VII/71 Redshifts for Zwicky's Near Clusters (Baiesi-Pillastrini+ 1984)
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
ADC_Keywords: Radial velocities; 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:
FileName Lrecl Records Explanations
ReadMe 80 . This file catalog.dat 40 585 Catalog Data notes.dat 76 177 *Notes
Notes on notes.dat: The notes generally 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.
See also: VII/26 : Uppsala General Catalogue of Galaxies (UGC) (Nilson 1973) VII/4 : Abell and Zwicky Clusters of Galaxies (Abell+ 1974) VII/99 : Radial Velocities of Galaxies (Palumbo+ 1986) Byte-by-byte Description of file: catalog.dat
Bytes Format Units Label Explanations
1- 3 I3 --- UGCl * UGC cluster number 4 A1 --- UGCla *[ a] Suffix 6- 11 A6 --- ZwCl *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 28 A1 --- f_RV *[ABCD] when several velocities are listed 29- 34 I6 km/s RV *?Radial velocity of cluster 35- 38 I4 --- N *? Number of galaxies used 40 A1 --- note *[*] Note detailed in file "notes.dat"
Note on UGCl, UGCla: Number of the cluster as it is listed in the Uppsala General Catalogue of Galaxies (Nilson, 1973). The suffix (UGCla) differentiates between clusters having the same UGCl number. Note on ZwCl: Zwicky cluster 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, f_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 individual records, and the flag f_RV is set to 'A', 'B' etc Note on N: 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 note: 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.
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 3 I3 --- UGCl *UGC cluster number 4 A1 --- UGCla *[a] Suffix 6- 76 A71 --- note *Text of Note
Note on UGCl, UGCla: Number of the cluster as its suffix as in the "catalog.dat" file. When several lines are required, UGCl and UGCla are repeated. Note on note: The text of the note. Two abbreviations are used throughout the file: F : Foreground B : Background If necessary, a continuation line is used to contain the text.
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. In August 2004, the column f_RV indicating several velocities for a cluster was added in catalog.dat (Francois Ochsenbein, CDS) 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. (Cat. VII/71) Nilson, P. 1973, Uppsala General Catalogue of Galaxies, Nova Acta Regia Soc. Scient. Uppsalensis, Ser. V: A., Vol. 1, Uppsala. (Cat. VII/26) Palumbo, G. G. C., Tanzella-Nitti, G., and Vettolani, G. 1983, Catalogue of Radial Velocities of Galaxies (New York: Gordon & Breach). (See Cat. VII/99) 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). (See Cat. VII/4)
(End) C.-H. Joseph Lyu [Hughes STX/NASA]; Francois Ochsenbein [CDS] 03-Aug-2004
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