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J/AJ/121/3114 UBVR photometry of NGC 6712 with VLT (Paltrinieri+, 2001)
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VLT observations of the peculiar globular cluster NGC 6712.
III. The evolved stellar population.
Paltrinieri B., Ferraro F.R., Paresce F., de Marchi G.
<Astron. J. 121, 3114 (2001)>
=2001AJ....121.3114P
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ADC_Keywords: Clusters, globular ; Photometry, UBVRI
Keywords: globular clusters: individual (NGC 6712) - stars: evolution -
stars: Population II
Abstract:
We present extensive UBVR photometry of the Galactic globular cluster
(GGC) NGC 6712 obtained with the ESO Very Large Telescope (VLT) which
reaches down to 2 mag below the main-sequence turn-off and allows us
for the first time to determine the age of this cluster.
Objects:
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RA (2000) DE Designation(s)
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18 53 04.3 -08 42 21 NGC 6712
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 12 54 Red giant branch (RGB)-Sub-giant branch (SGB)
mean ridge line
table2.dat 56 113 Blue straggler stars (BSS) candidates in NGC 6712
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See also:
J/AJ/109/1131 : JHK Photometry in Metal Rich Globulars. I. (Kuchinski+ 1995)
J/AJ/109/1154 : JHK Photometry of Liller 1 (Frogel+ 1995)
J/AJ/110/2844 : JHK photometry of globular clusters. III. (Kuchinski+ 1995)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 F5.3 mag B-V The (B-V) color
7- 12 F6.3 mag Vmag The V band magnitude
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- BSS Blue straggler star (BSS or E-BSS) candidate
number (Cl* NGC 6712 BSS NNN or
Cl* NGC 6712 EBSS N in Simbad)
9- 13 I5 --- PFP Identification number
(Cl* NGC 6712 PFP NNNNN in Simbad)
15- 19 F5.2 mag Vmag The V band magnitude
21- 25 F5.2 mag Bmag The B band magnitude
27- 31 F5.2 mag Rmag The R band magnitude
33- 37 F5.2 mag Umag The U band magnitude
39- 46 F8.3 pix Xpix X pixel coordinate relative to the adopted
cluster center (1)
48- 55 F8.3 pix Ypix Y pixel coordinate relative to the adopted
cluster center (1)
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Note (1): In the adopted coordinate system the cluster center is at (0,0)
estimated at (18 53 04.6, -08 42 18.50) (J2000).
1 pixel = 0.1 arcsecond. North is up and east is to the left.
See Paper I, Ferraro et al., 2000ApJ...542L..29F, for the
description of the cluster center determination.
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History:
From electronic version of the journal
References:
Ferraro et al., Paper I 2000ApJ...542L..29F
Andreuzzi et al., Paper II 2001A&A...372..851A
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(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 11-Sep-2001