J/A+A/379/35 Radio-optically selected galaxy clusters. II. (Zanichelli+, 2001)
Radio-optically selected clusters of galaxies. II. The cluster sample.
Zanichelli A., Scaramella R., Vettolani G., Vigotti M., Bardelli S.,
Zamorani G.
<Astron. Astrophys. 379, 35 (2001)>
=2001A&A...379...35Z 2001A&A...379...35Z
ADC_Keywords: Clusters, galaxy ; Galaxies, radio
Keywords: catalogs - radio continuum: galaxies - galaxies: clusters: general -
cosmology: observations
Description:
File table1.dat contains data relative to spectroscopic and
photometric observations of galaxies in 12 radio-optically selected
candidate clusters. Observations have been acquired with the 3.6m ESO
telescope, Chile. For each galaxy in the cluster, a sequential number,
the magnitude in r-Gunn filter, the measured velocity, velocity rms,
and notes to identify particular objects (emission galaxies,
radiogalaxies and stars) are given.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 47 133 Measured velocities and r-Gunn magnitudes for
galaxies in the 12 observed cluster candidates
table2.dat 60 9 Mean velocity and velocity dispersion obtained
from the package ROSTAT for the 9
spectroscopically confirmed clusters.
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See also:
J/A+A/379/21 : Radio-optically selected galaxy clusters. I. (Zanichelli+, 2001)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Cluster Cluster name (1)
10- 11 I2 --- Ngal Galaxy sequential number in the cluster
14- 18 F5.2 mag Rmag ? R Gunn galaxy magnitude
22- 27 I6 km/s Vel ? Galaxy velocity
34- 36 I3 km/s e_Vel ? Galaxy velocity rms
44 A1 --- Notes [ER*] See Note (2)
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Note (1): The naming convention for cluster candidates is as follows:
first digits identify the number of the UKST plate on which the
candidate has been found; letters are used to distinguish among the
various radio morphologies (pointlike or double sources) and to
identify candidates associated to more than one radiogalaxy. Last
digits in the name are the sequential number of the radio source on
that UKST plate.
Note (2): Notes on galaxy spectra:
E: Galaxy with emission lines
R: Cluster radiogalaxy
*: Star
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Cluster Cluster name (1)
8- 9 I2 h RAh Right ascension (B1950)
11- 12 I2 min RAm Right ascension (B1950)
14- 17 F4.1 s RAs Right ascension (B1950)
19 A1 --- DE- Declination sign (B1950)
20- 21 I2 deg DEd Declination (B1950)
23- 24 I2 arcmin DEm Declination (B1950)
26- 29 F4.1 arcsec DEs Declination (B1950)
31- 32 I2 --- o_ Number of measured velocities
35- 39 I5 km/s Mean velocity
41- 43 I3 km/s E_ Error on (upper limit)
45- 47 I3 km/s e_ Error on (lower limit)
50- 52 I3 km/s sigma Velocity dispersion
54- 56 I3 km/s E_sigma Error on sigma (upper limit)
58- 60 I3 km/s e_sigma Error on sigma (lower limit)
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Note (1): Informations about the 3 clusters not in this table:
349N02: the few available spectroscopic data are not useful for a
statistical analysis aimed to assess the presence of a cluster around
the radio source.
409N03 & 412N23: the radiogalaxy velocity is significantly different
from all the other measured values and we conclude that the
radiogalaxy is not associated to a cluster. In both cases the data
suggest the presence of a group or cluster, but at a redshift
different from that of the radiogalaxy.
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Acknowledgements: Alessandra Zanichelli
(End) Patricia Bauer [CDS] 07-Nov-2001