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J/ApJ/607/202       Redshift survey of nearby galaxy groups     (Mahdavi+, 2004)

A redshift survey of nearby galaxy groups: the shape of the mass density profile Mahdavi A., Geller M.J. <Astrophys. J. 607, 202 (2004)> =2004ApJ...607..202M
ADC_Keywords: Clusters, galaxy ; X-ray sources ; Redshifts ; Velocity dispersion Keywords: galaxies: clusters: general - galaxies: kinematics and dynamics - galaxies: statistics Abstract: We constrain the mass profile and orbital structure of nearby groups and clusters of galaxies. Our method yields the joint probability distribution of the density slope n, the velocity anisotropy β, and the turnover radius r0 for these systems. The measurement technique does not use results from N-body simulations as priors. We incorporate 2419 new redshifts (included here) in the fields of 41 systems of galaxies with z<0.04. Description: We obtained spectra of the 2419 target galaxies with the FAST single object spectrograph on the 1.5m Tillinghast Reflector at Whipple Observatory on Mount Hopkins, Arizona. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 86 41 Newly Observed Systems table2.dat 52 2419 Galaxy Positions and Velocities
See also: IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999) IX/29 : ROSAT All-Sky Survey Faint Source Catalog (Voges+ 2000) J/ApJ/518/69 : Deep Optical Catalog of galaxy systems (Mahdavi+, 1999) J/ApJ/534/114 : RASSCALS: X-ray and optical study (Mahdavi+, 2000) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1 A1 --- f_RASSCALS [*] position differs from that in Mahdavi et al., 2000, Cat. J/ApJ/534/114 (G1) 2- 8 A7 --- RASSCALS System designation 9 A1 --- n_RASSCALS [ab] Note on name (1) 11- 12 I2 h RAh Right ascension (J2000.0) 14- 15 I2 min RAm Right ascension (J2000.0) 17- 20 F4.1 s RAs Right ascension (J2000.0) 22 A1 --- DE- Declination sign (J2000.0) 23- 24 I2 deg DEd Declination (J2000.0) 26- 27 I2 arcmin DEm Declination (J2000.0) 29- 32 F4.1 arcsec DEs Declination (J2000.0) 34- 36 I3 --- Nobs Number of galaxies whose redshifts were measured in this work 38- 40 I3 --- Nmemb Number we identify as group members 42- 46 I5 km/s cz Mean group heliocentric redshift 48- 50 I3 km/s e_cz rms uncertainty on cz 52- 54 I3 km/s sigmaz Velocity dispersion 56- 58 I3 km/s e_sigmaz rms uncertainty on sigmaz 60 A1 --- l_logLX Limit flag on logLX 61- 66 F6.3 [10-7W] logLX X-ray luminosity in the 0.1-2.4keV band, in (h100-1)*erg/s 68- 71 F4.2 [10-7W] e_logLX ? rms uncertainty on logLX 73- 86 A14 --- OName Other designation
Note (1): Notes mean the following: a = The data for these groups appeared originally in Mahdavi et al. (1999, Cat. J/ApJ/518/69); however, our algorithm for determining group membership differs from the one used in that work, and hence the total number of members varies slightly. In addition, Nobs in our table differs from NTotal in Mahdavi et al. (1999, Cat. J/ApJ/518/69) because we list the actual number of galaxies observed, rather than the number in the field brighter than a given magnitude. The RASSCALS name (this paper) is NOT corresponding to the DOC name (Mahdavi+, 1999, J/ApJ/518/69). b = Because of their large velocity dispersions, these systems were grouped with the rich clusters in Table 3 for our analysis.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 7 A7 --- RASSCALS System designation (1) 8 A1 --- --- [.] 9- 11 I3 --- Galaxy Galaxy sequential number in the system (1) 13- 14 I2 h RAh Hour of Right Ascension (J2000) 16- 17 I2 min RAm Minute of Right Ascension (J2000) 19- 22 F4.1 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- 32 I2 arcsec DEs Arcsecond of Declination (J2000) 34- 38 I5 km/s cz Redshift velocity 40- 42 I3 km/s e_cz Measurement error in Redshift 44- 49 F6.3 Mpc Dist Distance from the X-ray center (2) 52 A1 --- Memb [MN] Member (M) or non-member (N)
Note (1): The galaxy name consists of the group name plus a three-digit identifier. The list is sorted by right ascension. Galaxies are identified as RASSCALS SS2aNNN.NNN, RASSCALS SRGaNNN.NNN and RASSCALS NRGaNNN.NNN in Simbad. Each of the following pairs of entries represents two separate measurements of the same galaxy: SRGb145.047 and SRGb149.002; SRGb145.049 and SRGb149.003; SRGb145.052 and SRGb149.010; SRGb145.050 and SRGb149.005; SRGb145.054 and SRGb149.011. All other entries represent unique galaxies. Note (2): Assuming H0=100km/s/Mpc. Distances greater than 1.5Mpc occur because of differences between the optical center of the group (used to select targets for the survey) and the X-ray center of the group (used to calculate the distance in this table).
Global notes: Note (G1): (added by CDS) For 4 clusters, the position differs from that in Mahdavi et al., 2000, J/ApJ/534/114: -------------------------------------------------------- Name M2000 This paper -------------------------------------------------------- NRGb025 09 13 54.9 +30 00 38 09 13 28.3 +30 06 13.7 NRGb057 09 43 56.7 +36 17 13 09 44 28.1 +36 08 55.7 NRGs156 11 45 33.3 +33 14 46 11 46 16.3 +33 11 03.1 SRGb158 02 55 09.9 +09 16 43 02 55 51.0 +09 18 48.4 ---------------------------------------------------------
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 16-Nov-2004
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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