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VII/71 Redshifts for Zwicky's Near Clusters (Baiesi-Pillastrini+ 1984)
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Redshifts for Zwicky's Near Clusters
Baiesi-Pillastrini G.C., Palumbo G.G.C., Vettolani G.
<Astron. & Astrophys. Suppl. 56, 363 (1984)>
=1984A&AS...56..363B
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ADC_Keywords: Radial velocities; Galaxies; Clusters, galaxy
Description:
The catalog contains a list of redshifts for Zwicky's Near Clusters.
All of the 503 Zwicky Near Clusters as given in the Uppsala General
Catalogue of Galaxies (UGC) are listed and radial velocity information
for those that have at least one galaxy with published redshift
positioned within the contours given in the Zwicky catalog is
provided. Redshifts of galaxies belonging to clusters is obtained
from the catalog of Radial Velocities of Galaxies. The catalog
includes UGC cluster numbers, Zwicky field numbers, contour numbers,
positions, heliocentric cluster radial velocities, and notes.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 38 585 Catalog Data
notes.dat 76 177 Notes
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Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- UGC *? UGC cluster number
4 A1 --- Suffix *[ a] Suffix
6- 11 A6 --- ZwickyID *Zwicky catalog Identification
12- 14 I3 h RAh *? right ascension (Equatorial Coord. 1950.0)
15- 19 F5.1 min RAm ? RA in minutes
21 A1 --- DE- [+-] Sign of declination (1950.0)
22- 23 I2 deg DEd ? declination in degrees (1950.0)
24- 26 I3 arcmin DEm ? DEC in arcminutes
27- 32 I6 km/s RV *? Radial velocity cluster/all avail. values
33- 36 I4 --- Num *? Number of gal. used
38 A1 --- flag *[*] Note flag (see notes.dat)
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Note on UGC:
Number of the cluster as it is listed in the Uppsala General Catalogue
of Galaxies (Nilson, 1973; UGC). The file is sorted on this field.
Note on Suffix:
Differentiates between clusters having the same UGC number. It is always
either " " or "a".
Note on ZwickyID:
Zwicky catalog identification.
Number of the field (before hyphen) in which the cluster appears in the
Zwicky catalog (Zwicky et al. 1961-68). After the hyphen one would find
contour number in the Zwicky catalog.
Note on RAh:
Positions are for cluster center.
Note on RV:
Heliocentric radial velocity of the cluster in km/sec. Usually this is
the arithmetic mean of the individual radial velocities of the galaxies
in the cluster (i.e., excluding those objects apparently in the
foreground or background). However, in some clusters so few galaxies had
available radial velocities that the determination of a unique or even
most likely cluster velocity was not possible. When this happened, all
the values found were listed separately in continuation records. If all
the previous fields are blank, then the data in this and the following
fields are a continuation of the previous record.
Note on Num:
Number of galaxies used to determine the radial velocity given in this
record. Only galaxies having published redshifts measured within the
contour given in the Zwicky catalog were used in calculating this value.
Note on flag:
An asterisk (*) indicates that there is a note containing additional
information about this object in the second file (notes.dat). If there is
no note, this field is blank.
Remarks on file catalog.dat:
In some cases a unique radial velocity for the entire cluster could not
be determined. When this happened, all the values found were listed in
continuation records, one per record. A continuation record has the
first fields (the identifying information) blank. There is a maximum of
three continuation records for a single cluster.
Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- UGC *? UGC cluster number
4 A1 --- Suffix *[a] Suffix
6- 76 A71 --- note *Note
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Note on UGC:
UGC cluster number of the object in the catalog file to which this note
refers. The notes file is sorted on this field.
Note on Suffix:
Suffix to the UGC number to differentiate between clusters with the same
UGC number: always either blank or a. If UGC and Suffix fields are blank,
then the note field is a continuation from the previous record. No note
requires more than one continuation line.
Note on note:
The text of the note. Two abbreviations are used throughout the file.
They are:
F : Foreground
B : Background
If necessary, a continuation line is used to contain the text.
Remarks on file notes.dat:
The Notes file contains notes to the data in the catalog file. The
Notes are identified by the UGC cluster number of the record to
which they refer. Generally they expand on or clarify the radial
velocity information given in the catalog file (listing anomalous
cluster members, foreground and background objects, and alternative
velocities when the stated velocity was questionable). Alternate
names are also listed here. If more than one record is needed to
contain the full text of the note, a continuation record is used.
Remarks and Modifications:
Redshifts for Zwicky''s Near Clusters was received by the Astronomical
Data Center (ADC), NASA Goddard Space Flight Center, from the Centre de
Donnees Astronomiques, Strasbourg (CDS), in February 1986.
The original tape contained two text files formatted in the same manner
as the published catalog (Baiesi-Pillastrini et al. 1984). An editor was
used to compress the data file from 76- to 38-byte records by removing
blank columns. A FORTRAN program was run that checked the validity of
each field according to its data type and value.
An apparently erroneous value of declination, 63deg. 63', was found in
the record for cluster number 83. A check of the UGC, source of the
coordinates, revealed the same error in that catalog. Following the UGC
reference, the object was located in the Catalogue of Galaxies and
Clusters of Galaxies, where the declination is given as 63deg. 23'. The
declination has been corrected to this value in this version of the
catalog. An editor was also used to replace ditto marks with the implied
words in the notes.dat file.
Acknowledgments:
The original ADC documentation by Anne C. Raugh (1987) was used to
generate this ReadMe file.
References:
Baiesi-Pillastrini, G. C., Palumbo, G. G. C., and Vettolani, G. 1984,
Astron. Astrophys. Suppl. Ser., 56, 363-371.
Nilson, P. 1973, Uppsala General Catalogue of Galaxies, Nova Acta Regia
Soc. Scient. Uppsalensis, Ser. V: A., Vol. 1, Uppsala.
Palumbo, G. G. C., Tanzella-Nitti, G., and Vettolani, G. 1983, Catalogue
of Radial Velocities of Galaxies (New York: Gordon & Breach).
Zwicky, F., Herzog, E., Wild, P., Karpowicz, M., and Kowal, C. T.
1961-68, Catalogue of Galaxies and Clusters of Galaxies, (6 volumes;
Pasadena: California Institute of Technology).
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(End) C.-H. Joseph Lyu [Hughes STX/NASA] 27-Jan-1997