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J/ApJ/579/93 KPNO/Deeprange distant cluster survey (Postman+, 2002)
The KPNO/Deeprange distant cluster survey. I. The catalog and the space density of intermediate-redshift clusters. Postman M., Lauer T.R., Oegerle W., Donahue M. <Astrophys. J. 579, 93 (2002)> =2002ApJ...579...93P
ADC_Keywords: Clusters, galaxy ; Galaxy catalogs ; Redshifts Keywords: catalogs - galaxies: clusters: general - large-scale structure of universe Abstract: We have conducted an automated search for galaxy clusters within a contiguous 16deg2 I-band survey in the north Galactic hemisphere. A matched filter detection algorithm identifies 444 cluster candidates in the range 0.2≲z≲1.2. The full catalog is presented along with the results from a follow-up spectroscopic survey. Description: The imaging phase of the survey was conducted in the I-band using the prime focus CCD camera on the KPNO Mayall 4-m telescope. The observations were conducted over a 2-yr period between 1994 January and 1996 March. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 82 444 Deeprange Cluster Catalog table4.dat 78 351 Galaxy Redshifts table5.dat 24 38 Cluster redshifts
See also: J/A+AS/116/203 : The redshift catalogue for galaxy clusters (Stein+, 1996) J/ApJS/102/289 : CNOC cluster redshift survey catalogs. II. (Yee+, 1996) J/ApJS/113/1 : CNOC cluster redshift survey catalogs. III. (Ellingson+ 1997) J/ApJS/116/211 : CNOC cluster redshift survey catalogs. IV. (Yee+ 1998) J/ApJS/116/231 : CNOC cluster redshift survey catalogs. V. (Abraham+ 1998) J/ApJS/116/247 : CNOC cluster redshift survey catalogs. VI. (Ellingson+ 1998) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- [PLO2002] Deeprange survey cluster ID number (G1) (1) 5- 6 I2 h RAh Hour of Right Ascension (J2000) 8- 9 I2 min RAm Minute of Right Ascension (J2000) 11- 15 F5.2 s RAs Second of Right Ascension (J2000) 17 A1 --- DE- Sign of the Declination (J2000) 18- 19 I2 deg DEd Degree of Declination (J2000) 21- 22 I2 arcmin DEm Arcminute of Declination (J2000) 24- 27 F4.1 arcsec DEs Arcsecond of Declination (J2000) 29- 32 F4.2 --- z Estimated redshift 34- 38 F5.1 --- Lambda The Λ_CL_ value (2) 40- 43 F4.1 --- NA0.25 Number of galaxies within a 333/h_75_kpc radius that lie within m3 and m3+2 (3) 45- 48 F4.1 --- Ne0.25 Abell-like richness estimate computed over the magnitude range meff to meff+2 within a 333/h75kpc radius 50- 54 F5.1 --- NA0.50 Number of galaxies within a 666/h_75_kpc radius that lie with in m3 and m3+2 (4) 56- 60 F5.1 --- Ne0.50 Abell-like richness estimate computed over the magnitude range meff to meff+2 within a 666/h75kpc radius (4) 62- 65 F4.1 --- sigma Significance of the detection 67- 69 I3 arcsec Rad Effective radius 71- 74 F4.1 mag m3 The statistically selected 3rd brightest cluster galaxy 76- 79 F4.1 mag meff The apparent magnitude at which the cluster is maximally enhanced over the background field (5) 81 A1 --- Qual Visually assigned quality flag for all candidates with Lambda ≥50 (6)
Note (1): Candidate with a detection significance of 2σ or greater. Note (2): The effective number of L* galaxies in the cluster and within the cutoff radius of the radial filter. Note (3): A statistical background subtraction, derived from galaxy counts in survey regions with no detected cluster candidates, is applied. Note (4): A statistical background subtraction, derived from galaxy counts in survey regions with no detected cluster candidates, is applied. But with m3 derived for the central 333/h75kpc region. Note (5): Derived by the matched filter algorithm. Note (6): Quality flags: 1: The detection does not appear to have a strong central concentration of galaxies and may very well be spurious, a poor group, or deblended substructure from a nearby rich cluster. Use of the visual quality flag is meant for non-statistical analyses only. 2: The cluster candidate is likely to be real but may also be a compact group. 3: The cluster candidate is almost certainly real - a substantial galaxy enhancement is seen and the galaxies exhibit a pronounced central concentration similar to spectroscopically confirmed clusters at similar redshifts.
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 2 A2 --- --- [CL] 3- 5 I3 --- [PLO2002] Cluster identification number (G1) 7- 8 I2 --- Gal Galaxy number (G1) 10 A1 --- f_Gal [*] Indicates used in the computation of the mean cluster redshift 12- 13 I2 h RAh Hour of Right Ascension (J2000) 15- 16 I2 min RAm Minute of Right Ascension (J2000) 18- 22 F5.2 s RAs Second of Right Ascension (J2000) 24 A1 --- DE- Sign of the Declination (J2000) 25- 26 I2 deg DEd Degree of Declination (J2000) 28- 29 I2 arcmin DEm Arcminute of Declination (J2000) 31- 34 F4.1 arcsec DEs Arcsecond of Declination (J2000) 36- 40 F5.2 mag Imag The I band magnitude 42- 47 F6.4 --- z ? Heliocentric redshift 49- 51 I3 km/s e_z ? Observational error in the Redshift 53- 77 A25 --- Comments Additional comments
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 2 A2 --- --- [CL] 4- 6 I3 --- [PLO2002] Cluster number (G1) 7 A1 --- m_[PLO2002] [AB] Multiplicity index on [PLO2002] 9- 14 F6.4 --- z ? Mean redshift 15 A1 --- n_z [?+] Note on z (1) 17 I1 --- Ngal ? Number of galaxies used to compute the cluster redshift 19- 20 I2 --- Nz Number of galaxy redshifts measured 22- 23 I2 --- Nspec Number of spectra extracted.
Note (1): Note on Redshift: +: redshifts that have a maximum spread in the individual galaxy redshifts that exceeds the nominal 3000km/s limit. ?: redshifts based on fewer than three galaxies and may not be very reliable
Global notes: Note (G1): In Simbad, clusters are identified as [PLO2002] NNNA, galaxies are identified as [PLO2002] NNN NN
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 13-Jan-2003
| The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line |
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