J/A+AS/82/71 Deep photometry of NGC 5694 and Terzan 8 (Ortolani+, 1990)
Deep photometry of globular clusters.
XII. The metal-poor clusters NGC 5694 and Terzan 8
Ortolani S.,Gratton R.
<Astron. Astrophys. Suppl. Ser. 82, 71 (1990)>
=1990A&AS...82...71O 1990A&AS...82...71O (SIMBAD/NED Reference)
ADC_Keywords: Clusters, globular; Photometry, CCD
Keywords: clusters: globular - stars: photometry
(the) galaxy: structure and evolution of
Description:
We present deep CCD photometries for the little known metal-poor
clusters NGC 5694 and Terzan 8 down to V∼24. NGC 5694 has a blue
horizontal branch, a very high radial velocity, a metallicity of
[Fe/H]=-1.65±0.06, a reddening of E(B-V)=0.10±0.03, and an
apparent distance modulus of (m-M)v=17.82±0.15. It is located at
26.0±1.8kpc from the galactic center. The helium content derived
from the ratio between the number of stars on the horizontal branch
and the giant and asymptotic giant branches is consistent with that
obtained for other clusters. Terzan 8 is a metal-poor
([Fe/H]=-1.81±0.10) moderately reddened (E(B-V)=0.20±0.05)
cluster with a blue horizontal branch and apparent distance modulus of
(m-M)v=17.25±0.15. It is located at 13.8±2.0 kpc from the
galactic center. The c-m diagram and the luminosity function of NGC
5694 and Terzan 8 are similar to the M92 ones. NGC 5694 and Terzan 8
have ages close to that of the "classical" globular cluster M92.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3 58 1219 NGC 5694 photometry
table4 41 1522 Terzan 8 photometry
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Byte-by-byte Description of file: table3
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Bytes Format Units Label Explanations
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2- 5 I4 --- Star Star number
9- 13 F5.1 pix Xpos X position
16- 20 F5.1 pix Ypos Y position
23- 28 F6.3 mag Vmag V magnitude
34- 38 F5.3 mag e_Vmag Error on V magnitude
42- 47 F6.3 mag B-V B-V colour index
50- 54 F5.3 mag e_B-V Error on B-V
58 I1 --- Note []? Note (1)
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Note (1): When '2' star is rejected using criteria described in Sect. 4.1
of the paper
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Byte-by-byte Description of file: table4
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Bytes Format Units Label Explanations
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2- 5 I4 --- Star Star number
8- 13 F6.1 pix Xpos X position
16- 20 F5.1 pix Ypos Y position
23- 28 F6.3 mag Vmag V magnitude
31- 36 F6.3 mag B-V B-V colour index
39 I1 --- Note []? Note (1)
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Note (1): 1: star measured on both frames
2: star measured on frame 2 only
3: star measured on frame 1 only
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Historical Notes: Keypunched at CDS
(End) Marie-Jose Wagner, Simona Mei [CDS] 13-Mar-1995