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J/MNRAS/392/135     Galaxy clusters from SDSS                (Lopes+, 2009)

NoSOCS in SDSS. I. Sample definition and comparison of mass estimates. Lopes P.A.A., De Carvalho R.R., Kohl-Moreira J.L., Jones C. <Mon. Not. R. Astron. Soc., 392, 135-152 (2009)> =2009MNRAS.392..135L
ADC_Keywords: Surveys ; Clusters, galaxy Keywords: surveys - galaxies: clusters: general - galaxies: kinematics and dynamics Abstract: We use Sloan Digital Sky Survey (SDSS) data to investigate galaxy cluster properties of the systems first detected within Digitized Second Palomar Observatory Sky Survey. With the high-quality photometry of SDSS, we derived new photometric redshifts and estimated richness and optical luminosity. For a subset of low-redshift (z≤0.1) clusters, we have used SDSS spectroscopic data to identify groups in redshift space in the region of each cluster, complemented with massive systems from the literature to assure the continuous mass sampling. A method to remove interlopers is applied, and a virial analysis is performed resulting in the estimates of velocity dispersion, mass and a physical radius for each low-z system. Description: The work presented here is based on the supplement version of the NoSOCS (Lopes, 2003, PhD thesis, Observatorio Nacional (Brazil; Lopes et al,. 2004, Cat. J/AJ/128/1017). NoSOCS (Gal et al., 2000AJ....119...12G, 2003, Cat. J/AJ/125/2064; 2009, J/AJ/137/2981) is a catalogue of galaxy clusters constructed from the digitized version of the Second Palomar Observatory Sky Survey (POSS-II; DPOSS). Hence, we decided to complement our sample with the one including massive systems studied by Rines & Diaferio (2006, cat. J/AJ/132/1275). Their sample comprises 74 X-ray-selected clusters at z≤0.1 within the SDSS Date Release 4 (DR4; see their table 1). This set is named Cluster Infall Regions in SDSS (CIRS). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 108 127 Main properties of the 127 NoSOCS clusters at z≤0.01 and with at least 10 member galaxies table2.dat 108 127 Velocity dispersion, characteristic radii and masses of 127 NoSOCS clusters table3.dat 108 56 Main properties of the 56 CIRS clusters (J/AJ/132/1275) at z≤0.01 and with at least 10 member galaxies table4.dat 108 56 Velocity dispersion, characteristic radii and masses of the 56 CIRS clusters table5.dat 87 183 *X-ray luminosity and temperature of the NoSOCS plus CIRS clusters
Note on table5.dat: We fixed a bug in the code used to estimate the X-ray luminosity and its associated error. Hence, this is the updated table, presented in Paper II (Lopes et al., 2009MNRAS.399.2201L) as table A1.
See also: J/AJ/125/2064 : Northern Optical Cluster Survey. II. (Gal+, 2003) J/AJ/137/2981 : Northern Optical Cluster Survey. III. (Gal+, 2009) J/AJ/128/1017 : Northern Optical Cluster Survey. IV. (Lopes+, 2005) J/AJ/132/1275 : CIRS (Cluster Infall Regions in the SDSS). I. (Rines+, 2006) : SDSS Home Page Byte-by-byte Description of file: table[13].dat
Bytes Format Units Label Explanations
1- 19 A19 --- Name Name (1) 21- 29 F9.5 deg RAdeg Right ascension in decimal degrees (J2000) 31- 39 F9.5 deg DEdeg Declination in decimal degrees (J2000) 41- 46 F6.4 --- zhel Heliocentric redshift (from CIRS for table3) 48- 53 F6.4 --- zhel2 ? New heliocentric redshift, from SDSS, (only for table3) 55- 59 F5.1 --- Ngal Number of galaxies (richness) 61- 64 F4.1 --- e_Ngal rms uncertainty on Ngal 66- 70 F5.3 10+12Lsun Lopt Optical luminosity 72- 76 F5.3 10+12Lsun e_Lopt rms uncertainty on Lopt 78- 83 F6.1 --- beta ?=-10.0 Asymetry (beta parameter) (2) 84- 85 A2 --- --- [00] 87- 93 F7.3 --- e_beta ?=-99.000 rms uncertainty on beta 95-101 F7.3 --- delta ?=-9.999 Cumulative deviation (Δ parameter) (2) 103-108 F6.3 --- e_delta ?=-9.999 rms uncertainty on delta
Note (1): NSCS JHHMMSS+DDMMSS in table1. Note (2): Parameters obtained from the substructure tests and their significance (see Section 5 of paper)
Byte-by-byte Description of file: table[24].dat
Bytes Format Units Label Explanations
1- 19 A19 --- Name Name 21- 26 F6.1 km/s sig Line-of-sight velocity dispersion 28- 32 F5.1 km/s e_sig Error on sig (lower limit) 34- 38 F5.1 km/s E_sig Error on sig (upper limit) 40- 42 I3 --- Nm Number of cluster members used for that estimate 44- 46 I3 --- N200 Number of cluster members within R200 48- 51 F4.2 Mpc R500 Radius R500 (1) 53- 56 F4.2 Mpc e_R500 Error on R500 (lower limit) 58- 61 F4.2 Mpc E_R500 Error on R500 (upper limit) 63- 67 F5.2 10+14Msun M500 Mass for a radius of R500 69- 72 F4.2 10+14Msun e_M500 Error on M500 (lower limit) 74- 77 F4.2 10+14Msun E_M500 Error on M500 (upper limit) 79- 82 F4.2 Mpc R200 Radius R200 (1) 84- 87 F4.2 Mpc e_R200 Error on R200 (lower limit) 89- 92 F4.2 Mpc E_R200 Error on R200 (upper limit) 94- 98 F5.2 10+14Msun M200 Mass for a radius of R200 100-103 F4.2 10+14Msun e_M200 Error on M200 (lower limit) 105-108 F4.2 10+14Msun E_M200 Error on M200 (upper limit)
Note (1): Radius defined as: R200 = RA(ρ[200ρc(z)])1/2 and R500 = RAV[200ρc(z)])1/2 where * RA is the Radius * ρV=3MV(3πRA3) * MV is the virial mass in a volume of radius RA * ρc(z) is the critical density at redshift z * M500 is the virial mass for RA=R500, * M200 is the virial mass for RA=R200.
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 19 A19 --- Name Cluster name 21- 26 F6.3 10+37W LXa ?=99.999 Annulus background X-ray luminosity 28- 33 F6.3 10+37W e_LXa ?=99.999 rms uncertainty on LXa 35- 40 F6.3 10+37W LXf ?=99.999 Frame background X-ray luminosity 42- 47 F6.3 10+37W e_LXf ?=99.999 rms uncertainty on LXf 49- 54 F6.3 10+37W LXb ?=99.999 Box background X-ray luminosity 56- 61 F6.3 10+37W e_LXb ?=99.999 rms uncertainty on LXb 63- 67 F5.2 keV TXB ?=- BAX X-ray temperature (1) 70- 73 F4.2 keV e_TXB ?=- Error on TXB (lower limit) 76- 79 F4.2 keV E_TXB ?=- Error on TXB (upper limit) 81- 85 F5.2 keV TX ?=- Interpolated RASS X-ray temperature obtained from the LX-TX relation 86- 87 A2 --- Q Detection flag (2)
Note (1): BAX: X-ray galaxy clusters database, Note (2): Detection flag as follows: SD = significant detection UL = upper limit XX = measurements should be taken with concern
History: * 09-Jun-2009: From electronic version of the journal * 18-Aug-2011: table5 updated from Paper II (Lopes et al., 2009MNRAS.399.2201L) References: Gal et al., NoSOCS I 2000AJ....119...12G Gal et al., NoSOCS II 2003AJ....125.2064G Cat. J/AJ/125/2064 Gal et al., NoSOCS III 2009AJ....137.2981G Cat. J/AJ/137/2981 Lopes et al., NoSOCS IV 2004AJ....128.1017L Cat. J/AJ/137/2981 Lopes et al., Paper II 2009MNRAS.399.2201L
(End) Patricia Vannier [CDS] 11-May-2009
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