.3 --- e_zf ? rms uncertainty on Finalz
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Byte-by-byte Description of file: table14.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- WSTB Hercules or Lynx name
9 A1 --- l_z Limit flag on z
10- 14 F5.3 --- z ? Redshift
18- 19 A2 --- r_z Redshift origin (1)
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Note (1): Redshift origin as follows:
1a = Spectrosocpic redshift (Waddington et al., 2000,
Cat. J/MNRAS317/801 and references therein;
Bershady et al., 1994AJ....108..870B 1994AJ....108..870B)
1b = photometric published redshift
(Waddington et al., 2001MNRAS.328..882W 2001MNRAS.328..882W)
1c = redshift came from the SDSS
2 = DOLORES spectroscopic value
3 = K-z estimate
4 = r-z estimate
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History:
* 11-Dec-2008: From electronic version of the journal
* 24-Jun-2009: Position corrected in table9 for 55w138
(Dec was +44 26 22.0 instead of +44 66 22.0)
(End) Patricia Vannier [CDS] 22-Sep-2008