J/A+A/379/21 Radio-optically selected galaxy clusters I. (Zanichelli+, 2001)
Radio-optically selected clusters of galaxies. I. The radiogalaxy sample.
Zanichelli A., Vigotti M., Scaramella R., Grueff G., Vettolani G.
<Astron. Astrophys. 379, 21 (2001)>
=2001A&A...379...21Z 2001A&A...379...21Z
ADC_Keywords: Clusters, galaxy ; Galaxies, radio
Keywords: catalogs - radio continuum: galaxies - galaxies: clusters: general -
cosmology: observations
Description:
The radiosource catalogs have been extracted from 31 NRAO VLA Sky
Survey maps (NVSS, Condon et al., 1988AJ....115.1693C 1988AJ....115.1693C) over
approximately 550 square degrees of sky in the region of the South
Galactic Pole.
File table1.dat contains the catalog of 13340 pointlike sources. For
each source are given: Right Ascension and Declination, source name
(if applicable), peak flux, flux rms from the fit, error on source
position as estimated by the fitting algorithm, x and y pixel of the
position where the peak has been detected on the map (starting
position for the fit), control flags coming from the extraction
algorithm, and name of the radio map where the source has been
detected. The name is specified for (1) pointlike sources that are
detected in a multiple system (name = DSnnnn or TSnnnn) (2) sources
initially classified as components of a double system, which has been
considered spurious on the basis of the distance between components
(name = Cnnnn or DCnnnn).
File table2.dat contains the catalog of 2662 double radiosources. For
each source the following parameters are given both for the barycentre
and the two components: Right Ascension and Declination, source name,
peak flux, flux rms from the fit, error on source position as
estimated by the fitting algorithm, distance between the components of
the double system, x and y pixel of the position where the peak has
been detected on the map (starting position for the fit), control
flags coming from the extraction algorithm, and name of the radio map
where the source has been detected.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 82 13340 Catalog of pointlike radiosources from NVSS maps
table2.dat 87 7986 Catalog of double radiosources from NVSS maps
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See also:
J/A+A/379/35 : Radio-optically selected galaxy clusters II. (Zanichelli+, 2001)
http://www.cv.nrao.edu/NVSS : the NVSS Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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2- 3 I2 h RAh Right ascension (J2000)
5- 6 I2 min RAm Right ascension (J2000)
8- 13 F6.3 s RAs Right ascension (J2000)
15 A1 --- DE- Declination sign
16- 17 I2 deg DEd Declination (J2000)
19- 20 I2 arcmin DEm Declination (J2000)
22- 26 F5.2 arcsec DEs Declination (J2000)
28- 33 A6 --- Name Source name (1)
35- 42 F8.1 mJy Flux Peak flux (in mJy/beam at 1.4GHz)
44- 50 F7.2 mJy/pix e_Flux Fit rms on flux (2)
52- 57 F6.1 arcsec e_Pos Fit rms on position
60- 63 I4 pix PXpox Peak X position on NVSS map
65- 68 I4 pix PYpox Peak Y position on NVSS map
70 A1 --- Flag1 See Note (3)
72- 73 A2 --- Flag2 See Note (4)
75- 82 A8 --- Map NVSS map name
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Note (1): Source name is given only for pointlike sources found in multiple
systems (name = DSnnnn or TSnnnn) or for pointlike sources initially
classified as components of spurious doubles (name = Cnnnn or DCnnnn)
Note (2): Fit rms is the Σ1fit parameter in the text of the paper.
Note (3): Flag:
b: extended source - the barycentre position is assigned to the source
i: source has been visually inspected and fitted with the AIPS task JMFIT
r, *: the 1-Gaussian fit has been restored
Note (4): Detection flag:
D: pointlike source detected in a multiple system (source 1 has a
neighbour (source 2) inside 2.5 arcmin)
D+: pointlike source detected in a double D system (source 2 has in turn
a neighbour inside 2.5 arcmin)
T: pointlike source detected in a triple system (3 sources inside 2.5')
ex: initially detected in a D/D+ system, after visual inspection these
sources are considered pointlike
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Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
2- 3 I2 h RAh Right ascension (J2000)
5- 6 I2 min RAm Right ascension (J2000)
8- 13 F6.3 s RAs Right ascension (J2000)
15 A1 --- DE- Declination sign
16- 17 I2 deg DEd Declination (J2000)
19- 20 I2 arcmin DEm Declination (J2000)
22- 26 F5.2 arcsec DEs Declination (J2000)
28- 33 A6 --- Name source name (1)
35- 42 F8.1 mJy Flux Peak flux (in mJy/beam at 1.4GHz)
44- 50 F7.2 mJy e_Flux Fit rms on flux (in mJy/pixel) (2)
52- 57 F6.1 arcsec e_Pos Fit rms on position
59- 63 F5.1 arcsec D Distance between the two components of the
double radiosource
65- 68 I4 pix PXpos Peak X position on NVSS map
70- 73 I4 pix PYpos Peak Y position on NVSS map
75 A1 --- Flag1 See Note (3)
77- 78 A2 --- Flag2 See Note (4)
80- 87 A8 --- Map NVSS map name
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Note (1): Barycentres and components are identified respectively by the
letters "B" and "C" in their name. For double radiosources in D or D+
systems the prefixes "DB" and "DC" are used. For double radiosources
in triple systems "TB" and "TC" are used
Note (2): Fit rms is the Σ2fit parameter in the text of the paper.
Note (3): Flag:
i: source has been visually inspected and fitted with the AIPS task JMFIT
*: extended source - forced to the 2 Gaussians fit, see the text.
Note (4): Detection flag:
D: double source detected in a multiple system (source 1 has a
neighbour (source 2) inside 2.5 arcmin)
D+: double source detected in a double D system (source 2 has in turn
a neighbour inside 2.5 arcmin)
T: double source detected in a triple system (3 sources inside 2.5')
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Acknowledgements: Alessandra Zanichelli
(End) Patricia Bauer [CDS] 07-Nov-2001