J/A+A/374/861 Positions of giant radio galaxies (Schoenmakers+ 2001)
A new sample of giant radio galaxies from the WENSS survey
Schoenmakers A.P., de Bruyn A.G., Rottgering H.J.A., van der Laan H.
<Astron. Astrophys. 374, 861 (2001)>
=2001A&A...374..861S 2001A&A...374..861S
ADC_Keywords: Galaxies, radio ; Positional data ; Photometry
Keywords: galaxies: active - intergalactic medium - galaxies: jets -
radio continuum: galaxies
Description:
In tablea1.dat, we present the WENSS selected candidate GRGs after
removing sources identified as non-GRGs on basis of optical data.
In tablea2.dat, we present the log of the spectroscopic observations
of GRG andidates in our sample.
In tablea3.dat, we present properties of the radio cores and the
optical identifications of the spectroscopically observed giant radio
sources, and of the confirmed giant sources B1144+352, B1245+676 and
B1310+451. We provide the name of the radio source in IAU notation,
the observation used to determine the radio core position and its flux
density and the radio core position in right ascension and
declination, respectively, in B1950.0 coordinates. The radio positions
have been obtained by fitting a Gaussian in the radio map. We further
provide the integrated flux density at 1.4GHz of the radio core, the
position of the optical identification in right ascension and
declination, respectively, in B1950.0 coordinates, obtained from
fitting a Gaussian in the available optical image and the magnitude of
the identification in the red (POSS-E) band of the Palomar survey. The
magnitudes for sources weaker than 15.0 have been obtained from the
APM catalogue and are estimated to be accurate to 0.5 mag. For
brighter sources, we have measured the magnitudes directly from the
digitized POSS-I frames using the photometric calibration for stars
available from the STScI WWW-pages and through the getimage-2.0 plate
retrieval software. Typical uncertainties in these values are
estimated to be large, at least 1mag.
In tablea4.dat, further radio properties of the sources in
tablea3.dat. We present the integrated flux density of the source at
325MHz from the Westerbork Northern Sky Survey (WENSS) (unless stated
otherwise), the integrated flux density at 1400MHz from the NVSS, the
spectral index between 325 and 1400MHz, the redshift of the host
galaxy, the angular size of the radio source in arcminutes, the
resulting projected linear size in Mpc (using H_0=50km/s/Mpc,
q0=0.5) and the radio luminosity at an emitted frequency of 325MHz.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 87 105 WENSS selected candidate GRGs after removing
sources identified as non-GRGs on basis of
optical data
tablea2.dat 43 40 Log of the spectroscopic observations of GRG
candidates in our sample
tablea3.dat 99 32 Properties of the radio cores and
optical identifications
tablea4.dat 85 33 Radio properties of the sources
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- IAUname Source name according to IAU convention
11- 12 I2 h RAh Right ascension (B1950.0)
14- 15 I2 min RAm Right ascension (B1950.0)
17- 18 I2 s RAs Right ascension (B1950.0)
20 A1 --- DE- Declination sign (B1950.0)
21- 22 I2 deg DEd Declination (B1950.0)
24- 25 I2 arcmin DEm Declination (B1950.0)
27- 28 I2 arcsec DEs Declination (B1950.0)
30- 33 F4.2 Jy S325 Integrated WENSS flux of the source at 325MHz
35- 36 I2 arcmin Size Size of the source
38- 40 A3 --- Flag Indicates whether the source is considered
as a GRG-candidate
42- 87 A46 --- Com Reason for selection of the source
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- IAUname Source name according to IAU convention
11- 17 A7 --- Tel Telescope used for observations (1)
19- 28 A10 "DD/MM/YYYY" Date Observation date
30- 33 I4 0.1nm lambda ? Central wavelength of the observation
(for INT only)
35 I1 arcsec Slit Used width of the slit
37- 40 I4 s IntTime Integration time
42- 43 A2 --- Cond Observing conditions (2)
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Note (1): Telescopes used:
INT: 2.5-m INT telescope on La Palma
WHT: 4.2-m WHT telescope on La Palma
2.2m UH: 2.2-m UH telescope
Note (2): Observing conditions:
P: photometric conditions
NP: non-photometric conditions, or cirrus clouds
C: cloudy conditions
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Byte-by-byte Description of file: tablea3.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- IAUname Source name according to IAU convention
11- 15 A5 --- Survey Radio observation for position
17- 18 I2 h RArh ? Right ascension of radio core B1950
20- 21 I2 min RArm ? Right ascension of radio core B1950
23- 27 F5.2 s RArs ? Right ascension of radio core B1950
29- 32 F4.2 s e_RArs ? Error in Right ascension
34 A1 --- DEr- Declination sign of radio core B1950
35- 36 I2 deg DErd ? Declination of radio core B1950
38- 39 I2 arcmin DErm ? Declination of radio core B1950
41- 44 F4.1 arcsec DErs ? Declination of radio core B1950
46- 48 F3.1 arcsec e_DErs ? Error in Declination
50- 54 F5.1 mJy RadFlux ? Flux of radio core at 1.4GHz
56- 59 F4.1 mJy e_RadFlux ? Error in flux
61- 62 I2 h RAh Right ascension of host galaxy B1950
64- 65 I2 min RAm Right ascension of host galaxy B1950
67- 71 F5.2 s RAs Right ascension of host galaxy B1950
73- 76 F4.2 s e_RAs Error in Right ascension
78 A1 --- DE- Declination sign of host galaxy B1950
79- 80 I2 deg DEd Declination of host galaxy B1950
82- 83 I2 arcmin DEm Declination of host galaxy B1950
85- 88 F4.1 arcsec DEs Declination of host galaxy B1950
90- 92 F3.1 arcsec e_DEs Error in Declination
94- 97 F4.1 mag Emag Magnitude of host galaxy on POSS-E plates
99 A1 --- Note *[ABC]
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Note on Note:
A = Undetected radio core.
B = Variable radio core.
C = Merged with nearby star on Sky survey. Magnitude has been determined by
subtracting the flux from the star, obtained by fitting a Gaussian, from
the integrated flux of the star and galaxy combined. The error is
therefore large (estimated at 1 mag.).
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Byte-by-byte Description of file: tablea4.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- IAUname Source name according to IAU convention
11- 14 F4.2 Jy S325 ? Flux density at 325MHz
16- 19 F4.2 Jy e_S325 ? Error in Flux Density at 325MHz
21- 23 I3 mJy S1400 ? Flux density at 1400MHz
25- 26 I2 mJy e_S1400 ? Error in flux density at 1400MHz
28- 32 F5.2 --- Sp+Index ? Spectral index between 325 and 1400MHz
(Snu prop. to nualpha)
34- 37 F4.2 --- e_Sp+Index ? Error in spectral index
39- 44 F6.4 --- z Redshift of the host galaxy
46- 51 F6.4 --- e_z Error in the redshift
53- 56 F4.1 arcmin theta ? Angular size of the radio source
58- 60 F3.1 arcmin e_theta ? Error in the angular size
62- 65 F4.2 Mpc D Projected linear size of radio source
67- 70 F4.2 Mpc e_D Error in the projected linear size
72- 76 F5.2 [W/Hz] logP325 Log of the radio power at 325MHz
78- 81 F4.2 [W/Hz] e_logP325 Error in the log of the radio power
83- 85 A3 --- Note *[ABCDEFGHIJKLMN]
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Note on Note:
A = Subtracted 41 ± 7 mJy background object at RA 06 49 02.7,
Dec. 73 25 55 and at frequency 325MHz.
B = Subtracted 19.8 ± 1.1 mJy background object at RA 06 49 02.7,
Dec. 73 25 55 and at frequency 1400MHz.
C = Subtracted 149 ± 11 mJy background object at RA 07 47 48.2,
Dec. 42 39 56 and at frequency 325MHz.
D = Subtracted 26 ± 1 mJy background object at RA 07 47 48.2,
Dec. 42 39 56 and at frequency 1400MHz.
E = See Schoenmakers et al. (2000MNRAS.315..371S 2000MNRAS.315..371S) for more details on
this source.
F = Includes background source at RA 10 29 36.3 Dec. 28 13 15.9 (flux
density 10 ± 1 mJy at 1400MHz).
G = In WENSS polar cap region (observed frequency 351MHz).
H = Subtracted 72±7 mJy background object at RA 11 10 24.8,
Dec. 40 38 03 and at frequency 325MHz.
I = See Schoenmakers et al. (1999A&A...341...44S 1999A&A...341...44S) for more details on
this source.
J = Redshift from Colla et al. (1975A&AS...20....1C 1975A&AS...20....1C).
K = Redshift from Marcha et al. (1996MNRAS.281..425M 1996MNRAS.281..425M).
L = Subtracted 90 ± 7 mJy background source at RA 19 18 17.1,
Dec. 51 37 53 and at frequency 325MHz.
M = Subtracted 26 ± 1 mJy background source at RA 19 18 17.1,
Dec. 51 37 53 and at frequency 1400MHz.
N = Uncertain redshift.
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Acknowledgements: Arno Schoenmakers
History: Tables A1 and A2 where added on 12-Feb-2002
(End) Arno P. Schoenmakers [ASTRON], Patricia Bauer [CDS] 17-Jul-2001