J/A+AS/142/373 Proper motions and BVRI photometry in NGC 4147 (Wang+, 2000)
Kinematics and CMD of the globular cluster NGC 4147.
Wang J.J., Chen L., Wu Z.-Y., Gupta A.C., Geffert M.
<Astron. Astrophys. Suppl. Ser. 142, 373 (2000)>
=2000A&AS..142..373W 2000A&AS..142..373W
ADC_Keywords: Clusters, globular ; Proper motions ; Photometry, UBVRI
Keywords: stars: kinematics - stars: Hertzsprung-Russell and C-M diagrams -
globular clusters: individual: NGC 4147
Abstract:
Astrometry and B VRI CCD photometry of 115 stars down to B=17.6 in the
region of about 11'x11' around the globular cluster NGC 4147 was
performed. In the astrometric reduction, three earlier epoch plates
taken at Sheshan, Shanghai, China, in 1958 and four recent epoch
B-passband CCD frames taken at Kavalur, India, were used. The data
were reduced to a catalogue based on measurements of stars on seven
plates with an epoch period from 1917 to 1979 taken in Bonn, Germany,
and ultimately to the Hipparcos catalogue. The reduction was done with
the central overlapping method. Based on the new proper motion data,
the membership probabilities of 115 stars were determined.
Furthermore, three colour-magnitude diagrams (CMD) of V versus B-V, V-R
and V-I, respectively, for HB and GB stars were constructed from CCD
photometry obtained with the Vainu Bappu Telescope. An absolute proper
motion of the cluster of -2.08±0.48mas/yr in right ascension and
-3.07±0.46mas/yr in declination has been obtained. The space
velocity and apogalactic distance of the cluster with respect to the
Galactic standard of rest were calculated. In contrast to the first
results given in the literature we obtain a significantly lower
velocity and a smaller apogalactic distance for NGC 4147.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table9.dat 129 115 Absolute proper motions and BVRI photometry of 115
stars in the region of globular cluster NGC 4147
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- WCW Sequential number (Cl* NGC 4147 WCW NNN)
5- 8 I4 --- GHC Sequential number in the complete photometric
catalogue of A.C. Gupta (to be published)
10- 11 I2 ---- N(Ge) ? Sequential number in
Geffert et al. (1997) (1)
13- 17 I5 --- I(Ge) ? Internal number in Geffert et al. (1997) (1)
19- 24 F6.3 mag Vmag V magnitude
26- 28 I3 10-3mag e_Vmag rms uncertainty on Vmag
30- 34 F5.3 mag B-V B-V colour index
36- 38 I3 10-3mag e_B-V rms uncertainty on B-V
40- 44 F5.3 mag V-R V-R colour index
46- 49 I4 10-3mag e_V-R rms uncertainty on V-R
51- 55 F5.3 mag V-I V-I colour index
57- 59 I3 10-3mag e_V-I rms uncertainty on V-I
61- 62 I2 h RAh Right ascension (J2000.0)
64- 65 I2 min RAm Right ascension (J2000.0)
67- 74 F8.5 s RAs Right ascension (J2000.0)
76- 79 I4 10-5s e_RAs rms uncertainty on RA
81 A1 --- DE- Declination sign (J2000.0)
82- 83 I2 deg DEd Declination (J2000.0)
85- 86 I2 arcmin DEm Declination (J2000.0)
88- 94 F7.4 arcsec DEs Declination (J2000.0)
96- 99 I4 0.1mas e_DEs rms uncertainty on DE
101-105 I5 10-2mas/yr pmRA Proper motion in right ascension
(µRA*cos(DE))
107-110 I4 10-2mas/yr e_pmRA rms uncertainty on pmRA
112-116 I5 10-2mas/yr pmDE Proper motion in declination
118-121 I4 10-2mas/yr e_pmDE rms uncertainty on pmDE
123 I1 --- Np Number of plates containing this star
125-127 F3.2 --- Pmemb Membership probability
129 I1 --- Mm [0/1] Member selection
(0: non-member, 1: member)
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Note (1): Geffert et al., 1997, in ESA SP-402. ESA Publications Division
Noordwijk, p. 579
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History:
Prepared via OCR at CDS.
(End) James Marcout, Patricia Bauer [CDS] 25-May-2000