J/A+A/448/155 Radial velocities of Leo I globular clusters (Bergond+, 2006)
Wide-field kinematics of globular clusters in the Leo I group.
Bergond G., Zepf S.E., Romanowsky A.J., Sharples R.M., Rhode K.L.
<Astron. Astrophys., 448, 155-164 (2006)>
=2006A&A...448..155B 2006A&A...448..155B
ADC_Keywords: Galaxies, nearby ; Clusters, globular ; Velocity dispersion ;
Radial velocities ; Spectroscopy
Keywords: galaxies: elliptical and lenticular, cD - galaxies: halos -
galaxies: kinematics and dynamics - galaxies: star clusters
Abstract:
VLT/FLAMES radial velocities for 50 Globular Clusters (GCs), 37 field
stars and 21 unclassified objects around the Leo I group galaxies
NGC 3379 and NGC 3384 are presented. Object Id and BVR photometry are
from Rhode & Zepf (2004AJ....127..302R 2004AJ....127..302R). Positions (J2000.0) should be
accurate to ∼0"2 or better w.r.t. the GSC2.1 catalogue. Heliocentric
radial velocities and their errors were estimated by fitting the peak
(see the width, heigh, and Tonry & Davies (1979AJ.....84.1511T 1979AJ.....84.1511T)
coefficient) of the cross-correlation function (CCF) with the IRAF/RV
package task FXCOR, using simulatenous and ELODIE library stellar
templates. Objects have been assigned three quality class, class A
being the most secure velocity determination, and class C the least
secure; the latter objects require confirmation, and such GCs were not
considered for the dynamical analysis presented in the paper.
Description:
The FLAMES observations were carried out in service mode on VLT/UT2
(Kueyen), with the GIRAFFE/MEDUSA configuration. Our observing
programme consisted of five 2595-s exposures taken on separate nights,
in May-June 2003, under good seeing (∼0.7") conditions.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 74 50 34 certain / 8 probable / 8 possible Leo I GCs
tablea2.dat 74 37 32 certain / 4 probable / 1 possible field stars
tablea3.dat 90 21 21 unclassified targets (see "Notes" column)
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See also:
J/MNRAS/345/949 : NGC 3379 globular clusters UBRI photometry (Whitlock+, 2003)
Byte-by-byte Description of file: tablea[123].dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- [BZR2006] Running number from Rhode & Zepf
(2004AJ....127..302R 2004AJ....127..302R)
9- 10 I2 h RAh Right ascension (J2000)
12- 13 I2 min RAm Right ascension (J2000)
15- 19 F5.2 s RAs Right ascension (J2000)
21 A1 --- DE- Declination sign (J2000)
22- 23 I2 deg DEd Declination (J2000)
25- 26 I2 arcmin DEm Declination (J2000)
28- 31 F4.1 arcsec DEs Declination (J2000)
34- 38 F5.2 --- Vmag V-band magnitude
40- 43 F4.2 --- B-V B-V colour index
45- 48 F4.2 --- V-R V-R colour index
51- 54 F4.2 --- hCCF ? FXCOR CCF Gaussian fit peak height (1)
56- 58 I3 pix wCCF ? FXCOR CCF Gaussian fit peak width (1)
60- 63 F4.1 --- rCCF ? Tonry & Davies (1979AJ.....84.1511T 1979AJ.....84.1511T)
CCF-fit coefficient (1)
66- 69 I4 km/s RV ? Heliocentric radial velocity from FXCOR (1)
71- 72 I2 km/s e_RV ? FXCOR estimated error on RV
74 A1 --- q_RV [ABC] RV determination quality class (1)
(A most secure to C least secure)
76- 90 A15 --- Notes Notes
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Note (1): Values that are not in tablea3.dat
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Acknowledgements: Gilles Bergond, gilles(at)iaa.es
(End) Gilles Bergond [IAA, Granada, Spain], Paricia Vannier [CDS] 10-Mar-2006