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. =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 16deg^2^ 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 {Lambda}_CL_ value (2) 40- 43 F4.1 --- NA0.25 Number of galaxies within a 333/h_75_kpc radius that lie within m_3_ and m_3_+2 (3) 45- 48 F4.1 --- Ne0.25 Abell-like richness estimate computed over the magnitude range m_eff_ to m_eff_+2 within a 333/h_75_kpc radius 50- 54 F5.1 --- NA0.50 Number of galaxies within a 666/h_75_kpc radius that lie with in m_3_ and m_3_+2 (4) 56- 60 F5.1 --- Ne0.50 Abell-like richness estimate computed over the magnitude range m_eff_ to m_eff_+2 within a 666/h_75_kpc 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 2{sigma} 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 m_3_ derived for the central 333/h_75_kpc 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