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J/AJ/129/1832  Photometry in the NGC 4756 group of galaxies  (Grutzbauch+, 2005)

Small-scale systems of galaxies. II. Properties of the NGC 4756 group of galaxies. Grutzbauch R., Kelm B., Focardi P., Trinchieri G., Rampazzo R., Zeilinger W.W. <Astron. J., 129, 1832-1848 (2005)> =2005AJ....129.1832G
ADC_Keywords: Galaxies, photometry ; Radial velocities Keywords: distances and redshifts - galaxies: interactions - galaxies: photometry - techniques: spectroscopic Abstract: This paper is part of a series that focuses on investigating galaxy formation and evolution in small-scale systems of galaxies in low-density environments. We present results from a study of the NGC 4756 group, which is dominated by the elliptical galaxy NGC 4756. The characteristics of the group are investigated through (1) the detailed investigation of the morphological, photometric, and spectroscopic properties of nine galaxies among the dominant members of the group; (2) the determination of the photometric parameters of the faint galaxy population in an area of 34'x34' centered on NGC 4756; and (3) an analysis of the X-ray emission in the area based on archival data. The nine member galaxies are located in the core part of the NGC 4756 group (a strip∼300kpc in diameter, H0=70km/s/Mpc), which has a very loose configuration. The central part of the NGC 4756 group contains a significant fraction of early-type galaxies. Description: The observations were carried out at the ESO 3.6m telescope equipped with the multipurpose instrument EFOSC2 in the period 2000 May 5-7. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table6.dat 63 15 Bright group member candidates table7.dat 64 100 Faint group member candidates table8.dat 79 13 Additional group member candidates not included in our sample
See also: J/AJ/95/284 : Radial velocities in 14 rich clusters (Dressler+ 1988) J/A+AS/100/47 : Lyon Groups of Galaxies (Garcia 1993) Byte-by-byte Description of file: table6.dat table7.dat
Bytes Format Units Label Explanations
1- 5 I5 --- [GKF2005] SExtractor object identification 7- 8 I2 h RAh Hour of Right Ascension (J2000) 10- 11 I2 min RAm Minute of Right Ascension (J2000) 13- 16 F4.1 s RAs Second of Right Ascension (J2000) 18 A1 --- DE- Sign of the Declination (J2000) 19- 20 I2 deg DEd Degree of Declination (J2000) 22- 23 I2 arcmin DEm Arcminute of Declination (J2000) 25- 28 F4.1 arcsec DEs Arcsecond of Declination (J2000) 30- 33 F4.2 --- S/G SExtractor star-galaxy separator (star if parameter greater than 0.5) 35- 39 F5.2 mag Vmag The V band magnitude 41- 45 F5.2 mag/arcsec2 mu0 Central V band surface brightness 47- 52 F6.4 --- n Sersic index 54- 57 F4.1 arcsec Reff Effective radius 59- 63 F5.2 mag/arcsec2 mue Effective V band surface brightness
Byte-by-byte Description of file: table8.dat
Bytes Format Units Label Explanations
1- 12 A12 --- Name Object name 14- 15 I2 h RAh Hour of Right Ascension (J2000.0) 17- 18 I2 min RAm Minute of Right Ascension (J2000.0) 20- 23 F4.1 s RAs Second of Right Ascension (J2000.0) 25 A1 --- DE- Sign of the Declination (J2000.0) 26- 27 I2 deg DEd Degree of Declination (J2000.0) 29- 30 I2 arcmin DEm Arcminute of Declination (J2000.0) 32- 33 I2 arcsec DEs Arcsecond of Declination (J2000.0) 35- 49 A15 --- MType Morphological type 51- 55 F5.2 mag Bmag B band magnitude 57- 60 I4 km/s cz Radial velocity 63- 64 I2 km/s e_cz Error in cz 66- 69 I4 kpc D Projected distance from NGC 4756 71- 79 A9 --- Notes Notes (1)
Note (1): DS: Galaxy identification from Dressler & Shectman (1988, Cat. J/AJ/95/284); G: Group members of LGG 306 according to Garcia (1993, Cat. J/A+AS/100/47)
History: From electronic version of the journal References: Tanvuia et al., Paper I 2003AJ....126.1245T
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 07-Feb-2006
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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