J/A+AS/115/297 BVRI photometry of Central Field of ω Cen (Lynga+, 1996)
The central field of Omega Centauri
Lynga G.
<Astron. Astrophys. Suppl. Ser. 115, 297 (1996)>
=1996A&AS..115..297L 1996A&AS..115..297L
ADC_Keywords: Clusters, globular ; Photometry, BVRI
Keywords: globular cluster: Omega Cen - stars: horizontal branch -
blue stragglers, HR diagram
Description:
This is a four colour photometric study of stars in the central part
of the globular cluster ω Centauri. The observations were made
at Siding Spring Observatory in April 1992 with the 1m ANU telesecope;
a 1024x1024CCD has been used. The photometry was reduced to the BVRI
system using standards by Landolt
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 77 61 Bright stars in the centre of ω Centauri (V<12)
table5.dat 77 59 Blue stars in the centre of ω Centauri;
B-V≤0.1; if B not measured: V-R≤0.2
and V-I confirming blue colour
catalog.dat 77 3518 BVRI photometry and equatorial positions
for stars in the centre of ω Centauri
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Byte-by-byte Description of file: table4.dat table5.dat catalog.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Id Identification number (1)
7- 8 I2 h RAh Right ascension (J2000)
10- 11 I2 min RAm Right ascension (J2000)
13- 16 F4.1 s RAs Right ascension (J2000)
19 A1 --- DE- Declination sign
20- 21 I2 deg DEd Declination (J2000)
23- 24 I2 arcmin DEm Declination (J2000)
26- 27 I2 arcsec DEs Declination (J2000)
30- 34 F5.2 mag Vmag V magnitude
36- 39 F4.2 mag e_Vmag Error on V magnitude
41- 45 F5.2 mag B-V ? B-V colour index
47- 50 F4.2 mag e_B-V ? Error on B-V
53- 56 F4.2 mag V-R ? V-R colour index
58- 61 F4.2 mag e_V-R ? Error on V-R
63- 67 F5.2 mag V-I ? V-I colour index
69- 72 F4.2 mag e_V-I ? Error on V-I
75- 77 I3 arcsec Dist Distance from the centre of the cluster
as defined in the paper (13:26:46.8-47:28:47)
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Note (1): No. 1466 and 2073 coincide with UIT-1 and UIT-2
(Landsman et al., 1992)
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References:
Landsman W.B et al. 1992 Bull. American Astron. Soc., 24, 1294,
=1992BAAS...24R1294L 1992BAAS...24R1294L
(End) Simona Mei [CDS] 01-Aug-1995