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J/A+A/481/593       Radial velocities in A2163             (Maurogordato+, 2008)

A2163: Merger events in the hottest Abell galaxy cluster I. Dynamical analysis from optical data. Maurogordato S., Cappi A., Ferrari C., Benoist C., Mars G., Soucail G., Arnaud M., Pratt G.W., Bourdin H., Sauvageot J-L. <Astron. Astrophys. 481, 593 (2008)> =2008A&A...481..593M
ADC_Keywords: Clusters, galaxy ; Redshifts ; Radial velocities Keywords: galaxies: clusters: general - galaxies: redshifts - catalogues Abstract: A2163 is among the richest and most distant Abell clusters, presenting outstanding properties in different wavelength domains. X-ray observations have revealed a distorted gas morphology and strong features have been detected in the temperature map, suggesting that merging processes are important in this cluster. However, the merging scenario is not yet well-defined. We have undertaken a complementary optical analysis, aiming to understand the dynamics of the system, to constrain the merging scenario and to test its effect on the properties of galaxies. We present a detailed optical analysis of A2163 based on new multicolor wide-field imaging and medium-to-high resolution spectroscopy of several hundred galaxies. Description: Velocity measurements for 512 objects obtained by multiobject spectroscopy in a field of 30'x30' centered on the galaxy cluster Abell 2163 are presented. For each object, table1.dat provides the spectroscopic identification number, right ascension and declination (J2000.0); radial velocity and the associated error, RTR parameter (Tonry and Davis, 1981ApJ...246..680T) as an indicator of the goodness of the cross-correlation redshift, a quality flag for the redshift, a flag indicating the presence of emission lines, and a flag corresponding to the instrument used. Objects are sorted by increasing Right Ascension. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 52 512 Velocity measurements for 512 objects in the central 30'x30' field of the galaxy cluster Abell 2163
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
2- 4 I3 --- Seq [1/512] Spectroscopy identification number 6- 7 I2 h RAh Right ascension (J2000.0) 9- 10 I2 min RAm Right ascension (J2000.0) 12- 16 F5.2 s RAs Right ascension (J2000.0) 18 A1 --- DE- Declination sign (J2000.0) 19 I1 deg DEd Declination (J2000.0) 21- 22 I2 arcmin DEm Declination (J2000.0) 24- 27 F4.1 arcsec DEs Declination (J2000.0) 29- 34 I6 km/s RV Radial velocity 36- 38 I3 km/s e_RV Error on radial velocity 40- 43 F4.1 --- RTD RTD parameter (Tonry and Davis, 1981ApJ...246..680T) (1) 46 A1 --- Fz [0/1] Quality flag for RV (0=high) (2) 49 A1 --- Fem [0/1] Emission lines flag (3) 52 I1 --- Run [1/2] Instrument Flag (4)
Note (1): When RTD>3 the cross-correlation redshift can be considered as reliable. Note (2): Quality flag for the redshift is: 0 = high precision velocities 1 = medium precision ones Note (3): Emission lines flag is: 0 = no emission 1 = emission lines are clearly identified Note (4): Instrument Flag is: 1 = VIMOS runs at ESO/VLT 2 = MOS run at CFHT
Acknowledgements: Sophie Maurogordato, sophie.maurogordato(at)
(End) Sophie Maurogordato [CNRS, France], Patricia Vannier [CDS] 03-Apr-2008
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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